#:1#
# commandlinefu.com by David Winterbottom


#:2#
# commandlinefu.com by David Winterbottom


#:3#
# commandlinefu.com by David Winterbottom

# Randomize lines (opposite of | sort)
perl -wl -e '@f=<>; for $i (0 .. $#f) { $r=int rand ($i+1); @f[$i, $r]=@f[$r,$i]
 if ($i!=$r); } chomp @f; print join $/, @f;' try.txt

# Randomize lines (opposite of | sort)
random -f <file>

# Randomize lines (opposite of | sort)
cat ~/SortedFile.txt | perl -wnl -e '@f=<>; END{ foreach $i (reverse 0 .. $#f) {
 $r=int rand ($i+1); @f[$i, $r]=@f[$r,$i] unless ($i==$r); }  chomp @f; foreach
$line (@f){ print $line; }}'

# Output files without comments or empty lines
function catv { egrep -v "^$|^#" ${*} ; }

# Replace all tabs with spaces in an application
grep -PL "\t" -r . |  grep -v ".svn" | xargs sed -i 's/\t/    /g'

# wrap long lines of a text
fold -s -w 90 file.txt

# Display a File with Line Number
nl filename | more

# Load another file in vim
:split <file>

# Pipe STDOUT to vim
tail -1000 /some/file | vim -

# Add a line to a file using sudo
echo "foo bar" | sudo tee -a /path/to/some/file

# Output files without comments or empty lines
grep -v "^\($\|#\)" <filenames>

# See which files differ in a diff
diff dir1 dir2 | diffstat

# Delete line number 10 from file
sed -i '10d' <somefile>

# Efficiently print a line deep in a huge log file
sed '1000000!d;q' < massive-log-file.log


#:4#
# commandlinefu.com by David Winterbottom

# Sort all running processes by their memory & CPU usage
ps aux --sort=%mem,%cpu

# View Processeses like a fu, fu
pstree -p

# View Processeses like a fu, fu
command ps -Hacl -F S -A f

# Will email user@example.com when all Rsync processes have finished.
$(while [ ! -z "$(pgrep rsync)" ]; do echo; done; echo "rsync done" | mailx user
@example.com) > /dev/null &

# Check processes runed not by you
ps aux | grep -v `whoami`

# Manually Pause/Unpause Firefox Process with POSIX-Signals
killall -STOP -m firefox

# View process statistics in realtime
top

# Find out current working directory of a process
echo COMMAND | xargs -ixxx ps -C xxx -o pid= | xargs -ixxx ls -l /proc/xxx/cwd

# Click on a GUI window and show its process ID and command used to run the proc
ess
xprop | awk '/PID/ {print $3}' | xargs ps h -o pid,cmd


#:5#
# commandlinefu.com by David Winterbottom

# Simple read and write test with Iozone
iozone -s 2g -r 64 -i 0 -i 1 -t 1

# locate a filename, make sure it exists and display it with full details
locate -e somefile | xargs ls -l

# currently mounted filesystems in nice layout
column -t /proc/mounts

# Which files/dirs waste my disk space
du -aB1m|awk '$1 >= 100'

# Check if filesystem hangs
ls /mnt/badfs &

# Migrate existing Ext3 filesystems to Ext4
tune2fs -O extents,uninit_bg,dir_index /dev/yourpartition

# create an emergency swapfile when the existing swap space is getting tight
sudo dd if=/dev/zero of=/swapfile bs=1024 count=1024000;sudo mkswap /swapfile; s
udo swapon /swapfile

# List files recursively sorted by modified time
find /home/fizz -type f -printf '%TY-%Tm-%Td %TT %p\n' | sort

# automount samba shares as devices in /mnt/
sudo vi /etc/fstab; Go//smb-share/gino /mnt/place smbfs defaults,username=gino,p
assword=pass 0 0<esc>:wq; mount //smb-share/gino

# Find all directories on filesystem containing more than 99MB
du -hS / | perl -ne '(m/\d{3,}M\s+\S/ || m/G\s+\S/) && print'

# currently mounted filesystems in nice layout
mount | column -t

# Move a file up a directory.
mv file_name.extension ..


#:6#
# commandlinefu.com by David Winterbottom

# Simple XML tag extract with sed
sed -n 's/.*<foo>\([^<]*\)<\/foo>.*/\1/p'

# Working random fact generator
lynx -dump randomfunfacts.com | grep -A 3 U | sed 1D

# Alias to edit and source your .bashrc file
alias vb='vim ~/.bashrc; source ~/.bashrc'


#:7#
# commandlinefu.com by David Winterbottom

# Write and run a quick C program
cat | gcc -x c -o a.out - && ./a.out && rm a.out

# List symbols from a dynamic library (.so file)
nm --dynamic <libfile.so>

# display typedefs, structs, unions and functions provided by a header file
cpp /usr/include/stdio.h | grep -v '^#' | grep -v '^$' | less


#:8#
# commandlinefu.com by David Winterbottom

# List symbols from a dynamic library (.so file)
nm --dynamic <libfile.so>


#:9#
# commandlinefu.com by David Winterbottom


#:10#
# commandlinefu.com by David Winterbottom

# Easily decode unix-time (funtion)
utime(){ perl -e "print localtime($1).\"\n\"";}

# convert unixtime to human-readable
perl -e 'print scalar(gmtime(1234567890)), "\n"'

# convert unixtime to human-readable
echo "0t${currentEpoch}=Y" | /usr/bin/adb

# Get yesterday's date or a previous time
date -d '1 day ago'; date -d '11 hour ago'; date -d '2 hour ago - 3 minute'; dat
e -d '16 hour'

# decoding Active Directory date format
ldapsearch -v -H ldap://<server> -x -D cn=<johndoe>,cn=<users>,dc=<ourdomain>,dc
=<tld> -w<secret> -b ou=<lazystaff>,dc=<ourdomain>,dc=<tld> -s sub sAMAccountNam
e=* '*' | perl -pne 's/(\d{11})\d{7}/"DATE-AD(".scalar(localtime($1-11644473600)
).")"/e'

# print date 24 hours ago
date --date=yesterday


#:11#
# commandlinefu.com by David Winterbottom

# Show Network IP and Subnet
ipcalc $(ifconfig eth0 | grep "inet addr:" | cut -d':' -f2,4 | sed 's/.+Bcast:/\
//g') | awk '/Network/ { print $2 } '

# Show Network IP and Subnet
IP=`ifconfig eth0 | grep "inet addr:" | ips |cut -d ":" -f 2 | cut -d " " -f 1`;
SUBNET=`ifconfig eth0 | grep "inet addr:" | ips |cut -d ":" -f 3 | cut -d " " -f
 1`;RANGE=`ipcalc $IP/$SUBNET | grep "Network:" | cut -d ' ' -f 4`;echo $RANGE

# Get your external IP address
wget -qO - http://www.sputnick-area.net/ip;echo

# Get your external IP address
wget -q -O - checkip.dyndns.org|sed -e 's/.*Current IP Address: //' -e 's/<.*$//
'

# Get your external IP address
lynx --dump http://ip.boa.nu|sed -e 's/^[[:space:]]*//' -e 's/*[[:space:]]$//'|g
rep -v ^$

# Get your external IP address
wget -O - -q ip.boa.nu

# Get your external IP address
curl whatismyip.org

# Get your external IP address with the best commandlinefu.com command
eval $(curl -s http://www.commandlinefu.com/commands/matching/external/ZXh0ZXJuY
Ww=/sort-by-votes/plaintext|sed -n '/^# Get your external IP address$/{n;p;q}')

# Get your external IP address with a random commandlinefu.com command
IFS=$'\n';cl=($(curl -s http://www.commandlinefu.com/commands/matching/external/
ZXh0ZXJuYWw=/sort-by-votes/plaintext|sed -n '/^# Get your external IP address$/{
n;p}'));c=${cl[$(( $RANDOM % ${#cl[@]} ))]};eval $c;echo "Command used: $c"

# Get your external IP address
exec 3<>/dev/tcp/whatismyip.com/80; echo -e "GET /automation/n09230945.asp HTTP/
1.0\r\nHost: whatismyip.com\r\n" >&3; a=( $(cat <&3) ); echo ${a[${#a[*]}-1]};

# Get your external IP address
echo -e "GET /automation/n09230945.asp HTTP/1.0\r\nHost: whatismyip.com\r\n" | n
c whatismyip.com 80 | tail -n1

# Get your external IP address
curl ip.appspot.com

# List Network Tools in Linux
apropos network |more

# send echo to socket network
echo foo | netcat 192.168.1.2 25

# send echo to socket network
echo "foo" > /dev/tcp/192.168.1.2/25

# Another way to see the network interfaces
ip addr show

# Echo the local IP addresses of the machines on your local network
for i in 192.168.1.{61..71};do ping -c 1 $i &> /dev/null && echo $i;fi;done

# Resolve the "all display buffers are busy, please try later" error on a Foundr
y
dm display-buffer reset

# Get your external IP address
fetch -q -o - http://ipchicken.com | egrep -o '([[:digit:]]{1,3}\.){3}[[:digit:]
]{1,3}'

# Get your external IP address
curl -s 'http://checkip.dyndns.org' | sed 's/.*Current IP Address: \([0-9\.]*\).
*/\1/g'

# Delete all aliases for a network interface on a (Free)BSD system
ifconfig | grep "0xffffffff" | awk '{ print $2 }' | xargs -n 1 ifconfig em0 dele
te

# Get all IPs via ifconfig
ifconfig -a | perl -nle'/(\d+\.\d+\.\d+\.\d+)/ && print $1'

# What is My WAN IP?
curl -s checkip.dyndns.org | grep -Eo '[0-9\.]+'

# Show established network connections
lsof -i | grep -i estab

# One-Liner to Display IP Addresses
python -c "import socket; print '\n'.join(socket.gethostbyname_ex(socket.gethost
name())[2])"


#:12#
# commandlinefu.com by David Winterbottom

# Manage "legacy" service run control links
sudo find /etc/rc{1..5}.d -name S99myservice -type l -exec sh -c 'NEWFN=`echo {}
 | sed 's/S99/K99/'` ; mv -v {} $NEWFN' \;

# Run a file system check on your next boot.
sudo touch /forcefsck

# List all files opened by a particular command
lsof -c dhcpd

# List files opened by a PID
lsof -p 15857


#:13#
# commandlinefu.com by David Winterbottom

# backup local MySQL database into a folder and removes older then 5 days backup
s
mysqldump -uUSERNAME -pPASSWORD database | gzip > /path/to/db/files/db-backup-`d
ate +%Y-%m-%d`.sql.gz ;find /path/to/db/files/* -mtime +5 -exec rm {} \;

# Get a MySQL DB dump from a remote machine
ssh user@host "mysqldump -h localhost -u mysqluser -pP@$$W3rD databasename | gzi
p -cf" | gunzip -c > database.sql

# Transfer sqlite3 data to mysql
sqlite3 mydb.sqlite3 '.dump' | grep -vE '^(BEGIN|COMMIT|CREATE|DELETE)|"sqlite_s
equence"' | sed -r 's/"([^"]+)"/`\1`/' | tee mydb.sql | mysql -p mydb

# Determine configure options used for MySQL binary builds
grep CONFIG $(which mysqlbug)

# Determine configure options used for MySQL binary builds
cat `whereis mysqlbug | awk '{print $2}'` | grep 'CONFIGURE_LINE='

# Explanation of system and MySQL error codes
perror NUMBER

# positions the mysql slave at a specific master position
slave start; SELECT MASTER_POS_WAIT('master.000088','8145654'); slave stop;

# raw MySQL output to use in pipes
mysql DATABASE -N -s -r -e 'SQL COMMAND'

# Passwordless mysql{,dump,admin} via my.cnf file
echo -e "[client]\nuser = YOURUSERNAME\npassword = YOURPASSWORD" > ~/.my.cnf

# Load multiple sql script in mysql
cat schema.sql data.sql test_data.sql | mysql -u user --password=pass dbname

# Convert all MySQL tables and fields to UTF8
mysql --database=dbname -B -N -e "SHOW TABLES"  | awk '{print "ALTER TABLE", $1,
 "CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;"}' | mysql --database=d
bname &

# Monitor server load as well as running MySQL processes
watch -n 1 uptime\;myqladmin --user=<user> --password=<password> --verbose proce
sslist

# Backup a remote database to your local filesystem
ssh user@host 'mysqldump dbname | gzip' > /path/to/backups/db-backup-`date +%Y-%
m-%d`.sql.gz

# Monitor the queries being run by MySQL
watch -n 1 mysqladmin --user=<user> --password=<password> processlist


#:14#
# commandlinefu.com by David Winterbottom

# Batch image resize
for a in `ls`; do echo $a && convert $a -resize <Width>x<Height> $a; done

# Find corrupted jpeg image files
find . -name "*jpg" -exec jpeginfo -c {} \; | grep -E "WARNING|ERROR"

# sync a directory of corrupted jpeg with a source directory
for i in *jpg; do jpeginfo -c $i | grep -E "WARNING|ERROR" | cut -d " " -f 1 | x
args -I '{}' find /mnt/sourcerep -name {} -type f -print0 | xargs -0 -I '{}' cp
-f {} ./ ; done

# Add a shadow to picture
convert {$file_in} \( +clone -background black -shadow 60x5+10+10 \) +swap -back
ground none -layers merge +repage  {$file_out}

# Scale,Rotate, brightness, contrast,...with Image Magick
convert -rotate $rotate -scale $Widthx$Height -modulate $brightness -contrast $c
ontrast -colorize $red%,$green%,$blue% $filter file_in.png file_out.png

# Use ImageMagick to get an image's properties
identify -ping imageName.png

# Determine an image's dimensions
identify -format "%wx%h" /path/to/image.jpg


#:15#
# commandlinefu.com by David Winterbottom

# Display summary of git commit ids and messages for a given branch
git log --pretty='format:%Cgreen%H %Cred%ai %Creset- %s'

# Display summary of git commit ids and messages for a given branch
git log master | awk '/commit/ {id=$2} /\s+\w+/ {print id, $0}'


#:16#
# commandlinefu.com by David Winterbottom

# Display all readline binding that use CTRL
bind -p | grep -F "\C"


#:17#
# commandlinefu.com by David Winterbottom

# DVD to YouTube ready watermarked MPEG-4 AVI file using mencoder (step 2)
mencoder -sub heading.ssa -subpos 0 -subfont-text-scale 4 -utf8 -oac copy -ovc l
avc -lavcopts vcodec=mpeg4 -vf scale=320:-2,expand=:240:::1 -ffourcc xvid -o out
put.avi dvd.avi

# DVD to YouTube ready watermarked MPEG-4 AVI file using mencoder (step 1)
mencoder -oac mp3lame -lameopts cbr=128 -ovc lavc -lavcopts vcodec=mjpeg -o dvd.
avi dvd://0

# Convert a MOV captured from a digital camera to a smaller AVI
ffmpeg -i input.mov -b 4096k -vcodec msmpeg4v2 -acodec pcm_u8 output.avi

# Rip DVD to YouTube ready MPEG-4 AVI file using mencoder
mencoder -oac mp3lame -lameopts cbr=128 -ovc lavc -lavcopts vcodec=mpeg4 -ffourc
c xvid -vf scale=320:-2,expand=:240:::1 -o output.avi dvd://0

# Get the total length of all video / audio in the current dir (and below) in H:
m:s
find -type f -name "*.avi" -print0 | xargs -0  mplayer -vo dummy -ao dummy -iden
tify 2>/dev/null | perl -nle '/ID_LENGTH=([0-9\.]+)/ && ($t +=$1) && printf "%02
d:%02d:%02d\n",$t/3600,$t/60%60,$t%60' | tail -n 1

# Use heading subtitle file as watermark using mencoder
mencoder -sub heading.ssa -subpos 0 -subfont-text-scale 4 -utf8 -oac mp3lame -la
meopts cbr=128 -ovc lavc -lavcopts vcodec=mjpeg -vf scale=320:-2,expand=:240:::1
 -o output.avi input.flv

# View webcam output using GStreamer pipeline
gst-launch-0.10 autovideosrc ! video/x-raw-yuv,framerate=\(fraction\)30/1,width=
640,height=480 ! ffmpegcolorspace ! autovideosink

# Record audio and video from webcam using mencoder
mencoder tv:// -tv driver=v4l2:width=800:height=600:device=/dev/video0:fps=30:ou
tfmt=yuy2:forceaudio:alsa:adevice=hw.2,0 -ovc lavc -lavcopts vcodec=mpeg4:vbitra
te=1800 -ffourcc xvid -oac mp3lame -lameopts cbr=128 -o output.avi

# View webcam output using mplayer
mplayer tv:// -tv driver=v4l2:width=640:height=480:device=/dev/video0:fps=30:out
fmt=yuy2

# Record audio and video from webcam using ffmpeg
ffmpeg -f alsa -r 16000 -i hw:2,0 -f video4linux2 -s 800x600 -i /dev/video0 -r 3
0 -f avi -vcodec mpeg4 -vtag xvid -sameq -acodec libmp3lame -ab 96k output.avi

# Extract audio track from a video file using mencoder
mencoder -of rawaudio -ovc copy -oac mp3lame -o output.mp3 input.avi

# Substitute audio track of video file using mencoder
mencoder -ovc copy -audiofile input.mp3 -oac copy input.avi -o output.avi

# Remove sound from video file using mencoder
mencoder -ovc copy -nosound input.avi -o output.avi

# FLV to AVI with subtitles and forcing audio sync using mencoder
mencoder -sub subs.ssa -utf8 -subfont-text-scale 4 -oac mp3lame -lameopts cbr=12
8 -ovc lavc -lavcopts vcodec=mpeg4 -ffourcc xvid -o output.avi input.flv

# Convert a VMWare screencast into a flv file
mencoder -of avi -ovc lavc movie.avi -o movie2.avi; ffmpeg -i movie2.avi -r 12
-b 100 movie.flv

# Record a webcam output into a video file.
ffmpeg -an -f video4linux -s 320x240 -b 800k -r 15 -i /dev/v4l/video0 -vcodec mp
eg4 myvideo.avi

# Encode a file to MPEG4 format
mencoder video.avi lavc -lavcopts vcodec=mpeg4:vbitrate=800 newvideo.avi

# Record camera's output to a avi file
mencoder -tv device=/dev/video1 tv:// -ovc copy -o video.avi

# Record a screencast and convert it to an mpeg
ffmpeg -f x11grab -r 25 -s 800x600 -i :0.0 /tmp/outputFile.mpg

# extracting audio and video from a movie
ffmpeg -i source_movie.flv -vcodec mpeg2video target_video.m2v -acodec copy targ
et_audio.mp3

# removing syncronization problems between audio and video
ffmpeg -i source_audio.mp3 -itsoffset 00:00:10.2 -i source_video.m2v target_vide
o.flv

# Create a video that is supported by youtube
ffmpeg -i mymovie.mpg -ar 22050 -acodec libmp3lame -ab 32K -r 25 -s 320x240 -vco
dec flv mytarget.flv

# Copy the sound content of a video to an mp3 file
ffmpeg -i source.flv -vn acodec copy destination.mp3

# Find your graphics chipset
lspci |grep VGA

# play high-res video files on a slow processor
mplayer -framedrop -vfm ffmpeg -lavdopts lowres=1:fast:skiploopfilter=all


#:18#
# commandlinefu.com by David Winterbottom


#:19#
# commandlinefu.com by David Winterbottom

# Update Ping.fm status
curl -d api_key="$api_key" -d user_app_key="$user_app_key -d body="$body" -d pos
t_method="default" http://api.ping.fm/v1/user.post

# Watching Command
watch 'cat /proc/loadavg'


#:20#
# commandlinefu.com by David Winterbottom


#:21#
# commandlinefu.com by David Winterbottom

# FAST and NICE Search and Replace for Strings in Files
nice -n19 sh -c 'S=askapache && R=htaccess; find . -type f|xargs -P5 -iFF grep -
l -m1 "$S" FF|xargs -P5 -iFF sed -i -e s%${S}%${R}% FF'


#:22#
# commandlinefu.com by David Winterbottom

# Prints per-line contribution per author for a GIT repository
git ls-files | while read i; do git blame $i | sed -e 's/^[^(]*(//' -e 's/^\([^[
:digit:]]*\)[[:space:]]\+[[:digit:]].*/\1/'; done | sort | uniq -ic | sort -nr

# Prints per-line contribution per author for a GIT repository
git ls-files | xargs -n1 -d'\n' -i git-blame {} | perl -n -e '/\s\((.*?)\s[0-9]{
4}/ && print "$1\n"' | sort -f | uniq -c -w3 | sort -r

# Awk: Perform a rolling average on a column of data
awk 'BEGIN{size=5} {mod=NR%size; if(NR<=size){count++}else{sum-=array[mod]};sum+
=$1;array[mod]=$1;print sum/count}' file.dat

# dstat - a mix of vmstat, iostat, netstat, ps, sar...
dstat -ta


#:23#
# commandlinefu.com by David Winterbottom


#:24#
# commandlinefu.com by David Winterbottom


#:25#
# commandlinefu.com by David Winterbottom


#:26#
# commandlinefu.com by David Winterbottom

# DVD to YouTube ready watermarked MPEG-4 AVI file using mencoder (step 1)
mencoder -oac mp3lame -lameopts cbr=128 -ovc lavc -lavcopts vcodec=mjpeg -o dvd.
avi dvd://0

# Create an audio test CD of sine waves from 1 to 99 Hz
(echo CD_DA; for f in {01..99}; do echo "$f Hz">&2; sox -nt cdda -r44100 -c2 $f.
cdda synth 30 sine $f; echo TRACK AUDIO; echo FILE \"$f.cdda\" 0; done) > cdrdao
.toc && cdrdao write cdrdao.toc && rm ??.cdda cdrdao.toc

# Get the total length of all video / audio in the current dir (and below) in H:
m:s
find -type f -name "*.avi" -print0 | xargs -0  mplayer -vo dummy -ao dummy -iden
tify 2>/dev/null | perl -nle '/ID_LENGTH=([0-9\.]+)/ && ($t +=$1) && printf "%02
d:%02d:%02d\n",$t/3600,$t/60%60,$t%60' | tail -n 1

# Record MP3 audio via ALSA using ffmpeg
ffmpeg -f alsa -ac 2 -i hw:1,0 -acodec libmp3lame -ab 96k output.mp3

# Record audio and video from webcam using ffmpeg
ffmpeg -f alsa -r 16000 -i hw:2,0 -f video4linux2 -s 800x600 -i /dev/video0 -r 3
0 -f avi -vcodec mpeg4 -vtag xvid -sameq -acodec libmp3lame -ab 96k output.avi

# Extract audio from Mythtv recording to Rockbox iPod using ffmpeg
ffmpeg -ss 0:58:15 -i DavidLettermanBlackCrowes.mpg -acodec copy DavidLettermanB
lackCrowes.ac3

# extracting audio and video from a movie
ffmpeg -i source_movie.flv -vcodec mpeg2video target_video.m2v -acodec copy targ
et_audio.mp3

# removing syncronization problems between audio and video
ffmpeg -i source_audio.mp3 -itsoffset 00:00:10.2 -i source_video.m2v target_vide
o.flv

# Create a video that is supported by youtube
ffmpeg -i mymovie.mpg -ar 22050 -acodec libmp3lame -ab 32K -r 25 -s 320x240 -vco
dec flv mytarget.flv

# Copy the sound content of a video to an mp3 file
ffmpeg -i source.flv -vn acodec copy destination.mp3

# create an mp3 with variable bitrate
lame -h -V 6 track9.wav track9.mp3

# Extract track 9 from a CD
mplayer -fs cdda://9 -ao pcm:file=track9.wav

# Record live sound in Vorbis (eg for bootlegs or to take audio notes)
rec -c 2 -r 44100 -s -t wav - | oggenc -q 5 --raw --raw-chan=2 --raw-rate=44100
--raw-bits=16 - > MyLiveRecording.ogg

# covert m4a audio files to wav
find . -name '*.m4a' | xargs -I audiofile mplayer -ao pcm "audiofile" -ao pcm:fi
le="audiofile.wav"

# Split lossless audio (ape, flac, wav, wv) by cue file
cuebreakpoints <cue file> | shnsplit -o <lossless audio type> <audio file>

# Downsample mp3s to 128K
for f in *.mp3 ; do lame --mp3input -b 128 "$f" ./resamp/"$f" ; done

# Random play a mp3 file
mpg123 "`locate -r '\.mp3$'|awk '{a[NR]=$0}END{print a['"$RANDOM"' % NR]}'`"

# batch convert OGG to WAV
for f in *.ogg ; do mplayer -quiet -vo null -vc dummy -ao pcm:waveheader:file="$
f.wav" "$f"  ; done

# sets volume via command line
amixer -c 0 set PCM 2dB+


#:27#
# commandlinefu.com by David Winterbottom

# Randomize lines (opposite of | sort)
perl -wl -e '@f=<>; for $i (0 .. $#f) { $r=int rand ($i+1); @f[$i, $r]=@f[$r,$i]
 if ($i!=$r); } chomp @f; print join $/, @f;' try.txt

# Randomize lines (opposite of | sort)
random -f <file>

# Randomize lines (opposite of | sort)
cat ~/SortedFile.txt | perl -wnl -e '@f=<>; END{ foreach $i (reverse 0 .. $#f) {
 $r=int rand ($i+1); @f[$i, $r]=@f[$r,$i] unless ($i==$r); }  chomp @f; foreach
$line (@f){ print $line; }}'

# Execute text from the OS X clipboard.
`pbpaste` | pbcopy

# Find all PowerPC applications on OS X
system_profiler SPApplicationsDataType | perl -nl -e  '@al=<>; $c=@al; while($j<
$c){ $apps[$i].=$al[$j]; $i++ if ($al[$j] ) =~ /^\s\s\s\s\S.*:$/; $j++} while($k
<$i){ $_=$apps[$k++]; if (/Kind: PowerPC/s) {print;}}'

# On Mac OS X, runs System Profiler Report and e-mails it to specified address.
system_profiler | mail -s "$HOSTNAME System Profiler Report" user@domain.com

# Printing multiple years with Unix cal command
for y in 2009 2010 2011; do cal $y; done

# Throttling Bandwidth On A Mac
sudo ipfw pipe 1 config bw 50KByte/s;sudo ipfw add 1 pipe 1 src-port 80

# get linkspeed, ip-adress, mac-address and processor type from osx
echo "-------------" >> nicinfo.txt; echo "computer name x" >> nicinfo.txt; ifco
nfig | grep status >> nicinfo.txt; ifconfig | grep inet >> nicinfo.txt; ifconfig
 | grep ether >> nicinfo.txt; hostinfo | grep type >> nicinfo.txt;

# Adobe Updater Crashes on Mac OS X Fix
sudo /Applications/Utilities/Adobe\ Utilities.localized/Adobe\ Updater5/Adobe\ U
pdater.app/Contents/MacOS/Adobe\ Updater

# Show live HTTP requests being made on OS X
sudo tcpdump -i en1 -n -s 0 -w - | grep -a -o -E "Host\: .*|GET \/.*"

# Listen to the OS X system's voices
for person in Alex Bruce Fred Kathy Vicki Victoria ; do say -v $person "Hello, m
y name is $person"; sleep 1; done

# Remove annoying OS X DS_Store folders
find . -name .DS_Store -exec rm {} \;

# Show hidden files in OS X
defaults write com.apple.Finder AppleShowAllFiles TRUE

# Make a DVD ISO Image from a VIDEO_TS folder on MacOSX
hdiutil makehybrid -udf -udf-volume-name DVD_NAME -o MY_DVD.iso /path/

# Create an ISO Image from a folder and burn it to CD
hdiutil makehybrid -o CDname.iso /Way/to/folder ; hdiutil burn CDname.iso

# shows how much space from how much space is free on your drive(s)
df -h |  sed -e '/disk/b' -e '/Volumes/b' -e d | awk '{print $3, "of", $2, "occu
pied,", $4, "free", "at", $6}'

# make a zip file containing all files with the openmeta tag "data"
mdfind "tag:data" > /tmp/data.txt ; zip -r9@ ~/Desktop/data.zip < /tmp/data.txt

# convert a pdf to jpeg
sips -s format jpeg Bild.pdf --out Bild.jpg

# read manpage of a unix command as pdf in preview (Os X)
man -t UNIX_COMMAND | open -f -a preview

# Copy All mp3 files in iTunes into one folder (Example: Music on Desktop) (Os X
)
find ~/Music/iTunes/ -name *.mp3 -exec cp {} ~/Desktop/Music/  \;


#:28#
# commandlinefu.com by David Winterbottom

# generate random password
openssl rand -base64 1000 | tr "[:upper:]" "[:lower:]" | tr -cd "[:alnum:]" | tr
 -d "lo" | cut -c 1-8 | pbcopy

# Remove security limitations from PDF documents using ghostscript
gs -q -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=OUTPUT.pdf -c .setpdfwrit
e -f INPUT.pdf

# generate random password
openssl rand -base64 6

# generate random password
pwgen -Bs 10 1

# Remove an IP address ban that has been errantly blacklisted by denyhosts
denyhosts-remove $IP_ADDRESS

# Quickly Encrypt a file with gnupg and email it with mailx
cat private-file | gpg2 --encrypt --armor --recipient "Disposable Key" | mailx -
s "Email Subject" user@email.com

# generate a unique and secure password for every website that you login to
sitepass() { echo -n "$@" |  md5sum | sha1sum | sha224sum | sha256sum | sha384su
m | sha512sum | gzip - | strings -n 1 | tr -d "[:space:]"  | tr -s '[:print:]' |
 tr '!-~' 'P-~!-O' | rev | cut -b 2-11; history -d $(($HISTCMD-1)); }

# rkhunter (Rootkit Hunter) is a Unix-based tool that scans for rootkits, backdo
ors and possible local exploits. rkhunter is a shell script which carries out va
rious checks on the local system to try and detect known rootkits and malware. I
t also performs c
rkhunter --check

# Check the backdoors and security.chkrootkit is a tool to locally check for sig
ns of a rootkit.
chkrootkit -x | less

# How to check webserver by Nikto
nikto.pl -h yourwebserver

# Securely edit the sudo file over the network
visudo

# Securely look at the group file over the network
vigr

# Securely seeing the password file over the network
vipw

# add static arp entry to default gateway, arp poison protection
arp -s $(route -n | awk '/^0.0.0.0/ {print $2}') \ $(arp -n | grep `route -n | a
wk '/^0.0.0.0/ {print $2}'`| awk '{print $3}')

# Brute force discover
sudo zcat /var/log/auth.log.*.gz | awk '/Failed password/&&!/for invalid user/{a
[$9]++}/Failed password for invalid user/{a["*" $11]++}END{for (i in a) printf "
%6s\t%s\n", a[i], i|"sort -n"}'

# Quickly generate an MD5 hash for a text string using OpenSSL
echo -n 'text to be encrypted' | openssl md5

# Drop or block attackers IP with null routes
sudo route add xxx.xxx.xxx.xxx gw 127.0.0.1 lo


#:29#
# commandlinefu.com by David Winterbottom

# A bit of privacy in .bash_history
export HISTCONTROL=ignoreboth

# exit without saving history
kill -9 $$

# find the longest command in your history
history | perl -lane '$lsize{$_} = scalar(@F); if($longest<$lsize{$_}) { $longes
t = $lsize{$_}; print "$_"; };' | tail -n1

# Clear current session history
history -r


#:30#
# commandlinefu.com by David Winterbottom

# convert strings toupper/tolower with tr
echo "aBcDeFgH123" | tr a-z A-Z

# uppercase
tr [a-z] [A-Z]


#:31#
# commandlinefu.com by David Winterbottom

# Randomize lines (opposite of | sort)
perl -wl -e '@f=<>; for $i (0 .. $#f) { $r=int rand ($i+1); @f[$i, $r]=@f[$r,$i]
 if ($i!=$r); } chomp @f; print join $/, @f;' try.txt

# count and number lines of output, useful for counting number of matches
ps aux | grep [h]ttpd | cat -n

# Send a local file via email
{ echo -e "$body"; uuencode "$outfile" "$outfile"; } | mail -s "$subject" "$dest
addr" ;

# prints line numbers
cat -n

# Get the time from NIST.GOV
cat </dev/tcp/time.nist.gov/13

# Checks apache's access_log file, strips the search queries and shoves them up
your e-mail
cat /var/log/httpd/access_log | grep q= | awk '{print $11}' | awk -F 'q=' '{prin
t $2}' | sed 's/+/ /g;s/%22/"/g;s/q=//' | cut -d "&" -f 1 | mail youremail@isp.c
om -s "[your-site] search strings for `date`"

# Make an iso file out of your entire hard drive
dd if=/dev/hda of=file.img

# Make an iso file out of your entire hard drive
cat /dev/hda > ~/hda.iso

# Randomize lines (opposite of | sort)
random -f <file>

# Randomize lines (opposite of | sort)
cat ~/SortedFile.txt | perl -wnl -e '@f=<>; END{ foreach $i (reverse 0 .. $#f) {
 $r=int rand ($i+1); @f[$i, $r]=@f[$r,$i] unless ($i==$r); }  chomp @f; foreach
$line (@f){ print $line; }}'

# Send a local file via email
cat filename | uuencode filename | mail -s "Email subject" user@example.com

# Send a local file via email
cat filename | mail -s "Email subject" user@example.com

# Remove newlines from output
cat filename | grep .

# Count all conections estabilished on gateway
cat /proc/net/ip_conntrack | grep ESTABLISHED | grep -c -v ^#

# Sorting by rows
infile=$1 for i in $(cat $infile) do     echo $i | tr "," "\n" | sort -n | tr "\
n" "," | sed "s/,$//"    echo done

# Outputs files with ascii art in the intended form.
iconv -f437 -tutf8 asciiart.nfo

# View non-printing characters with cat
cat -v -t -e

# Load multiple sql script in mysql
cat schema.sql data.sql test_data.sql | mysql -u user --password=pass dbname

# Browse system RAM in a human readable form
sudo cat /proc/kcore | strings | awk 'length > 20' | less

# Type strait into a file from the terminal.
cat /dev/tty > FILE


#:32#
# commandlinefu.com by David Winterbottom

# live ssh network throughput test
pv /dev/zero|ssh $host 'cat > /dev/null'

# analyze traffic remotely over ssh w/ wireshark
mkfifo /tmp/fifo; ssh-keygen; ssh-copyid root@remotehostaddress; sudo ssh root@r
emotehost "tshark -i eth1 -f 'not tcp port 22' -w -" > /tmp/fifo &; sudo wiresha
rk -k -i /tmp/fifo;

# analyze traffic remotely over ssh w/ wireshark
sudo ssh -Y remoteuser@remotehost sudo wireshark

# live ssh network throughput test
yes | pv | ssh $host "cat > /dev/null"

# analyze traffic remotely over ssh w/ wireshark
ssh root@server.com 'tshark -f "port !22" -w -' | wireshark -k -i -

# Harder, Faster, Stronger SSH clients
ssh -4 -C -c blowfish-cbc

# Remove an IP address ban that has been errantly blacklisted by denyhosts
denyhosts-remove $IP_ADDRESS

# Copy a folder tree through ssh using compression (no temporary files)
ssh <host> 'tar -cz /<folder>/<subfolder>' | tar -xvz

# Get ssh server fingerprints
ssh-keygen -l -f /etc/ssh/ssh_host_rsa_key.pub && ssh-keygen -l -f /etc/ssh/ssh_
host_dsa_key.pub

# Dump dvd from a different machine onto this one.
ssh user@machine_A dd if=/dev/dvd0 > dvddump.iso

# Identify differences between directories (possibly on different servers)
diff <(ssh server01 'cd config; find . -type f -exec md5sum {} \;| sort -k 2') <
(ssh server02 'cd config;find . -type f -exec md5sum {} \;| sort -k 2')

# How to run a command on a list of remote servers read from a file
dsh -M -c -f servers -- "command HERE"

# How to run a specific command in remote server by ssh
ssh user@remotehost [anycommand](i.e uptime,w)

# scp a good script from host A which has no public access to host C, but with a
 hop by host B
ssh middlehost "ssh -a root@securehost '> nicescript'" < nicescript

# Echo the local IP addresses of the machines on your local network
for i in 192.168.1.{61..71};do ping -c 1 $i &> /dev/null && echo $i;fi;done

# move a lot of files over ssh
rsync -az /home/user/test user@sshServer:/tmp/

# scp a good script from host A which has no public access to host C, but with a
 hop by host B
cat nicescript |ssh middlehost "cat | ssh -a root@securehost 'cat > nicescript'"

# move a lot of files over ssh
tar -cf - /home/user/test | gzip -c | ssh user@sshServer 'cd /tmp; tar xfz -'

# from the console, start a second X server
xinit -- :1

# Attach screen over ssh
ssh -t remote_host screen -r

# Paste OS X clipboard contents to a file on a remote machine
pbpaste | ssh user@hostname 'cat > ~/my_new_file.txt'

# clone a hard drive to a remote directory via ssh tunnel, and compressing the i
mage
# dd if=/dev/sda | gzip -c | ssh user@ip 'dd of=/mnt/backups/sda.dd'

# Connect to google talk through ssh by setting your IM client to use the localh
ost 5432 port
ssh -f -N -L 5432:talk.google.com:5222 user@home.network.com

# Setup an ssh tunnel
ssf -f -N -L 4321:home.network.com:25 user@home.network.com

# Ultra shortcut for ssh root@
alias s='ssh -l root'


#:33#
# commandlinefu.com by David Winterbottom

# Type strait into a file from the terminal.
cat /dev/tty > FILE


#:34#
# commandlinefu.com by David Winterbottom

# Rename .JPG to .jpg recursively
find /path/to/images -name '*.JPG' -exec bash -c 'mv "$1" "${1/%.JPG/.jpg}"' --
{} \;

# Show git branches by date - useful for showing active branches
for k in `git branch|sed s/^..//`;do echo -e `git log -1 --pretty=format:"%Cgree
n%ci %Cblue%cr%Creset" "$k"`\\t"$k";done|sort

# Do a search-and-replace in a file after making a backup
sed -i.bak 's/old/new/g' file

# Press Any Key to Continue
read enterKey

# Write and run a quick C program
cat | gcc -x c -o a.out - && ./a.out && rm a.out

# Find the location of the currently loaded php.ini file
php -i | grep php.ini

# display embeded comments for every --opt, usefull for auto documenting your sc
ript
vim -n -es -c 'g/# CommandParse/+2,/^\s\+esac/-1 d p | % d | put p | %<' -c 'g/^
\([-+]\+[^)]\+\))/,/^\(\s\+[^- \t#]\|^$\)/-1 p' -c 'q!' $0

# p is for pager
p() { l=$LINES; case $1 in do) shift; IFS=$'\n' _pg=( $("$@") ) && _pgn=0 && p r
;;   r) echo "${_pg[*]:_pgn:$((l-4))}";;   d) (( _pgn+=l-4 )); (( _pgn=_pgn>=${#
_pg[@]}?${#_pg[@]}-l+4:_pgn )); p r;;   u) (( _pgn=_pgn<=l-4?0:_pgn-$l-4 )); p r
;; esac; }

# bash screensaver (scrolling ascii art with customizable message)
while [ 1 ]; do banner 'ze missiles, zey are coming! ' | while IFS="\n" read l;
do echo "$l"; sleep 0.01; done; done

# Duplicate several drives concurrently
dd if=/dev/sda | tee >(dd of=/dev/sdb) | dd of=/dev/sdc

# prints line numbers
while read str; do echo "$((++i)) - $str"; done < infile

# Ruby - nslookup against a list of IP`s or FQDN`s
while read n; do host $n; done < list

# Return IP Address
perl -e '$_=`ifconfig eth0`;/\d+.\d+.\d+.\d+ /; print $&,"\n";'

# Return IP Address
ifconfig|while read i;do [[ $i =~ inet.*B ]]&&r=${i%%B*}&&echo ${r/*[tr]:/};done

# View the newest xkcd comic.
wget `lynx --dump http://xkcd.com/|grep png`

# View the newest xkcd comic.
lynx --dump --source http://www.xkcd.com | grep `lynx --dump http://www.xkcd.com
 | egrep '(png|jpg)'` | grep title | cut -d = -f2,3 | cut -d '"' -f2,4 | sed -e
's/"/|/g' | awk -F"|" ' { system("display " $1);system("echo "$2); } '

# Pipe stdout and stderr, etc., to separate commands
some_command > >(/bin/cmd_for_stdout) 2> >(/bin/cmd_for_stderr)

# set your ssd disk as a non-rotating medium
sudo echo 0 > /sys/block/sdb/queue/rotational

# find read write traffic on disk since startup
iostat -m -d /dev/sda1

# View the newest xkcd comic.
xkcd(){ local f=$(curl -s http://xkcd.com/);display $(echo "$f"|grep -Po '(?<=")
http://imgs.xkcd.com/comics/[^"]+(png|jpg)');echo "$f"|awk '/<img src="http:\/\/
imgs\.xkcd\.com\/comics\/.*?" title=.*/{gsub(/^.*title=.|".*?$/,"");print}';}

# Use colordiff in side-by-side mode, and with automatic column widths.
colordiff -yW"`tput cols`" /path/to/file1 /path/to/file2

# Get your bash scripts to handle options (-h, --help etc) and spit out auto-for
matted help or man page when asked!!
process-getopt

# urldecoding
printf $(echo -n $1 | sed 's/\\/\\\\/g;s/\(%\)\([0-9a-fA-F][0-9a-fA-F]\)/\\x\2/g
')

# Convert decimal numbers to binary
function decToBin { echo "ibase=10; obase=2; $1" | bc; }

# Checks apache's access_log file, strips the search queries and shoves them up
your e-mail
awk '/q=/{print $11}' /var/log/httpd/access_log.4 | awk -F 'q=' '{print $2}' | s
ed 's/+/ /g;s/%22/"/g;s/q=//' | cut -d "&" -f 1


#:35#
# commandlinefu.com by David Winterbottom

# Find files recursively that were updated in the last hour ignoring SVN files a
nd folders.
find . -mmin -60 -not -path "*svn*" -print|more

# Commit only newly added files to subversion repository
svn ci `svn stat |awk '/^A/{printf $2" "}'`

# Get last changed revision to all eclipse projects in a SVN working copy
find . -iname ".project"| xargs -I {} dirname {} | LC_ALL=C xargs -I {} svn info
 {} | grep "Last Changed Rev\|Path" | sed "s/Last Changed Rev: /;/" | sed "s/Pat
h: //" | sed '$!N;s/\n//'

# Archive all SVN repositories in platform indepenent form
budir=/tmp/bu.$$;for name in repMainPath/*/format;do dir=${name%/format};bufil=d
umpPath/${dir##*/};svnadmin hotcopy --clean-logs $dir $budir;svnadmin dump --del
ta $budir>$bufil;rm -rf $budir;done

# Archive all SVN repositories in platform indepenent form
find repMainPath -maxdepth 1 -mindepth 1 -type d | while read dir; do echo proce
ssing $dir; sudo svnadmin dump --deltas $dir >dumpPath/`basename $dir`; done

# Create a zip file ignoring .svn files
zip -r foo.zip DIR -x "*/.svn/*"

# Create a zip file ignoring .svn files
find . -not \( -name .svn -prune \) -type f | xargs zip XXXXX.zip

# get colorful side-by-side diffs of files in svn with vim
vimdiff <(svn cat "$1") "$1"

# Skip over .svn directories when using the
find . -name .svn -prune -o -print

# fetch all revisions of a specific file in an SVN repository
svn log fileName | sed -ne "/^r\([0-9][0-9]*\).*/{;s//\1/;s/.*/svn cat fileName@
& > fileName.r&/p;}" | sh -s

# use vim to get colorful diff output
svn diff | view -

# Prints total line count contribution per user for an SVN repository
svn ls -R | egrep -v -e "\/$" | xargs svn blame | awk '{print $2}' | sort | uniq
 -c | sort -r

# Colored SVN diff
svn diff <file> | vim -R -

# gets all files committed to svn by a particular user since a particular date
svn log -v -r{2009-05-21}:HEAD | awk '/^r[0-9]+ / {user=$3} /yms_web/ {if (user=
="george") {print $2}}' | sort | uniq

# Find chronological errors or bad timestamps in a Subversion repository
URL=http://svn.example.org/project; diff -u <(TZ=UTC svn -q log -r1:HEAD $URL |
grep \|) <(TZ=UTC svn log -q $URL | grep \| | sort -k3 -t \|)

# Check syntax of all PHP files before an SVN commit
for i in `svn status | egrep '^(M|A)' | sed -r 's/\+\s+//' | awk '{ print $2 }'`
 ; do if [ ! -d $i ] ; then php -l $i ; fi ; done

# fetch all revisions of a specific file in an SVN repository
svn log fileName|cut -d" " -f 1|grep -e "^r[0-9]\{1,\}$"|awk {'sub(/^r/,"",$1);p
rint "svn cat fileName@"$1" > /tmp/fileName.r"$1'}|sh

# Skip over .svn directories when using the "find" command.
find . -not \( -name .svn -prune \)

# Remove all .svn folders inside a folder
find . -name "\.svn" -exec rm -rf {} ";"

# Recursively Add Changed Files to Subversion
svn status | grep "^\?" | awk '{print $2}' | xargs svn add

# sync svn working copy and remote repository (auto adding new files)
svn status | grep '^?' | awk '{ print $2; }' | xargs svn add

# Get the current svn branch/tag (Good for PS1/PROMPT_COMMAND cases)
svn info | grep '^URL:' | egrep -o '(tags|branches)/[^/]+|trunk' | egrep -o '[^/
]+$'

# Tar a subversion working copy...without all those hidden directories!
tar --exclude='.svn' -c -f /path/to/file.tar /path/to/directory

# Have subversion ignore a file pattern in a directory
svn propset svn:ignore "*txt" log/

# SVN Command line branch merge
/usr/local/bin/svn merge -r {rev_num}:HEAD https://{host}/{project}/branches/{br
anch_name} .


#:36#
# commandlinefu.com by David Winterbottom

# Colored diff ( via vim ) on 2 remotes files on your local computer.
vimdiff scp://root@server-foo.com//etc/snmp/snmpd.conf scp://root@server-bar.com
//etc/snmp/snmpd.conf

# command! -nargs=1 Vs vs &lt;args&gt;
Create aliases for common vim minibuffer/cmd typos

# display embeded comments for every --opt, usefull for auto documenting your sc
ript
vim -n -es -c 'g/# CommandParse/+2,/^\s\+esac/-1 d p | % d | put p | %<' -c 'g/^
\([-+]\+[^)]\+\))/,/^\(\s\+[^- \t#]\|^$\)/-1 p' -c 'q!' $0

# Know when you will type :q in your term instead of vi(m), the alias will chewe
d you out.
alias :q='tput setaf 1; echo >&2 "this is NOT vi(m) :/"; tput sgr0'

# alias to close terminal with :q
alias ':q'='exit'

# Edit your command in vim ex mode by &lt;ctrl-f&gt;
<ctrl-f> in ex mode in vim

# get colorful side-by-side diffs of files in svn with vim
vimdiff <(svn cat "$1") "$1"

# Edit all files found having a specific string found by grep
find . -type f -exec grep -qi 'foo' {} \; -print0 | xargs -0 vim

# Edit all files found having a specific string found by grep
find . -exec grep foobar /dev/null {} \; | awk -F: '{print $1}' | xargs vi

# Edit all files found having a specific string found by grep
grep -ir 'foo' * | awk -F '{print $1}' | xargs vim

# Edit all files found having a specific string found by grep
grep -Hrli 'foo' * | xargs vim

# Edit all files found having a specific string found by grep
grep -ir 'foo' * | awk '{print $1}' | sed -e 's/://' | xargs vim

# Display a block of text with vim with offset, like with AWK
vim -e -s -c 'g/start_pattern/+1,/stop_pattern/-1 p' -cq file.txt

# Emptying a text file in one shot in VIM
:!>test.txt

# Remove ^M characters at end of lines in vi
:%s/^V^M//g

# Emptying a text file in one shot
ggdG

# use vim to get colorful diff output
svn diff | view -

# Save a file you edited in vim without the needed permissions - (Open)solaris v
ersion with RBAC
:w !pfexec tee %

# Change the case of a single word in vim
g~w

# Find files containing string and open in vim
vim $(grep test *)

# VIM: Replace a string with an incrementing number between marks 'a and 'b (eg,
 convert string ZZZZ to 1, 2, 3, ...)
:let i=0 | 'a,'bg/ZZZZ/s/ZZZZ/\=i/ | let i=i+1

# vim display hex value char under cursor
ga

# open an url with opera webbrowser from vim
:!start c:\progra~1\Opera\opera.exe http://www.commandlinefu.com

# vim insert current filename
:r! echo %

# load changes without logging in and out vim
:source ~/.vimrc


#:37#
# commandlinefu.com by David Winterbottom

# Mount a Windows share on the local network (Ubuntu) with user rights and use a
 specific samba user
sudo mount -t cifs -o credentials=/path/to/credenials //hostname/sharename /moun
t/point

# Add the sbin directories to your PATH if it doesn't already exist in ZSH.
path+=( /sbin /usr/sbin /usr/local/sbin ); path=( ${(u)path} );

# Save a file you edited in vim without the needed permissions - (Open)solaris v
ersion with RBAC
:w !pfexec tee %

# Remove all files from the root
sudo rm -rf /*

# Mac Sleep Timer
sudo pmset schedule sleep "08/31/2009 00:00:00"

# automount samba shares as devices in /mnt/
sudo vi /etc/fstab; Go//smb-share/gino /mnt/place smbfs defaults,username=gino,p
assword=pass 0 0<esc>:wq; mount //smb-share/gino

# Remove apps with style: nuke it from orbit
function nuke() { if [ $(whoami) != "root" ] ; then for x in $@; do sudo apt-get
 autoremove --purge $x; done; else for x in $@; do apt-get autoremove --purge $x
; done; fi }

# Basic Local Port Scan
[command too long]

# Execute a sudo command remotely, without displaying the password
stty -echo; ssh HOSTNAME "sudo some_command"; stty echo

# Save a file you edited in vim without the needed permissions
:w !sudo tee %


#:38#
# commandlinefu.com by David Winterbottom

# Duplicate several drives concurrently
dd if=/dev/sda | tee >(dd of=/dev/sdb) | dd of=/dev/sdc

# Both view and pipe the file without saving to disk
cat /path/to/some/file.txt | tee /dev/pts/0 | wc -l

# Run a bash script in debug mode, show output and save it on a file
bash -x test.sh 2>&1 | tee out.test

# Save a file you edited in vim without the needed permissions - (Open)solaris v
ersion with RBAC
:w !pfexec tee %

# bash or tcsh redirect both to stdout and to a file
echo "Hello World." | tee -a hello.txt

# Save a file you edited in vim without the needed permissions
:w !sudo tee %

# Add a line to a file using sudo
echo "foo bar" | sudo tee -a /path/to/some/file


#:39#
# commandlinefu.com by David Winterbottom

# Re-read partition table on specified device without rebooting system (here /de
v/sda).
blockdev --rereadpt /dev/sda


#:40#
# commandlinefu.com by David Winterbottom

# List your largest installed packages (on Debian/Ubuntu)
dpigs

# List your largest installed packages (on Debian/Ubuntu)
sed -ne '/^Package: \(.*\)/{s//\1/;h;};/^Installed-Size:  \(.*\)/{s//\1/;G;s/\n/
 /;p;}' /var/lib/dpkg/status | sort -rn

# List your largest installed packages (on Debian/Ubuntu)
perl -ne '$pkg=$1 if m/^Package: (.*)/; print "$1\t$pkg\n" if m/^Installed-Size:
 (.*)/;' < /var/lib/dpkg/status | sort -rn | less

# List your largest installed packages.
dpkg --get-selections | cut -f1 | while read pkg; do dpkg -L $pkg | xargs -I'{}'
 bash -c 'if [ ! -d "{}" ]; then echo "{}"; fi' | tr '\n' '\000' | du -c --files
0-from - | tail -1 | sed "s/total/$pkg/"; done

# Find running binary executables that were not installed using dpkg
cat /var/lib/dpkg/info/*.list > /tmp/listin ; ls /proc/*/exe |xargs -l readlink
| grep -xvFf /tmp/listin; rm /tmp/listin

# find files in $PATH that were not installed through dpkg
echo -e "${PATH//://\n}" >/tmp/allpath; grep -Fh -f /tmp/allpath /var/lib/dpkg/i
nfo/*.list|grep -vxh -f /tmp/allpath >/tmp/installedinpath ; find ${PATH//:/ } |
grep -Fxv -f /tmp/installedinpath

# Add
rename 's/^/prefix/' *

# Update program providing java on Debian
update-java-alternatives

# complete extraction of a debian-package
dpkg-deb -x $debfile $extractdir; dpkg-deb -e $debfile $extractdir/DEBIAN;

# Send pop-up notifications on Gnome
notify-send ["<title>"] "<body>"

# remove unneeded configuration files in debian
dpkg-query -l| grep -v "ii " | grep "rc " | awk '{print $2" "}' | tr -d "\n" | x
args aptitude purge -y

# Purge configuration files of removed packages on  debian based systems
sudo aptitude purge `dpkg --get-selections | grep deinstall | awk '{print $1}'`

# List your largest installed packages.
wajig large

# Find a file's package or list a package's contents.
dlocate [ package | string ]

# (Debian/Ubuntu) Discover what package a file belongs to
dpkg -S /usr/bin/ls

# Remove today's installed packages
grep "install " /var/log/dpkg.log | awk '{print $4}' | xargs apt-get -y remove -
-purge

# Generate a list of installed packages on Debian-based systems
dpkg --get-selections > LIST_FILE

# Install the Debian-packaged version of a Perl module
function dpan () { PKG=`perl -e '$_=lc($ARGV[0]); s/::/-/g; print "lib$_-perl\n"
' $1`; apt-get install $PKG; }

# Run a complete update unattended on Debian based GNU/Linux distros.
sudo apt-get update && sudo apt-get dist-upgrade -y

# Know which version dpkg/apt considers more recent
dpkg --compare-versions 1.0-2ubuntu5 lt 1.1-1~raphink3 && echo y || echo n

# Creates a minimalist xorg.conf
dpkg-reconfigure -phigh xserver-xorg

# Generate a graph of package dependencies
apt-cache dotty apache2 | dot -T png | display

# Update program providing a functionality on Debian
update-alternatives --config java


#:41#
# commandlinefu.com by David Winterbottom

# Batch image resize
for a in `ls`; do echo $a && convert $a -resize <Width>x<Height> $a; done

# Draw a Sierpinski triangle
perl -e 'print "P1\n256 256\n", map {$_&($_>>8)?1:0} (0..0xffff)' | display

# Add a shadow to picture
convert {$file_in} \( +clone -background black -shadow 60x5+10+10 \) +swap -back
ground none -layers merge +repage  {$file_out}

# Scale,Rotate, brightness, contrast,...with Image Magick
convert -rotate $rotate -scale $Widthx$Height -modulate $brightness -contrast $c
ontrast -colorize $red%,$green%,$blue% $filter file_in.png file_out.png

# Identify name and resolution of all jpgs in current directory
identify  -verbose *.jpg|grep "\(Image:\|Resolution\)"

# Use ImageMagick to get an image's properties
identify -ping imageName.png

# Quick screenshot
import -pause 5 -window root desktop_screenshot.jpg

# Create a favicon
convert -colors 256 -resize 16x16 face.jpg face.ppm && ppmtowinicon -output favi
con.ico face.ppm

# Create black and white image
convert -colorspace gray face.jpg gray_face.jpg

# Add calendar to desktop wallpaper
convert -font -misc-fixed-*-*-*-*-*-*-*-*-*-*-*-* -fill black -draw "text 270,26
0 \" `cal` \"" testpic.jpg newtestpic.jpg

# Convert images to a multi-page pdf
convert -adjoin -page A4 *.jpeg multipage.pdf

# Generate a graph of package dependencies
apt-cache dotty apache2 | dot -T png | display


#:42#
# commandlinefu.com by David Winterbottom

# Generate a graph of package dependencies
apt-cache dotty apache2 | dot -T png | display


#:43#
# commandlinefu.com by David Winterbottom

# Display _something_ when an X app fails
xlaunch(){ T=/tmp/$$;sh -c "$@" >$T.1 2>$T.2;S=$?;[ $S -ne 0 ]&&{ echo -e "'$@'
failed with error $S\nSTDERR:\n$(cat $T.2)\nSTDOUT:\n$(cat $T.1)\n"|xmessage -fi
le -;};rm -f $T.1 $T.2;}

# Typing the current date ( or any string ) via a shortcut as if the keys had be
en actually typed with the hardware keyboard in any application.
xvkbd -xsendevent -text $(date +%Y%m%d)

# from the console, start a second X server
xinit -- :1

# Send keypresses to an X application
xvkbd -xsendevent -text "Hello world"

# Creates a minimalist xorg.conf
dpkg-reconfigure -phigh xserver-xorg

# Generate a graph of package dependencies
apt-cache dotty apache2 | dot -T png | display

# Copy stdin to your X11 buffer
ssh user@host cat /path/to/some/file | xclip


#:44#
# commandlinefu.com by David Winterbottom

# Open a RemoteDesktop from terminal
rdesktop -a 16 luigi:3052

# Save VM running as headless
VBoxManage controlvm ServidorProducao savestate

# Running VirtualBox as headless
nohup VBoxHeadless -p 3052 -startvm ServidorProducao &

# set your ssd disk as a non-rotating medium
sudo echo 0 > /sys/block/sdb/queue/rotational

# convert wav files to flac
flac --best *.wav

# Clean up poorly named TV shows.
rename -v 's/.*[s,S](\d{2}).*[e,E](\d{2}).*\.avi/SHOWNAME\ S$1E$2.avi/' poorly.n
amed.file.s01e01.avi

# Disable beep sound from your computer
echo "blacklist pcspkr"|sudo tee -a /etc/modprobe.d/blacklist.conf

# Update program providing java on Debian
update-java-alternatives

# Resets your MAC to a random MAC address to make you harder to find.
ran=$(head /dev/urandom | md5sum); MAC=00:07:${ran:0:2}:${ran:3:2}:${ran:5:2}:${
ran:7:2}; sudo ifconfig wlan0 down hw ether $MAC; sudo ifconfig wlan0 up; echo i
fconfig wlan0:0

# Send pop-up notifications on Gnome
notify-send ["<title>"] "<body>"

# Find your graphics chipset
lspci |grep VGA

# Watch Network Service Activity in Real-time
lsof -i

# Set Time Zone in Ubuntu
sudo dpkg-reconfigure tzdata

# (Debian/Ubuntu) Discover what package a file belongs to
dpkg -S /usr/bin/ls

# Fix Ubuntu's Broken Sound Server
sudo killall -9 pulseaudio; pulseaudio >/dev/null 2>&1 &

# Generate a list of installed packages on Debian-based systems
dpkg --get-selections > LIST_FILE

# do a release upgrade in ubuntu
do-release-upgrade

# Move a file up a directory.
mv file_name.extension ..

# Basic Local Port Scan
[command too long]

# Prints new content of files
tail -f file1 (file2 .. fileN)

# Know which version dpkg/apt considers more recent
dpkg --compare-versions 1.0-2ubuntu5 lt 1.1-1~raphink3 && echo y || echo n

# Creates a minimalist xorg.conf
dpkg-reconfigure -phigh xserver-xorg

# Allows incoming traffic from specific IP address to port 80
sudo ufw allow proto tcp from 1.2.3.4 to any port 80

# Generate a graph of package dependencies
apt-cache dotty apache2 | dot -T png | display

# Update program providing a functionality on Debian
update-alternatives --config java


#:45#
# commandlinefu.com by David Winterbottom

# Quickly Encrypt a file with gnupg and email it with mailx
cat private-file | gpg2 --encrypt --armor --recipient "Disposable Key" | mailx -
s "Email Subject" user@email.com

# Function that outputs dots every second until command completes
sleeper(){ while `ps -p $1 &>/dev/null`; do echo -n "${2:-.}"; sleep ${3:-1}; do
ne; }; export -f sleeper

# Create Encrypted WordPress MySQL Backup without any DB details, just the wp-co
nfig.php
eval $(sed -e "s/^d[^D]*DB_\([NUPH]\).*',[^']*'\([^']*\)'.*/_\1='\2';/" -e "/^_/
!d" wp-config.php) && mysqldump --opt --add-drop-table -u$_U -p$_P -h$_H $_N | g
pg -er AskApache >`date +%m%d%y-%H%M.$_N.sqls`

# Safely store your gpg key passphrase.
pwsafe -qa "gpg keys"."$(finger `whoami` | grep Name | awk '{ print $4" "$5 }')"

# Receive, sign and send GPG key id
caff <keyid>


#:46#
# commandlinefu.com by David Winterbottom

# external projector for presentations
xrandr --auto

# Typing the current date ( or any string ) via a shortcut as if the keys had be
en actually typed with the hardware keyboard in any application.
xvkbd -xsendevent -text $(date +%Y%m%d)

# from the console, start a second X server
xinit -- :1

# Record a screencast and convert it to an mpeg
ffmpeg -f x11grab -r 25 -s 800x600 -i :0.0 /tmp/outputFile.mpg

# Propagate X session cookies on a different user and login as that user
read -p 'Username: ' u;sudo -H -u $u xauth add $(xauth list|grep :$(echo ${DISPL
AY: -4:2}));sudo su - $u

# Creates a minimalist xorg.conf
dpkg-reconfigure -phigh xserver-xorg

# Generate a graph of package dependencies
apt-cache dotty apache2 | dot -T png | display

# Copy stdin to your X11 buffer
ssh user@host cat /path/to/some/file | xclip


#:47#
# commandlinefu.com by David Winterbottom

# Output files without comments or empty lines
function catv { egrep -v "^$|^#" ${*} ; }

# Output files without comments or empty lines
grep -v "^\($\|#\)" <filenames>


#:48#
# commandlinefu.com by David Winterbottom

# Unlock your KDE4.3 session remotely
qdbus org.kde.screenlocker /MainApplication quit

# Cleanly manage tempfiles in scripts
TMPROOT=/tmp; TMPDIR=$(mktemp -d $TMPROOT/somedir.XXXXXX); TMPFILE=$(mktemp $TMP
ROOT/somefile.XXXXXX); trap "rm -rf $TMPDIR $TMPFILE; exit" INT TERM EXIT; some
treatment using $TMPDIR and $TMPFILE; exit 0

# Cleanly quit KDE4 apps
kquitapp plasma

# Show a passive popup in KDE
kdialog --passivepopup <text> <timeout>


#:49#
# commandlinefu.com by David Winterbottom

# Search for available software on a debian package system (Ubuntu)
aptitude search NAME

# Generate a graph of package dependencies
apt-cache dotty apache2 | dot -T png | display


#:50#
# commandlinefu.com by David Winterbottom

# Cleanly manage tempfiles in scripts
TMPROOT=/tmp; TMPDIR=$(mktemp -d $TMPROOT/somedir.XXXXXX); TMPFILE=$(mktemp $TMP
ROOT/somefile.XXXXXX); trap "rm -rf $TMPDIR $TMPFILE; exit" INT TERM EXIT; some
treatment using $TMPDIR and $TMPFILE; exit 0


#:51#
# commandlinefu.com by David Winterbottom

# Schedule Nice Background Commands That Won't Die on Logout - Alternative to no
hup and at
( trap '' 1; ( nice -n 19 sleep 2h && command rm -v -rf /garbage/ &>/dev/null &&
 trap 1 ) & )

# Changing the terminal title to the last shell command
trap 'echo -e "\e]0;$BASH_COMMAND\007"' DEBUG

# Cleanly manage tempfiles in scripts
TMPROOT=/tmp; TMPDIR=$(mktemp -d $TMPROOT/somedir.XXXXXX); TMPFILE=$(mktemp $TMP
ROOT/somefile.XXXXXX); trap "rm -rf $TMPDIR $TMPFILE; exit" INT TERM EXIT; some
treatment using $TMPDIR and $TMPFILE; exit 0


#:52#
# commandlinefu.com by David Winterbottom

# external projector for presentations
xrandr --auto

# autossh + ssh + screen = super rad perma-sessions
AUTOSSH_POLL=1 autossh -M 21010 hostname -t 'screen -Dr'

# Display screen window number in prompt
[[ "$WINDOW" ]] && PS1="\u@\h:\w[$WINDOW]\$ "

# Attach screen over ssh
ssh -t remote_host screen -r

# Start a file browser in the current directory
screen -d -m nautilus --no-desktop `pwd`

# Set your profile so that you resume or start a screen session on login
echo "screen -DR" >> ~/.bash_profile

# Start screen in detached mode
screen -d -m [<command>]

# Connect to all running screen instances
for i in `screen -ls | perl -ne'if(/^\s+\d+\.([^\s]+)/){print $1, " "}'`; do gno
me-terminal -e "screen -x $i"; done

# Share a terminal screen with others
% screen -r someuser/

# Creates a minimalist xorg.conf
dpkg-reconfigure -phigh xserver-xorg

# Get all the keyboard shortcuts in screen
^A ?


#:53#
# commandlinefu.com by David Winterbottom

# Function that outputs dots every second until command completes
sleeper(){ while `ps -p $1 &>/dev/null`; do echo -n "${2:-.}"; sleep ${3:-1}; do
ne; }; export -f sleeper

# Multiple Timed Execution of subshells sleeping in the background using job con
trol and sleep.
S=$SSH_TTY && (sleep 3 && echo -n 'Peace... '>$S & ) && (sleep 5 && echo -n 'Lov
e... '>$S & ) && (sleep 7 && echo 'and Intergalactic Happiness!'>$S & )

# Silently Execute a Shell Script that runs in the background and won't die on H
UP/logout
nohup /bin/sh myscript.sh 1>&2 &>/dev/null 1>&2 &>/dev/null&

# The Chronic: run a command every N seconds in the background
chronic () { t=$1; shift; while true; do $@; sleep $t; done & }

# Job Control
^Z $bg $disown

# Send current job to the background
^Z then bg


#:54#
# commandlinefu.com by David Winterbottom

# Configure a serial line device so you can evaluate it with a shell script
stty -F "/dev/ttyUSB0" 9600 ignbrk -brkint -icrnl -imaxbel -opost -onlcr -isig -
icanon -iexten -echo -echoe -echok -echoctl -echoke time 5 min 1 line 0

# Check the status of a network interface
mii-tool [if]

# Toggle cdrom device
eject -T [cdrom_device]


#:55#
# commandlinefu.com by David Winterbottom

# Display which distro is installed
test `uname` = Linux && lsb_release -a || ( test `uname` = SunOS && cat /etc/rel
ease || uname -rms )

# Find distro name and/or version/release
cat /etc/*-release


#:56#
# commandlinefu.com by David Winterbottom

# Find distro name and/or version/release
cat /etc/*-release


#:57#
# commandlinefu.com by David Winterbottom

# Show Mac OS X version information
sw_vers

# Display which distro is installed
test `uname` = Linux && lsb_release -a || ( test `uname` = SunOS && cat /etc/rel
ease || uname -rms )

# Check version of DNS Server
nslookup -q=txt -class=CHAOS version.bind NS.PHX5.NEARLYFREESPEECH.NET

# Find which version of Linux You are Running
lsb_release -d

# Find distro name and/or version/release
cat /etc/*-release


#:58#
# commandlinefu.com by David Winterbottom

# Find distro name and/or version/release
cat /etc/*-release


#:59#
# commandlinefu.com by David Winterbottom

# Print the last modified file
ls -t1 | head -n1


#:60#
# commandlinefu.com by David Winterbottom

# Parse an RPM name into its components - fast
parse_rpm() { RPM=$1;B=${RPM##*/};B=${B%.rpm};A=${B##*.};B=${B%.*};R=${B##*-};B=
${B%-*};V=${B##*-};B=${B%-*};N=$B;echo "$N $V $R $A"; }

# Create a file list of all package files installed on your Red-Hat-like system
for easy grepping
for i in `rpm -qva | sort ` ; do ; echo "===== $i =====" ; rpm -qvl $i ; done >
/tmp/pkgdetails

# List all rpms on system by name, version and release numbers, and architecture
rpm -qa --qf '%{name}-%{version}-%{release}.%{arch}\n'

# Strip out time difference entries when verifying rpms on x86_64 RHEL systems
rpm -Va | grep -v "\.\.\.\.\.\.\.T"

# Search through all installed packages names (on RPM systems)
rpm -qa \*code\*

# Find out what package some command belongs to (on RPM systems)
rpm -qif `which more`

# search installed files of package, that doesn't remember his name well. On rpm
 systems
rpm -qa | grep PACKAGENAME | xargs rpm -q --filesbypkg


#:61#
# commandlinefu.com by David Winterbottom

# search installed files of package, that doesn't remember his name well. On rpm
 systems
rpm -qa | grep PACKAGENAME | xargs rpm -q --filesbypkg


#:62#
# commandlinefu.com by David Winterbottom

# Find jpeg images and copy them to a central location
find . -iname "*.jpg" -print0 | tr '[A-Z]' '[a-z]' | xargs -0 cp --backup=number
ed -dp -u --target-directory {location} &

# Create date based backups
backup() { for i in "$@"; do cp -va $i $i.$(date +%Y%m%d-%H%M%S); done }

# Create a simple backup
tar pzcvf /result_path/result.tar.gz /target_path/target_folder

# backup local MySQL database into a folder and removes older then 5 days backup
s
mysqldump -uUSERNAME -pPASSWORD database | gzip > /path/to/db/files/db-backup-`d
ate +%Y-%m-%d`.sql.gz ;find /path/to/db/files/* -mtime +5 -exec rm {} \;

# When need to compress the Zope Database
python fsrecovery.py -P 0 -f <path-to-instance>/Data.fs <path-to-instance-destin
ation>/Data.fs.packed

# create tar archive of files in a directory and its sub-directories
tar czf /path/archive_of_foo.`date -I`.tgz /path/foo

# Creat a tar file for backup info
tar --create --file /path/$HOSTNAME-my_name_file-$(date -I).tar.gz --atime-prese
rve -p -P --same-owner -z /path/

# How to copy CD/DVD into hard disk (.iso)
dd if=/dev/cdrom of=whatever.iso

# Clone IDE Hard Disk
sudo dd if=/dev/hda1 of=/dev/hdb2

# Create Encrypted WordPress MySQL Backup without any DB details, just the wp-co
nfig.php
eval $(sed -e "s/^d[^D]*DB_\([NUPH]\).*',[^']*'\([^']*\)'.*/_\1='\2';/" -e "/^_/
!d" wp-config.php) && mysqldump --opt --add-drop-table -u$_U -p$_P -h$_H $_N | g
pg -er AskApache >`date +%m%d%y-%H%M.$_N.sqls`

# back up your commandlinefu contributed commands
curl http://www.commandlinefu.com/commands/by/<your username>/rss|gzip ->command
linefu-contribs-backup-$(date +%Y-%m-%d-%H.%M.%S).rss.gz

# Mount a partition from within a complete disk dump
lomount -diskimage /path/to/your/backup.img -partition 1 /mnt/foo

# Back up a PLESK Installation
/opt/psa/bin/pleskbackup server -v --output-file=plesk_server.bak

# Backup files incremental with rsync to a NTFS-Partition
rsync -rtvu --modify-window=1 --progress /media/SOURCE/ /media/TARGET/

# Dump the root directory to an external hard drive
dump -0 -M -B 4000000 -f /media/My\ Passport/Fedora10bckup/root_dump_fedora -z2
/

# tar per directory
cd <YOUR_DIRECTORY>; for i in `ls ./`; do tar czvf "$i".tar.gz "$i" ; done

# backup and remove files with access time older than 5 days.
tar -zcvpf backup_`date +"%Y%m%d_%H%M%S"`.tar.gz `find <target> -atime +5` 2> /d
ev/null | xargs rm -fr ;

# Download all Delicious bookmarks
curl -u username -o bookmarks.xml https://api.del.icio.us/v1/posts/all

# backup and synchronize entire remote folder locally (curlftpfs and rsync over
FTP using FUSE FS)
curlftpfs ftp://YourUsername:YourPassword@YourFTPServerURL /tmp/remote-website/
&& rsync -av /tmp/remote-website/* /usr/local/data_latest && umount /tmp/remote-
website

# backup your entire hosted website using cPanel backup interface and wget
wget --http-user=YourUsername --http-password=YourPassword http://YourWebsiteUrl
:2082/getbackup/backup-YourWebsiteUrl-`date +"%-m-%d-%Y"`.tar.gz

# Mount a partition from within a complete disk dump
INFILE=/path/to/your/backup.img; MOUNTPT=/mnt/foo; PARTITION=1; mount "$INFILE"
"$MOUNTPT" -o loop,offset=$[ `/sbin/sfdisk -d "$INFILE" | grep "start=" | head -
n $PARTITION | tail -n1 | sed 's/.*start=[ ]*//' | sed 's/,.*//'` * 512 ]

# Backup your hard drive with dd
sudo dd if=/dev/sda of=/media/disk/backup/sda.backup


#:63#
# commandlinefu.com by David Winterbottom

# VMware Server print out the state of all registered Virtual Machines.
for vm in $(vmware-cmd -l);do echo -n "${vm} ";vmware-cmd ${vm} getstate|awk '{p
rint $2 " " $3}';done


#:64#
# commandlinefu.com by David Winterbottom

# Remove security limitations from PDF documents using ghostscript
gs -q -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=OUTPUT.pdf -c .setpdfwrit
e -f INPUT.pdf

# Convert encoding of given files from one encoding to another
iconv -f utf8 -t utf16 /path/to/file

# Easily decode unix-time (funtion)
utime(){ perl -e "print localtime($1).\"\n\"";}

# most dangerous command ever.
# hdparm -mRuUwx --dco-restore --drq-hsm-error --fwdownload --security-unlock PW
D --security-set-pass PWD --security-disable PWD --security-erase PWD --security
-erase-enhanced PWD --user-master USER --security-mode MODE [device]

# Attach all discovered iscsi nodes
iscsiadm -m node -l

# Open-iscsi target discovery
iscsiadm -m discovery -t sendtargets -p 192.168.20.51

# Run a file system check on your next boot.
sudo touch /forcefsck

# Password Generation
pwgen --alt-phonics --capitalize 9 10

# Partition a new disk as all one partition tagged as "LInux LVM"
echo -e "n\np\n1\n\n\nt\n8e\nw" | fdisk /dev/sdX

# List open TCP/UDP ports
netstat -ltun

# Create a single-use TCP proxy with debug output to stderr
socat -v tcp4-l:<port> tcp4:<host>:<port>

# Create a single-use TCP proxy with copy to stdout
gate() { mkfifo /tmp/sock1 /tmp/sock2 &> /dev/null && nc -p $1 -l < /tmp/sock1 |
 tee /tmp/sock2 & PID=$! && nc $2 $3 < /tmp/sock2 | tee /tmp/sock1; kill -KILL $
PID; rm -f /tmp/sock1 /tmp/sock2 ; }

# find only current directory (universal)
find . \( ! -name . -prune \) \( -type f -o -type l \)

# Check your unread Gmail from the command line
curl -u username --silent "https://mail.google.com/mail/feed/atom" | perl -ne 'p
rint "\t" if /<name>/; print "$2\n" if /<(title|name)>(.*)<\/\1>/;'

# Detect encoding of a text file
file -i <textfile>

# Check your unread Gmail from the command line
curl -u username:password --silent "https://mail.google.com/mail/feed/atom" | tr
 -d '\n' | awk -F '<entry>' '{for (i=2; i<=NF; i++) {print $i}}' | sed -n "s/<ti
tle>\(.*\)<\/title.*name>\(.*\)<\/name>.*/\2 - \1/p"

# Force logout after 24 hours idle
fuser -k `who -u | awk '$6 == "old" { print "/dev/"$2'}`

# Change Windows Domain password from Linux
smbpasswd -r <domain-server> -U <user name>

# Remove newlines from output
grep . filename

# A fun thing to do with ram is actually open it up and take a peek. This comman
d will show you all the string (plain text) values in ram
sudo strings /dev/mem

# Remove newlines from output
cat filename | grep .

# A fun thing to do with ram is actually open it up and take a peek. This comman
d will show you all the string (plain text) values in ram
strings /dev/mem|less

# Get internal and external IP addresses
ips(){ for if in ${1:-$(ip link list|grep '^.: '|cut -d\  -f2|cut -d: -f1)};do c
ur=$(ifconfig $if|grep "inet addr"|sed 's/.*inet addr:\([0-9\.]*\).*/\1/g');prin
tf '%-5s%-15s%-15s\n' $if $cur $(nc -s $cur sine.cluenet.org 128 2>/dev/null||ec
ho $cur);done;}

# Create more threads with less stack space
ulimit -s 64

# Quick key/value display within /proc or /sys
grep -r . /sys/class/net/eth0/statistics


#:65#
# commandlinefu.com by David Winterbottom

# Make a high definition VNC
vncserver -nohttpd -name hidef-server -depth 24 -geometry 1440x900


#:66#
# commandlinefu.com by David Winterbottom

# Get info about remote host ports and OS detection
nmap -sS -P0 -sV -O <target>


#:67#
# commandlinefu.com by David Winterbottom

# List all authors of a particular git project
git log --format='%aN' | sort -u

# List all authors of a particular git project
git shortlog -s | cut -c8-

# Show git branches by date - useful for showing active branches
for k in `git branch|sed s/^..//`;do echo -e `git log -1 --pretty=format:"%Cgree
n%ci %Cblue%cr%Creset" "$k"`\\t"$k";done|sort

# Move all files untracked by git into a directory
git clean -n | sed 's/Would remove //; /Would not remove/d;' | xargs mv -t stuff
/

# Prints per-line contribution per author for a GIT repository
git ls-files | while read i; do git blame $i | sed -e 's/^[^(]*(//' -e 's/^\([^[
:digit:]]*\)[[:space:]]\+[[:digit:]].*/\1/'; done | sort | uniq -ic | sort -nr

# Prints per-line contribution per author for a GIT repository
git ls-files | xargs -n1 -d'\n' -i git-blame {} | perl -n -e '/\s\((.*?)\s[0-9]{
4}/ && print "$1\n"' | sort -f | uniq -c -w3 | sort -r

# Makes a project directory, unless it exists; changes into the dir, and creates
 an empty git repository, all in one command
gitstart () { if ! [[ -d "$@" ]]; then mkdir -p "$@" && cd "$@" && git init; els
e cd "$@" && git init; fi }

# (Git) Revert files with changed mode, not content
git diff --numstat | awk '{if ($1 == "0" && $1 == "0") print $3}'  | xargs git c
heckout HEAD

# git remove files which have been deleted
git add -u

# Show changed files, ignoring permission, date and whitespace changes
git diff --numstat -w --no-abbrev | perl -a -ne '$F[0] != 0 && $F[1] !=0 && prin
t $F[2] . "\n";'

# Show (only) list of files changed by commit
git show --relative --pretty=format:'' --name-only HASH

# Stage only portions of the changes to a file.
git add --patch <filename>

# Show log message including which files changed for a given commit in git.
git --no-pager whatchanged -1 --pretty=medium <commit_hash>

# search string in _all_ revisions
for i in `git log --all --oneline --format=%h`; do git grep SOME_STRING $i; done

# git remove files which have been deleted
git ls-files -z --deleted | xargs -0 git rm

# Show git branches by date - useful for showing active branches
for k in `git branch|perl -pe s/^..//`;do echo -e `git show --pretty=format:"%Cg
reen%ci %Cblue%cr%Creset" $k|head -n 1`\\t$k;done|sort -r

# Watch a the local directory for changes and auto-commit every minute
while TRUE; do git add *; git commit -a -m 'auto commit'; sleep 60; done

# Add forgotten changes to the last git commit
git commit --amend

# git remove files which have been deleted
git rm $(git ls-files --deleted)

# git diff of files that have been staged ie 'git add'ed
git diff --cached


#:68#
# commandlinefu.com by David Winterbottom

# Use colordiff in side-by-side mode, and with automatic column widths.
colordiff -yW"`tput cols`" /path/to/file1 /path/to/file2

# Identify differences between directories (possibly on different servers)
diff <(ssh server01 'cd config; find . -type f -exec md5sum {} \;| sort -k 2') <
(ssh server02 'cd config;find . -type f -exec md5sum {} \;| sort -k 2')

# get colorful side-by-side diffs of files in svn with vim
vimdiff <(svn cat "$1") "$1"

# use vim to get colorful diff output
svn diff | view -

# Using gdiff only select lines that are common between two files
gdiff --unified=10000 input.file1 inpute.file2 | egrep -v "(^\+[a-z]|^\-[a-z])"|
 sort > outputfile.sorted

# Use FileMerge to compare two files
opendiff <file1> <file2>

# Colored SVN diff
svn diff <file> | vim -R -

# Word-based diff on reformatted text files
diff -uw <(fmt -1 {file1, file2})

# Compare two directory trees.
diff <(cd dir1 && find | sort) <(cd dir2 && find | sort)

# Diff files on two remote hosts.
diff <(ssh alice cat /etc/apt/sources.list) <(ssh bob cat /etc/apt/sources.list)

# Scan your LAN for unauthorized IPs
diff <(nmap -sP 192.168.1.0/24 | grep ^Host | sed 's/.appears to be up.//g' | se
d 's/Host //g') auth.hosts | sed 's/[0-9][a-z,A-Z][0-9]$//' | sed 's/</UNAUTHORI
ZED IP -/g'

# Diff with colour highlighting
svn diff ARGUMENTS_FOR_DIFF | source-highlight --out-format=esc --src-lang=diff

# git diff of files that have been staged ie 'git add'ed
git diff --cached


#:69#
# commandlinefu.com by David Winterbottom

# Creates a minimalist xorg.conf
dpkg-reconfigure -phigh xserver-xorg


#:70#
# commandlinefu.com by David Winterbottom

# A command's package details
dpkg -S `which nm` | cut -d':' -f1 | (read PACKAGE; echo "[${PACKAGE}]"; dpkg -s
 "${PACKAGE}"; dpkg -L "${PACKAGE}") | less

# Edit a script that's somewhere in your path.
vim `which <scriptname>`

# Find out what package some command belongs to (on RPM systems)
rpm -qif `which more`


#:71#
# commandlinefu.com by David Winterbottom

# disable caps lock
xmodmap -e "remove Lock = Caps_Lock"


#:72#
# commandlinefu.com by David Winterbottom

# disable caps lock
xmodmap -e "remove Lock = Caps_Lock"


#:73#
# commandlinefu.com by David Winterbottom

# Track X Window events in chosen window
xev -id `xwininfo | grep 'Window id' | awk '{print $4}'`

# Find
xwininfo

# disable caps lock
xmodmap -e "remove Lock = Caps_Lock"


#:74#
# commandlinefu.com by David Winterbottom

# Show changed files, ignoring permission, date and whitespace changes
git diff --numstat -w --no-abbrev | perl -a -ne '$F[0] != 0 && $F[1] !=0 && prin
t $F[2] . "\n";'

# exclude file(s) from rsync
rsync -vazuK --exclude "*.mp3" --exclude "*.svn*" * user@host:/path


#:75#
# commandlinefu.com by David Winterbottom

# Duplicate several drives concurrently
dd if=/dev/sda | tee >(dd of=/dev/sdb) | dd of=/dev/sdc

# Generate a binary file with all ones (0xff) in it
tr '\000' '\377' < /dev/zero | dd of=allones bs=1024 count=2k

# Fill up disk space (for testing)
tail $0 >> $0

# Fill up disk space (for testing)
dd if=/dev/zero of=/fs/to/fill/dummy00 bs=8192 count=$(df --block-size=8192 / |
awk 'NR!=1 {print $4-100}')

# Testing reading speed with dd
sync; time `dd if=/dev/cciss/c0d1p1 of=/dev/null bs=1M count=10240`

# Testing writing speed with dd
sync; time `dd if=/dev/zero of=bigfile bs=1M count=2048 && sync`

# Free unused memory currently unavailable
dd if=/dev/zero of=junk bs=1M count=1K

# How to copy CD/DVD into hard disk (.iso)
dd if=/dev/cdrom of=whatever.iso

# Clone IDE Hard Disk
sudo dd if=/dev/hda1 of=/dev/hdb2

# View the octal dump of a file
od -vt x1 /tmp/spaghettifile

# Generate Random Passwords
dd if=/dev/urandom count=200 bs=1 2>/dev/null | tr "\n" " " | sed 's/[^a-zA-Z0-9
]//g' | cut -c-16

# Generate Files with Random Content and Size in Bash
no_of_files=10; counter=1;  while [[ $counter -le $no_of_files ]];   do echo Cre
ating file no $counter;   dd bs=1024 count=$RANDOM skip=$RANDOM if=/dev/sda of=r
andom-file.$counter;   let "counter += 1";  done

# clone a hard drive to a remote directory via ssh tunnel, and compressing the i
mage
# dd if=/dev/sda | gzip -c | ssh user@ip 'dd of=/mnt/backups/sda.dd'

# Create a random file of a specific size
dd if=/dev/zero of=testfile.txt bs=1M count=10

# Remove the boot loader from a usb stick
dd if=/dev/zero of=/dev/sdb bs=446 count=1

# create an emergency swapfile when the existing swap space is getting tight
sudo dd if=/dev/zero of=/swapfile bs=1024 count=1024000;sudo mkswap /swapfile; s
udo swapon /swapfile

# Binary injection
echo -n $HEXBYTES | xxd -r -p | dd of=$FILE seek=$((0x$OFFSET)) bs=1 conv=notrun
c

# show dd progress
killall -USR1 dd

# Backup your hard drive with dd
sudo dd if=/dev/sda of=/media/disk/backup/sda.backup


#:76#
# commandlinefu.com by David Winterbottom

# Convert a MOV captured from a digital camera to a smaller AVI
ffmpeg -i input.mov -b 4096k -vcodec msmpeg4v2 -acodec pcm_u8 output.avi

# Record MP3 audio via ALSA using ffmpeg
ffmpeg -f alsa -ac 2 -i hw:1,0 -acodec libmp3lame -ab 96k output.mp3

# Record audio and video from webcam using ffmpeg
ffmpeg -f alsa -r 16000 -i hw:2,0 -f video4linux2 -s 800x600 -i /dev/video0 -r 3
0 -f avi -vcodec mpeg4 -vtag xvid -sameq -acodec libmp3lame -ab 96k output.avi

# Extract audio from Mythtv recording to Rockbox iPod using ffmpeg
ffmpeg -ss 0:58:15 -i DavidLettermanBlackCrowes.mpg -acodec copy DavidLettermanB
lackCrowes.ac3

# Quick and dirty convert to flash
ffmpeg -i inputfile.mp4 outputfile.flv

# Convert ogg to mp3
for x in *.ogg; do ffmpeg -i "$x" "`basename "$x" .ogg`.mp3"; done

# Convert a VMWare screencast into a flv file
mencoder -of avi -ovc lavc movie.avi -o movie2.avi; ffmpeg -i movie2.avi -r 12
-b 100 movie.flv

# avi to ogv (Ogg Theora)
ffmpeg2theora input.avi

# Record a webcam output into a video file.
ffmpeg -an -f video4linux -s 320x240 -b 800k -r 15 -i /dev/v4l/video0 -vcodec mp
eg4 myvideo.avi

# Record a screencast and convert it to an mpeg
ffmpeg -f x11grab -r 25 -s 800x600 -i :0.0 /tmp/outputFile.mpg

# extracting audio and video from a movie
ffmpeg -i source_movie.flv -vcodec mpeg2video target_video.m2v -acodec copy targ
et_audio.mp3

# removing syncronization problems between audio and video
ffmpeg -i source_audio.mp3 -itsoffset 00:00:10.2 -i source_video.m2v target_vide
o.flv

# Create a video that is supported by youtube
ffmpeg -i mymovie.mpg -ar 22050 -acodec libmp3lame -ab 32K -r 25 -s 320x240 -vco
dec flv mytarget.flv

# Copy the sound content of a video to an mp3 file
ffmpeg -i source.flv -vn acodec copy destination.mp3

# Get video information with ffmpeg
ffmpeg -i filename.flv

# convert all files in a dir of a certain type to flv
for f in *.m4a; do ffmpeg -i "$f" "${f%.m4a}.flv"; done

# for all flv files in a dir, grab the first frame and make a jpg.
for f in *.flv; do ffmpeg -y -i "$f" -f image2 -ss 10 -vframes 1 -an "${f%.flv}.
jpg"; done

# Convert .flv to .3gp
ffmpeg -i file.flv -r 15 -b 128k -s qcif -acodec amr_nb -ar 8000 -ac 1 -ab 13 -f
 3gp -y out.3gp

# Convert a bunch of oggs into mp3s
for x in *.ogg; do ffmpeg -i "$x" "`basename "$x" .ogg`.mp3"

# Cut out a piece of film from a file. Choose an arbitrary length and starting t
ime.
ffmpeg -vcodec copy -acodec copy -i orginalfile -ss 00:01:30 -t 0:0:20 newfile

# Convert .wma files to .ogg with ffmpeg
find -name '*wma' -exec ffmpeg -i {} -acodec vorbis -ab 128k {}.ogg \;


#:77#
# commandlinefu.com by David Winterbottom

# Convert .wma files to .ogg with ffmpeg
find -name '*wma' -exec ffmpeg -i {} -acodec vorbis -ab 128k {}.ogg \;


#:78#
# commandlinefu.com by David Winterbottom

# convert wav files to ogg
oggenc *.wav

# Convert ogg to mp3
for x in *.ogg; do ffmpeg -i "$x" "`basename "$x" .ogg`.mp3"; done

# Convert a bunch of oggs into mp3s
for x in *.ogg; do ffmpeg -i "$x" "`basename "$x" .ogg`.mp3"

# Convert .wma files to .ogg with ffmpeg
find -name '*wma' -exec ffmpeg -i {} -acodec vorbis -ab 128k {}.ogg \;


#:79#
# commandlinefu.com by David Winterbottom

# Increase mplayer maximum volume
mplayer dvd:// -softvol -softvol-max 500

# Listen to BBC Radio from the command line.
bbcradio() { local s;echo "Select a station:";select s in 1 1x 2 3 4 5 6 7 "Asia
n Network an" "Nations & Local lcl";do break;done;s=($s);mplayer -playlist "http
://www.bbc.co.uk/radio/listen/live/r"${s[@]: -1}".asx";}

# Get the total length of all video / audio in the current dir (and below) in H:
m:s
find -type f -name "*.avi" -print0 | xargs -0  mplayer -vo dummy -ao dummy -iden
tify 2>/dev/null | perl -nle '/ID_LENGTH=([0-9\.]+)/ && ($t +=$1) && printf "%02
d:%02d:%02d\n",$t/3600,$t/60%60,$t%60' | tail -n 1

# View a sopcast stream
(sp-sc sop://broker.sopcast.com:3912/6002 3900 8900 &>/dev/null &); sleep 10; mp
layer http://localhost:8900/tv.asf

# Instant mirror from your laptop + webcam (fullscreen+grab)
mplayer -fs -vf screenshot,mirror tv://

# Instant mirror from your laptop + webcam
mplayer tv:// -vf mirror

# View webcam output using mplayer
mplayer tv:// -tv driver=v4l2:width=640:height=480:device=/dev/video0:fps=30:out
fmt=yuy2

# Stream YouTube URL directly to mplayer
mplayer -fs $(echo "http://youtube.com/get_video.php?$(curl -s $youtube_url | se
d -n 's/.*", "video_id": "\([^"]*\)", ".*", "t": "\([^"]*\)", .*/video_id=\1\&t=
\2/p')")

# Lire une video dans une console Linux
mplayer -vo caca foo.avi

# Extract track 9 from a CD
mplayer -fs cdda://9 -ao pcm:file=track9.wav

# remove audio trac from a video file
mencoder -ovc copy -nosound ./movie.mov -o ./movie_mute.mov

# covert m4a audio files to wav
find . -name '*.m4a' | xargs -I audiofile mplayer -ao pcm "audiofile" -ao pcm:fi
le="audiofile.wav"

# Rip a DVD to AVI format
mencoder dvd://1 -aid 128 -o track-1.avi -oac copy -ovc lavc -lavcopts vcodec=mp
eg4

# Bash Alias That Plays Music from SomaFM
alias somafm='read -p "Which station? "; mplayer --reallyquiet -vo none -ao sdl
http://somafm.com/startstream=${REPLY}.pls'

# Plays Music from SomaFM
read -p "Which station? "; mplayer --reallyquiet -vo none -ao sdl http://somafm.
com/startstream=${REPLY}.pls

# play high-res video files on a slow processor
mplayer -framedrop -vfm ffmpeg -lavdopts lowres=1:fast:skiploopfilter=all

# Using ASCII Art output on MPlayer
mplayer -vo aa <video file>

# Convert a mp3 file to m4a
mplayer -vo null -vc null -ao pcm:fast:file=file.wav file.mp3; faac -b 128 -c 44
100 -w file.wav

# Quick alias for playing music.
alias mux='clear && cd ~/Music/ && ls && echo -n "File> " && read msi && mplayer
 ~/Music/$msi'

# Stream YouTube URL directly to mplayer.
mplayer -fs $(echo "http://youtube.com/get_video.php?$(curl -s $youtube_url | se
d -n "/watch_fullscreen/s;.*\(video_id.\+\)&title.*;\1;p")")

# Use mplayer to save video streams to a file
mplayer -dumpstream -dumpfile "yourfile" -playlist "URL"


#:80#
# commandlinefu.com by David Winterbottom

# Listen to BBC Radio from the command line.
bbcradio() { local s;echo "Select a station:";select s in 1 1x 2 3 4 5 6 7 "Asia
n Network an" "Nations & Local lcl";do break;done;s=($s);mplayer -playlist "http
://www.bbc.co.uk/radio/listen/live/r"${s[@]: -1}".asx";}

# Use mplayer to save video streams to a file
mplayer -dumpstream -dumpfile "yourfile" -playlist "URL"


#:81#
# commandlinefu.com by David Winterbottom

# Rip DVD to YouTube ready MPEG-4 AVI file using mencoder
mencoder -oac mp3lame -lameopts cbr=128 -ovc lavc -lavcopts vcodec=mpeg4 -ffourc
c xvid -vf scale=320:-2,expand=:240:::1 -o output.avi dvd://0

# Rip a DVD to AVI format
mencoder dvd://1 -aid 128 -o track-1.avi -oac copy -ovc lavc -lavcopts vcodec=mp
eg4

# Use mplayer to save video streams to a file
mplayer -dumpstream -dumpfile "yourfile" -playlist "URL"


#:82#
# commandlinefu.com by David Winterbottom

# Start a command on only one CPU core
taskset -c 0 your_command


#:83#
# commandlinefu.com by David Winterbottom

# 32 bits or 64 bits?
sudo lshw -C cpu|grep width

# Start a command on only one CPU core
taskset -c 0 your_command


#:84#
# commandlinefu.com by David Winterbottom

# Start a command on only one CPU core
taskset -c 0 your_command


#:85#
# commandlinefu.com by David Winterbottom

# Use curl on Windows to bulk-download the Savitabhabhi Comic Strip (for Adults)
for /L %%x in (1,1,16) do mkdir %%x & curl -R -e http://www.kirtu.com -o %%x/#1.
jpg http://www.kirtu.com/toon/content/sb%x/english/sb%x_en_[001-070].jpg

# Get all members from one AD group and put them in another AD group
for /F "DELIMS=""" %i in ('dsquery group -name SourceGroupName ^| dsget group -m
embers') do dsquery group -name TargetGroupName | dsmod group -addmbr %i

# Use Cygwin to talk to the Windows clipboard
cat /dev/clipboard; $(somecommand) > /dev/clipboard

# Shutdown a Windows machine from Linux
net rpc shutdown -I ipAddressOfWindowsPC -U username%password

# Extract icons from windows exe/dll
wrestool -x --output . -t14 /path/to/your-file.exe

# Click on a GUI window and show its process ID and command used to run the proc
ess
xprop | awk '/PID/ {print $3}' | xargs ps h -o pid,cmd


#:86#
# commandlinefu.com by David Winterbottom

# Extract icons from windows exe/dll
wrestool -x --output . -t14 /path/to/your-file.exe


#:87#
# commandlinefu.com by David Winterbottom

# Extract icons from windows exe/dll
wrestool -x --output . -t14 /path/to/your-file.exe


#:88#
# commandlinefu.com by David Winterbottom

# mount an iso
mount -o loop -t iso9660 my.iso /mnt/something

# Mount a Windows share on the local network (Ubuntu) with user rights and use a
 specific samba user
sudo mount -t cifs -o credentials=/path/to/credenials //hostname/sharename /moun
t/point

# Make directories for and mount all iso files in a folder
for file in *.iso; do mkdir `basename $file | awk -F. '{print $1}'`; sudo mount
-t iso9660 -o loop $file `basename $file | awk -F. '{print $1}'`;  done

# currently mounted filesystems in nice layout
column -t /proc/mounts

# Mount a partition from within a complete disk dump
lomount -diskimage /path/to/your/backup.img -partition 1 /mnt/foo

# Show all detected mountable Drives/Partitions/BlockDevices
hwinfo --block --short

# Mount important virtual system directories under chroot'ed directory
for i in sys dev proc; do sudo mount --bind /$i /mnt/xxx/$i; done

# automount samba shares as devices in /mnt/
sudo vi /etc/fstab; Go//smb-share/gino /mnt/place smbfs defaults,username=gino,p
assword=pass 0 0<esc>:wq; mount //smb-share/gino

# backup and synchronize entire remote folder locally (curlftpfs and rsync over
FTP using FUSE FS)
curlftpfs ftp://YourUsername:YourPassword@YourFTPServerURL /tmp/remote-website/
&& rsync -av /tmp/remote-website/* /usr/local/data_latest && umount /tmp/remote-
website

# currently mounted filesystems in nice layout
mount | column -t

# Mount a partition from within a complete disk dump
INFILE=/path/to/your/backup.img; MOUNTPT=/mnt/foo; PARTITION=1; mount "$INFILE"
"$MOUNTPT" -o loop,offset=$[ `/sbin/sfdisk -d "$INFILE" | grep "start=" | head -
n $PARTITION | tail -n1 | sed 's/.*start=[ ]*//' | sed 's/,.*//'` * 512 ]

# Remount root in read-write mode.
sudo mount -o remount,rw /

# Mount a .iso file in UNIX/Linux
mount /path/to/file.iso /mnt/cdrom -oloop


#:89#
# commandlinefu.com by David Winterbottom

# Remount root in read-write mode.
sudo mount -o remount,rw /


#:90#
# commandlinefu.com by David Winterbottom

# Remount root in read-write mode.
sudo mount -o remount,rw /


#:91#
# commandlinefu.com by David Winterbottom

# Print trending topics on Twitter
curl -s search.twitter.com | awk -F'</?[^>]+>' '/\/intra\/trend\//{print $2}'

# Update twitter via curl (and also set the "from" bit)
curl -u twitter-username -d status="Hello World, Twitter!" -d source="cURL" http
://twitter.com/statuses/update.xml

# Update twitter via curl as Function
tweet(){ curl -u "$1" -d status="$2" "http://twitter.com/statuses/update.xml"; }

# Update twitter from command line without reveal your password
curl -n -d status='Hello from cli' https://twitter.com/statuses/update.xml

# Twitter update from terminal    (pok3's snipts ?)
curl -u YourUsername:YourPassword -d status="Your status message go here" http:/
/twitter.com/statuses/update.xml

# Twit Amarok "now playing" song
curl -u <user>:<password> -d status="Amarok, now playing: $(dcop amarok default
nowPlaying)" http://twitter.com/statuses/update.json

# Twitpic upload and Tweet
curl --form username=from_twitter --form password=from_twitter --form media=@/pa
th/to/image --form-string "message=tweet" http://twitpic.com/api/uploadAndPost

# PlayTweets from the command line
vlc $(curl -s http://twitter.com/statuses/user_timeline/18855500.rss|grep play|s
ed -ne '/<title>/s/^.*\(http.*\)<\/title/\1/gp'|awk '{print $1}')


#:92#
# commandlinefu.com by David Winterbottom

# Check the last 15 package operations (on yum systems)
tail -n 15 /var/log/yum.log | tac


#:93#
# commandlinefu.com by David Winterbottom

# find read write traffic on disk since startup
iostat -m -d /dev/sda1

# Make an iso file out of your entire hard drive
dd if=/dev/hda of=file.img

# Make an iso file out of your entire hard drive
cat /dev/hda > ~/hda.iso

# Testing hard disk reading speed
hdparm -t /dev/sda

# Clone IDE Hard Disk
sudo dd if=/dev/hda1 of=/dev/hdb2

# Listing the Size and usage of the connected Hard Disks
df -H


#:94#
# commandlinefu.com by David Winterbottom

# Listing the Size and usage of the connected Hard Disks
df -H


#:95#
# commandlinefu.com by David Winterbottom

# Mount a partition from within a complete disk dump
lomount -diskimage /path/to/your/backup.img -partition 1 /mnt/foo

# Mount a partition from within a complete disk dump
INFILE=/path/to/your/backup.img; MOUNTPT=/mnt/foo; PARTITION=1; mount "$INFILE"
"$MOUNTPT" -o loop,offset=$[ `/sbin/sfdisk -d "$INFILE" | grep "start=" | head -
n $PARTITION | tail -n1 | sed 's/.*start=[ ]*//' | sed 's/,.*//'` * 512 ]

# Listing the Size and usage of the connected Hard Disks
df -H


#:96#
# commandlinefu.com by David Winterbottom

# Get the size of all the directories in current directory (Sorted Human Readabl
e)
sudo du -ks $(ls -d */) | sort -nr | cut -f2 | xargs -d '\n' du -sh 2> /dev/null

# Get the size of all the directories in current directory
du -hd 1

# Get the size of all the directories in current directory
du --max-depth=1

# Get the size of all the directories in current directory
sudo du -sh $(ls -d */) 2> /dev/null

# Which files/dirs waste my disk space
du -aB1m|awk '$1 >= 100'

# ncdu - ncurses disk usage
ncdu directory_name

# Shred an complete disk, by overwritting its content 10 times
sudo shred -zn10 /dev/sda

# Shows size of dirs and files, hidden or not, sorted.
du -cs * .[^\.]* | sort -n

# Listing the Size and usage of the connected Hard Disks
df -H


#:97#
# commandlinefu.com by David Winterbottom

# Print man pages to PDF (yes, another one)
man -t [command] | lp -d PDF -t [command].pdf

# Convert man page to PDF
man -Tps ls >> ls_manpage.ps && ps2pdf ls_manpage.ps

# List commands with a short summary
find `echo "${PATH}" | tr ':' ' '` -type f | while read COMMAND; do man -f "${CO
MMAND##*/}"; done

# Convert "man page" to text file
man ls | col -b > ~/Desktop/man_ls.txt

# View a man page on a nice interface
yelp man:foo

# Launch a command from a manpage
!date


#:98#
# commandlinefu.com by David Winterbottom

# determine if tcp port is open
nmap -p 80 hostname

# determine if tcp port is open
nc -zw2 www.example.com 80 && echo open

# determine if tcp port is open
if (nc -zw2 www.example.com 80); then echo open; fi

# Create a single-use TCP proxy with copy to stdout
gate() { mkfifo /tmp/sock1 /tmp/sock2 &> /dev/null && nc -p $1 -l < /tmp/sock1 |
 tee /tmp/sock2 & PID=$! && nc $2 $3 < /tmp/sock2 | tee /tmp/sock1; kill -KILL $
PID; rm -f /tmp/sock1 /tmp/sock2 ; }

# Port scan a range of hosts with Netcat.
for i in {21..29}; do nc -v -n -z -w 1 192.168.0.$i 443; done

# pipe commands from a textfile to a telnet-server with netcat
nc $telnetserver 23 < $commandfile

# Pipe the result of a command to IRC (channel or query)
function my_irc { tmp=`mktemp`; cat > $tmp; { echo -e "USER $username x x :$ircn
ame\nNICK $nick\nJOIN $target"; while read line; do echo -e "PRIVMSG $target :$l
ine"; done < $tmp; } | nc $server > /dev/null ; rm $tmp; }

# Copy files over network using compression
on the listening side: sudo nc -lp 2022 | sudo tar -xvf -    and on the sending
side:      tar -cvzf - ./*| nc -w 3 name_of_listening_host 2022

# Trojan inverse shell
nc -l -p 2000 -e /bin/bash

# mp3 streaming
nc -l -p 2000 < song.mp3

# Create a single-use TCP (or UDP) proxy
nc -l -p 2000 -c "nc example.org 3000"


#:99#
# commandlinefu.com by David Winterbottom

# Pipe ls output into less
function lsless() { ls "$@" | less; }

# Less a grep result, going directly to the first match in the first file
argv=("$@"); rest=${argv[@]:1}; less -JMN +"/$1" `grep -l $1 $rest`

# Alternative size (human readable) of files and directories (biggest last)
du -ms * | sort -nk1

# Alternative size (human readable) of files and directories (biggest last)
du -ms * .[^.]*| sort -nk1

# Alternative size (human readable) of directories (biggest first)
function duf { du -k $@ | sort -rn | perl -ne '($s,$f)=split(/\t/,$_,2);for(qw(K
 M G T)){if($s<1024){$x=($s<10?"%.1f":"%3d");printf("$x$_\t%s",$s,$f);last};$s/=
1024}' }

# Alternative size (human readable) of directories (biggest first)
du -h -s -x * | sort -g -b -r | less -F

# View and review the system process tree.
pstree -Gap | less -r

# Search for a word in less
\bTERM\b

# Read almost everything (Changelog.gz, .tgz, .deb, .png, .pdf, etc, etc....)
less -r <some file>


#:100#
# commandlinefu.com by David Winterbottom


#:101#
# commandlinefu.com by David Winterbottom

# Find all files <10MB and sum up their size
i=0; for f in $(find ./ -size -10M -exec stat -c %s {} \; ); do i=$(($i + $f));
done; echo $i

# find out how much space are occuipied by files smaller than 1024K (sic) - impr
oved
find dir -size -1024k -type f -print0 | du --files0-from - -bc

# find out how much space are occuipied by files smaller than 1024K
find dir -size -1024k -type f | xargs -d $'\n' -n1 ls -l | cut -d ' ' -f 5  | se
d -e '2,$s/$/+/' -e '$ap' | dc

# Which files/dirs waste my disk space
du -aB1m|awk '$1 >= 100'

# Gentoo: Get the size of all installed packets, sorted
equery s | sed 's/(\|)/ /g' | sort -n -k 9 | gawk '{print $1" "$9/1048576"m"}'

# find files larger than 1 GB, everywhere
find / -type f -size +1000000000c

# Create a random file of a specific size
dd if=/dev/zero of=testfile.txt bs=1M count=10

# How to Find the Block Size
/sbin/dumpe2fs /dev/hda2 | grep 'Block size'

# list and sort files by size in reverse order (file size in human readable outp
ut)
ls -S -lhr

# Shows size of dirs and files, hidden or not, sorted.
du -cs * .[^\.]* | sort -n


#:102#
# commandlinefu.com by David Winterbottom

# Randomize lines (opposite of | sort)
perl -wl -e '@f=<>; for $i (0 .. $#f) { $r=int rand ($i+1); @f[$i, $r]=@f[$r,$i]
 if ($i!=$r); } chomp @f; print join $/, @f;' try.txt

# List your largest installed packages (on Debian/Ubuntu)
dpigs

# List your largest installed packages (on Debian/Ubuntu)
sed -ne '/^Package: \(.*\)/{s//\1/;h;};/^Installed-Size:  \(.*\)/{s//\1/;G;s/\n/
 /;p;}' /var/lib/dpkg/status | sort -rn

# List your largest installed packages (on Debian/Ubuntu)
perl -ne '$pkg=$1 if m/^Package: (.*)/; print "$1\t$pkg\n" if m/^Installed-Size:
 (.*)/;' < /var/lib/dpkg/status | sort -rn | less

# Randomize lines (opposite of | sort)
random -f <file>

# Randomize lines (opposite of | sort)
cat ~/SortedFile.txt | perl -wnl -e '@f=<>; END{ foreach $i (reverse 0 .. $#f) {
 $r=int rand ($i+1); @f[$i, $r]=@f[$r,$i] unless ($i==$r); }  chomp @f; foreach
$line (@f){ print $line; }}'

# Ultimate current directory usage command
find . -maxdepth 1 ! -name '.'  -execdir du -0 -s {} + | sort -znr | gawk 'BEGIN
{ORS=RS="\0";} {sub($1 "\t", ""); print $0;}' | xargs -0 du -hs

# Identify differences between directories (possibly on different servers)
diff <(ssh server01 'cd config; find . -type f -exec md5sum {} \;| sort -k 2') <
(ssh server02 'cd config;find . -type f -exec md5sum {} \;| sort -k 2')

# Ultimate current directory usage command
du -a --max-depth=1 | sort -n | cut -d/ -f2 | sed '$d' | while read i; do if [ -
f $i ]; then du -h "$i"; else echo "$(du -h --max-depth=0 "$i")/"; fi; done

# Ultimate current directory usage command
find . -maxdepth 1 -type d|xargs du -a --max-depth=0|sort -rn|cut -d/ -f2|sed '1
d'|while read i;do echo "$(du -h --max-depth=0 "$i")/";done;find . -maxdepth 1 -
type f|xargs du -a|sort -rn|cut -d/ -f2|sed '$d'|while read i;do du -h "$i";done

# List all groups and the user names that were in each group
for u in `cut -f1 -d: /etc/passwd`; do echo -n $u:; groups $u; done | sort

# Check which files are opened by Firefox then sort by largest size.
FFPID=$(pidof firefox-bin) && lsof -p $FFPID | awk '{ if($7>0) print ($7/1024/10
24)" MB -- "$9; }' | grep ".mozilla" | sort -rn

# find the biggest files recursively, no matter how many
find . -type f -printf '%20s %p\n' | sort -n | cut -b22- | tr '\n' '\000' | xarg
s -0 ls -laSr

# Move all but the newest 100 emails to a gzipped archive
find $MAILDIR/ -type f -printf '%T@ %p\n' | sort --reverse | sed -e '{ 1,100d; s
/[0-9]*\.[0-9]* \(.*\)/\1/g }' | xargs -i sh -c "cat {}&&rm -f {}" | gzip -c >>A
RCHIVE.gz

# Lists unambigously names of all xml elements used in files in current director
y
grep -Eho '<[a-ZA-Z_][a-zA-Z0-9_-:]*' * | sort -u | cut -c2-

# Sort your music
for file in *.mp3;do mkdir -p "$(mp3info -p "%a/%l" "$file")" && ln -s "$file" "
$(mp3info -p "%a/%l/%t.mp3" "$file")";done

# Sorting by rows
infile=$1 for i in $(cat $infile) do     echo $i | tr "," "\n" | sort -n | tr "\
n" "," | sed "s/,$//"    echo done

# Alternative size (human readable) of files and directories (biggest last)
du -ms * | sort -nk1

# Alternative size (human readable) of directories (biggest last)
function duf { du -sk "$@" | sort -n | while read size fname; do for unit in k M
 G T P E Z Y; do if [ $size -lt 1024 ]; then echo -e "${size}${unit}\t${fname}";
 break; fi; size=$((size/1024)); done; done; }

# Alternative size (human readable) of files and directories (biggest last)
du -ms * .[^.]*| sort -nk1

# Alternative size (human readable) of directories (biggest first)
function duf { du -k $@ | sort -rn | perl -ne '($s,$f)=split(/\t/,$_,2);for(qw(K
 M G T)){if($s<1024){$x=($s<10?"%.1f":"%3d");printf("$x$_\t%s",$s,$f);last};$s/=
1024}' }

# Alternative size (human readable) of directories (biggest first)
du -h -s -x * | sort -g -b -r | less -F

# Size(k) of directories(Biggest first)
find . -depth -type d -exec du -s {} \; | sort -k1nr

# Using gdiff only select lines that are common between two files
gdiff --unified=10000 input.file1 inpute.file2 | egrep -v "(^\+[a-z]|^\-[a-z])"|
 sort > outputfile.sorted

# Lists unambigously names of all xml elements used in files in current director
y
grep -h -o '<[^/!?][^ >]*' * | sort -u | cut -c2-


#:103#
# commandlinefu.com by David Winterbottom

# Search for all files that begin with . and delete them.
find ~/Desktop/ \( -regex '.*/\..*' \) -print -exec rm -Rf {} \;

# Copy all files. All normal files, all hidden files and all files starting with
 - (minus).
cp ./* .[!.]* ..?* /path/to/dir

# alias to list hidden files of a folder
alias lh='ls -a | egrep "^\."'

# Shows size of dirs and files, hidden or not, sorted.
du -cs * .[^\.]* | sort -n


#:104#
# commandlinefu.com by David Winterbottom

# Randomize lines (opposite of | sort)
perl -wl -e '@f=<>; for $i (0 .. $#f) { $r=int rand ($i+1); @f[$i, $r]=@f[$r,$i]
 if ($i!=$r); } chomp @f; print join $/, @f;' try.txt

# Extract all urls from last firefox sessionstore used in a portable way.
perl -lne 'print for /url":"\K[^"]+/g' $(ls -t ~/.mozilla/firefox/*/sessionstore
.js | sed q)

# Display IP adress of the given interface in a most portable and reliable way.
That should works on many platforms.
x=IO::Interface::Simple; perl -e 'use '$x';' &>/dev/null || cpan -i "$x"; perl -
e 'use '$x'; my $ip='$x'->new($ARGV[0]); print $ip->address,$/;' <INTERFACE>

# perl one-liner to get the current week number
perl -e 'use Date::Calc qw(Today Week_Number); $weekn = Week_Number(Today); prin
t "$weekn\n"'

# Match a URL
cho "(Something like http://foo.com/blah_blah)" | awk '{for(i=1;i<=NF;i++){if($i
~/^(http|ftp):\/\//)print $i}}'

# Match a URL
echo "(Something like http://foo.com/blah_blah)" | grep -oP "\b(([\w-]+://?|www[
.])[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|/)))"

# urldecoding
perl -pe 's/%([0-9a-f]{2})/sprintf("%s", pack("H2",$1))/eig'

# Easily decode unix-time (funtion)
utime(){ perl -e "print localtime($1).\"\n\"";}

# List your largest installed packages (on Debian/Ubuntu)
dpigs

# List your largest installed packages (on Debian/Ubuntu)
perl -ne '$pkg=$1 if m/^Package: (.*)/; print "$1\t$pkg\n" if m/^Installed-Size:
 (.*)/;' < /var/lib/dpkg/status | sort -rn | less

# Transforms a file to all uppercase.
perl -i -ne 'print uc $_' $1

# validate the syntax of a perl-compatible regular expression
perl -we 'my $regex = eval {qr/.*/}; die "$@" if $@;'

# Transforms a file to all uppercase.
perl -pi -e 's/([[:lower:]]+)/uc $1/gsex' file

# Print all members of US House of Representatives
curl "http://www.house.gov/house/MemberWWW.shtml" 2>/dev/null | sed -e :a -e 's/
<[^>]*>//g;/</N;//ba' | perl -nle 's/^\t\t(.*$)/ $1/ and print;'

# Randomize lines (opposite of | sort)
random -f <file>

# Get the total length of all video / audio in the current dir (and below) in H:
m:s
find -type f -name "*.avi" -print0 | xargs -0  mplayer -vo dummy -ao dummy -iden
tify 2>/dev/null | perl -nle '/ID_LENGTH=([0-9\.]+)/ && ($t +=$1) && printf "%02
d:%02d:%02d\n",$t/3600,$t/60%60,$t%60' | tail -n 1

# Randomize lines (opposite of | sort)
cat ~/SortedFile.txt | perl -wnl -e '@f=<>; END{ foreach $i (reverse 0 .. $#f) {
 $r=int rand ($i+1); @f[$i, $r]=@f[$r,$i] unless ($i==$r); }  chomp @f; foreach
$line (@f){ print $line; }}'

# Dump all of perl's config info
perl -le 'use Config; foreach $i (keys %Config) {print "$i : @Config{$i}"}'

# Find and display most recent files using find and perl
find $HOME -type f -print0 | perl -0 -wn -e '@f=<>; foreach $file (@f){ (@el)=(s
tat($file)); push @el, $file; push @files,[ @el ];} @o=sort{$a->[9]<=>$b->[9]} @
files; for $i (0..$#o){print scalar localtime($o[$i][9]), "\t$o[$i][-1]\n";}'|ta
il

# regex to match an ip
perl -wlne 'print $1 if /(([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25
[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5]))/' iplist

# print scalar gmtime
perl -e "print scalar(gmtime(1247848584))"

# Check your unread Gmail from the command line
curl -u username --silent "https://mail.google.com/mail/feed/atom" | perl -ne 'p
rint "\t" if /<name>/; print "$2\n" if /<(title|name)>(.*)<\/\1>/;'

# Check your unread Gmail from the command line
curl -u username:password --silent "https://mail.google.com/mail/feed/atom" | tr
 -d '\n' | awk -F '<entry>' '{for (i=2; i<=NF; i++) {print $i}}' | sed -n "s/<ti
tle>\(.*\)<\/title.*name>\(.*\)<\/name>.*/\2 - \1/p"

# Find all PowerPC applications on OS X
system_profiler SPApplicationsDataType | perl -nl -e  '@al=<>; $c=@al; while($j<
$c){ $apps[$i].=$al[$j]; $i++ if ($al[$j] ) =~ /^\s\s\s\s\S.*:$/; $j++} while($k
<$i){ $_=$apps[$k++]; if (/Kind: PowerPC/s) {print;}}'

# Show display adapter, available drivers, and driver in use
lspci -v | perl -ne '/VGA/../^$/  and /VGA|Kern/ and print'


#:105#
# commandlinefu.com by David Winterbottom

# Search The History for a Particular Command (ssh in this case)
history | grep ssh

# Alias to edit and source your .bashrc file
alias vb='vim ~/.bashrc; source ~/.bashrc'


#:106#
# commandlinefu.com by David Winterbottom

# Easily decode unix-time (funtion)
utime(){ perl -e "print localtime($1).\"\n\"";}

# Creates Solaris alternate boot environment on another zpool.
lucreate -n be1 [-c be0] -p zpool1

# find only current directory (universal)
find . \( ! -name . -prune \) \( -type f -o -type l \)

# Force logout after 24 hours idle
fuser -k `who -u | awk '$6 == "old" { print "/dev/"$2'}`

# convert unixtime to human-readable
perl -e 'print scalar(gmtime(1234567890)), "\n"'

# convert unixtime to human-readable
echo "0t${currentEpoch}=Y" | /usr/bin/adb

# Solaris - check ports/sockets which process has opened
/usr/proc/bin/pfiles $PID | egrep "sockname|port"

# Find which package a file belongs to on Solaris
pkgchk -l -p <full path to the file>

# view solaris system logs
more /var/adm/messages

# sun solaris 9 complete restart
init 6

# Replace Solaris vmstat numbers with human readable format
vmstat 1 10 | /usr/xpg4/bin/awk -f ph-vmstat.awk

# Display kernel profile of currently executing functions in Solaris.
lockstat -I -i 977 -s 30 -h sleep 1 > /tmp/profile.out

# NICs, IPs, and Mac
ifconfig -a | nawk 'BEGIN {FS=" "}{RS="\n"}{ if($1~ /:/) {printf "%s ", $1}}{ if
($1=="inet") {print " -- ",system("arp "$2)}}'|egrep -v "^[0-9]$"


#:107#
# commandlinefu.com by David Winterbottom

# Watch number of lines being processed on a clear screen
cat /dev/urandom|awk 'BEGIN{"tput cuu1" | getline CursorUp; "tput clear" | getli
ne Clear; printf Clear}{num+=1;printf CursorUp; print num}'

# NICs, IPs, and Mac
ifconfig -a | nawk 'BEGIN {FS=" "}{RS="\n"}{ if($1~ /:/) {printf "%s ", $1}}{ if
($1=="inet") {print " -- ",system("arp "$2)}}'|egrep -v "^[0-9]$"


#:108#
# commandlinefu.com by David Winterbottom

# Return IP Address
perl -e '$_=`ifconfig eth0`;/\d+.\d+.\d+.\d+ /; print $&,"\n";'

# Return IP Address
ifconfig|while read i;do [[ $i =~ inet.*B ]]&&r=${i%%B*}&&echo ${r/*[tr]:/};done

# Return IP Address
ifconfig -a| awk 'BEGIN{FS="[ :]+"} /Bcast/{print $4}'

# Return IP Address
ifconfig -a|grep Bcast:|cut -d\: -f2|awk '{print $1}'

# Get ethX mac addresses
ifconfig | awk '/HW/ {print $5}'

# Grab an interface's IP from ifconfig without screen clutter
ifconfig eth1 | grep inet\ addr | awk '{print $2}' | cut -d: -f2 | sed s/^/eth1:
\ /g

# Get all IPs via ifconfig
ifconfig -a | perl -nle'/(\d+\.\d+\.\d+\.\d+)/ && print $1'

# Get all IPs via ifconfig
ifconfig | awk '/ddr:[0-9]/ {sub(/addr:/, ""); print $2}'

# Get all IPs via ifconfig
ipconfig getpacket en0 | grep yi| sed s."yiaddr = "."en0: ".  ipconfig getpacket
 en1 | grep yi| sed s."yiaddr = "."en1: ".

# Get all IPs via ifconfig
ifconfig | awk -F':| +'  '/ddr:/{print $4}'

# Get all IPs via ifconfig
ifconfig | grep "inet [[:alpha:]]\+" | cut -d: -f2 | cut -d' ' -f2

# Get all IPs via ifconfig
ifconfig | grep "inet addr" | cut -d: -f2 | cut -d' ' -f1

# Get all IPs via ifconfig
ifconfig | perl -nle'/dr:(\S+)/ && print $1'

# get linkspeed, ip-adress, mac-address and processor type from osx
echo "-------------" >> nicinfo.txt; echo "computer name x" >> nicinfo.txt; ifco
nfig | grep status >> nicinfo.txt; ifconfig | grep inet >> nicinfo.txt; ifconfig
 | grep ether >> nicinfo.txt; hostinfo | grep type >> nicinfo.txt;

# Mac, ip, and hostname change - sweet!
ifconfig eth0 down hw ether (newmacaddresshere) && ifconfig eth0 up && ifconfig
eth0 (newipaddresshere) netmask 255.255.255.0 up && /bin/hostname (newhostnamehe
re)

# sends your internal IP by email
ifconfig en1 | awk '/inet / {print $2}' | mail -s "hello world" email@email.com

# Get the IP address of a machine. Just the IP, no junk.
/sbin/ifconfig -a | awk '/(cast)/ { print $2 }' | cut -d':' -f2 | head -1

# Measures download speed on eth0
while true; do X=$Y; sleep 1; Y=$(ifconfig eth0|grep RX\ bytes|awk '{ print $2 }
'|cut -d : -f 2); echo "$(( Y-X )) bps"; done

# alias to show my own configured ip
alias showip="ifconfig eth0 | grep 'inet addr:' | sed 's/.*addr\:\(.*\) Bcast\:.
*/\1/'"

# NICs, IPs, and Mac
ifconfig -a | nawk 'BEGIN {FS=" "}{RS="\n"}{ if($1~ /:/) {printf "%s ", $1}}{ if
($1=="inet") {print " -- ",system("arp "$2)}}'|egrep -v "^[0-9]$"


#:109#
# commandlinefu.com by David Winterbottom

# Find all dot files and directories
ls -d .*

# Find all dot files and directories
echo .*

# Find all dot files and directories
printf "%s\n" .*

# Find all dot files and directories
ls -a | egrep "^\.\w"

# Get Futurama quotations from slashdot.org servers
lynx -head -dump http://slashdot.org|egrep 'Bender|Fry'|sed 's/X-//'

# Filter IPs out of files
egrep -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' file.txt

# Show a config file without comments
egrep -v "^$|^[[:space:]]*#" /etc/some/file

# Gets a random Futurama quote from /.
curl -Is slashdot.org | egrep '^X-(F|B|L)' | cut -d \- -f 2

# NICs, IPs, and Mac
ifconfig -a | nawk 'BEGIN {FS=" "}{RS="\n"}{ if($1~ /:/) {printf "%s ", $1}}{ if
($1=="inet") {print " -- ",system("arp "$2)}}'|egrep -v "^[0-9]$"


#:110#
# commandlinefu.com by David Winterbottom

# Do a search-and-replace in a file after making a backup
sed -i.bak 's/old/new/g' file

# Display the output of a command from the first line until the first instance o
f a regular expression.
command | sed '/regex/q'

# Display the output of a command from the first line until the first instance o
f a regular expression.
command | sed -n '1,/regex/p'

# Print line numbers
sed = <file> | sed 'N;s/\n/\t/'

# Extract all urls from the last firefox sessionstore.js file used.
grep -oP '"url":"\K[^"]+' $(ls -t ~/.mozilla/firefox/*/sessionstore.js | sed q)

# View a random xkcd comic
wget -q http://dynamic.xkcd.com/comic/random/ -O-| sed -n '/<img src="http:\/\/i
mgs.xkcd.com\/comics/{s/.*\(http:.*\)" t.*/\1/;p}' | awk '{system ("wget -q " $1
 " -O- | display -title $(basename " $1") -write /tmp/$(basename " $1")");}'

# recursive search and replace old with new string, inside files
find . -type f -exec sed -i s/oldstring/newstring/g {} +

# urldecoding
printf $(echo -n $1 | sed 's/\\/\\\\/g;s/\(%\)\([0-9a-fA-F][0-9a-fA-F]\)/\\x\2/g
')

# Checks apache's access_log file, strips the search queries and shoves them up
your e-mail
awk '/q=/{print $11}' /var/log/httpd/access_log.4 | awk -F 'q=' '{print $2}' | s
ed 's/+/ /g;s/%22/"/g;s/q=//' | cut -d "&" -f 1

# Checks apache's access_log file, strips the search queries and shoves them up
your e-mail
cat /var/log/httpd/access_log | grep q= | awk '{print $11}' | awk -F 'q=' '{prin
t $2}' | sed 's/+/ /g;s/%22/"/g;s/q=//' | cut -d "&" -f 1 | mail youremail@isp.c
om -s "[your-site] search strings for `date`"

# Short Information about loaded kernel modules
awk '{print $1}' "/proc/modules" | xargs modinfo | awk '/^(filename|desc|depends
)/'

# Remove an unnecessary suffix from a file name for all files in a directory
for f in $(ls *.xml.skippy); do mv $f `echo $f | sed 's|.skippy||'`; done

# Short Information about loaded kernel modules
modinfo $(cut -d' ' -f1 /proc/modules) | sed '/^dep/s/$/\n/; /^file\|^desc\|^dep
/!d'

# Short Information about loaded kernel modules
lsmod | sed -e '1d' -e 's/\(\([^ ]*\) \)\{1\}.*/\2/' | xargs modinfo | sed -e '/
^dep/s/$/\n/g' -e '/^file/b' -e '/^desc/b' -e '/^dep/b' -e d

# geoip information
geo(){ curl -s "http://www.geody.com/geoip.php?ip=$(dig +short $1)"| sed '/^IP:/
!d;s/<[^>][^>]*>//g'; }

# Show a script or config file without comments
egrep -v "^[[:blank:]]*($|#|//|/\*| \*|\*/)"  somefile

# Show a script or config file without comments
sed -e '/^[[:blank:]]*#/d; s/[[:blank:]][[:blank:]]*#.*//'  -e '/^$/d' -e '/^\/\
/.*/d' -e '/^\/\*/d;/^ \* /d;/^ \*\//d' /a/file/with/comments

# Remove lines that contain a specific pattern($1) from file($2).
sed -i '/myexpression/d' /path/to/file.txt

# geoip information
GeoipLookUp(){ curl -A "Mozilla/5.0" -s "http://www.geody.com/geoip.php?ip=$1" |
 grep "^IP.*$1" | html2text; }

# List the CPU model name
sed -n 's/^model name[ \t]*: *//p' /proc/cpuinfo

# geoip information
curl -s "http://www.geody.com/geoip.php?ip=$(curl -s icanhazip.com)" | sed '/^IP
:/!d;s/<[^>][^>]*>//g'

# Grab an interface's IP from ifconfig without screen clutter
ifconfig eth1 | grep inet\ addr | awk '{print $2}' | cut -d: -f2 | sed s/^/eth1:
\ /g

# Get your external IP address
curl ip.appspot.com

# List your largest installed packages (on Debian/Ubuntu)
sed -ne '/^Package: \(.*\)/{s//\1/;h;};/^Installed-Size:  \(.*\)/{s//\1/;G;s/\n/
 /;p;}' /var/lib/dpkg/status | sort -rn

# Extract a bash function
sed -n '/^function h\(\)/,/^}/p' script.sh


#:111#
# commandlinefu.com by David Winterbottom

# Check for login failures and summarize
zgrep "Failed password" /var/log/auth.log* | awk '{print $9}' | sort | uniq -c |
 sort -nr | less


#:112#
# commandlinefu.com by David Winterbottom

# Find all uses of PHP constants in a set of files
$class=ExampleClass; $path=src; for constant in `grep ' const ' $class.php | awk
 '{print $2;}'`; do grep -r "$class::$constant" $path; done

# Print trending topics on Twitter
curl -s search.twitter.com | awk -F'</?[^>]+>' '/\/intra\/trend\//{print $2}'

# copy working directory and compress it on-the-fly while showing progress
tar -cf - . | pv -s $(du -sb . | awk '{print $1}') | gzip > out.tgz

# random xkcd comic as xml
curl -sL 'dynamic.xkcd.com/comic/random/' | awk -F\" '/^<img/{printf("<?xml vers
ion=\"1.0\"?>\n<xkcd>\n<item>\n <title>%s</title>\n <comment>%s</comment>\n <ima
ge>%s</image>\n</item>\n</xkcd>\n", $6, $4, $2)}'

# View a random xkcd comic
wget -q http://dynamic.xkcd.com/comic/random/ -O-| sed -n '/<img src="http:\/\/i
mgs.xkcd.com\/comics/{s/.*\(http:.*\)" t.*/\1/;p}' | awk '{system ("wget -q " $1
 " -O- | display -title $(basename " $1") -write /tmp/$(basename " $1")");}'

# View the newest xkcd comic.
curl -s 'xkcd.com' | awk -F\" '/^<img/{printf("<?xml version=\"1.0\"?>\n<xkcd>\n
<item>\n <title>%s</title>\n <comment>%s</comment>\n <image>%s</image>\n</item>\
n</xkcd>\n", $6, $4, $2)}'

# Checks apache's access_log file, strips the search queries and shoves them up
your e-mail
awk '/q=/{print $11}' /var/log/httpd/access_log.4 | awk -F 'q=' '{print $2}' | s
ed 's/+/ /g;s/%22/"/g;s/q=//' | cut -d "&" -f 1

# Checks apache's access_log file, strips the search queries and shoves them up
your e-mail
cat /var/log/httpd/access_log | grep q= | awk '{print $11}' | awk -F 'q=' '{prin
t $2}' | sed 's/+/ /g;s/%22/"/g;s/q=//' | cut -d "&" -f 1 | mail youremail@isp.c
om -s "[your-site] search strings for `date`"

# Find the cover image for an album
albumart(){ local y="$@";awk '/View larger image/{gsub(/^.*largeImagePopup\(.|.,
 .*$/,"");print;exit}' <(curl -s 'http://www.albumart.org/index.php?srchkey='${y
// /+}'&itempage=1&newsearch=1&searchindex=Music');}

# Upload images to omploader.org from the command line.
ompload() { curl -F file1=@"$1" http://omploader.org/upload|awk '/Info:|File:|Th
umbnail:|BBCode:/{gsub(/<[^<]*?\/?>/,"");$1=$1;print}';}

# Get ethX mac addresses
ifconfig | awk '/HW/ {print $5}'

# Commit only newly added files to subversion repository
svn ci `svn stat |awk '/^A/{printf $2" "}'`

# Grab an interface's IP from ifconfig without screen clutter
ifconfig eth1 | grep inet\ addr | awk '{print $2}' | cut -d: -f2 | sed s/^/eth1:
\ /g

# Calculating series with awk: add numbers from 1 to 100
awk 'BEGIN {for(i=1;i<=100;i++)sum+=i}; END {print sum}' /dev/null

# Show current folder permission from /, useful for debugging ssh key permission
awk 'BEGIN{dir=DIR?DIR:ENVIRON["PWD"];l=split(dir,parts,"/");last="";for(i=1;i<l
+1;i++){d=last"/"parts[i];gsub("//","/",d);system("ls -ld \""d"\"");last=d}}'

# Visualizing system performance data
(echo "set terminal png;plot '-' u 1:2 t 'cpu' w linespoints;"; sudo vmstat 2 10
 | awk 'NR > 2 {print NR, $13}') | gnuplot > plot.png

# Visualizing system performance data
vmstat 2 10 | awk 'NR > 2 {print NR, $13}' | gnuplot -e "set terminal png;set ou
tput 'v.png';plot '-' u 1:2 t 'cpu' w linespoints;"

# Find and display most recent files using find and perl
find $HOME -type f -print0 | perl -0 -wn -e '@f=<>; foreach $file (@f){ (@el)=(s
tat($file)); push @el, $file; push @files,[ @el ];} @o=sort{$a->[9]<=>$b->[9]} @
files; for $i (0..$#o){print scalar localtime($o[$i][9]), "\t$o[$i][-1]\n";}'|ta
il

# Delete all but the latest 5 files
ls -t | awk 'NR>5 {system("rm \"" $0 "\"")}'

# Display the standard deviation of a column of numbers with awk
awk '{delta = $1 - avg; avg += delta / NR; mean2 += delta * ($1 - avg); } END {
print sqrt(mean2 / NR); }'

# Identify long lines in a file
awk 'length>72' file

# Show directories in the PATH, one per line
echo src::${PATH} | awk 'BEGIN{pwd=ENVIRON["PWD"];RS=":";FS="\n"}!$1{$1=pwd}$1!~
/^\//{$1=pwd"/"$1}{print $1}'

# Make a statistic about the lines of code
find . -name \*.c | xargs wc -l | tail -1 | awk '{print $1}'

# Check your unread Gmail from the command line
curl -u username:password --silent "https://mail.google.com/mail/feed/atom" | tr
 -d '\n' | awk -F '<entry>' '{for (i=2; i<=NF; i++) {print $i}}' | sed -n "s/<ti
tle>\(.*\)<\/title.*name>\(.*\)<\/name>.*/\2 - \1/p"

# Fibonacci numbers with awk
awk 'BEGIN {a=1;b=1;for(i=0;i<'${NUM}';i++){print a;c=a+b;a=b;b=c}}'


#:113#
# commandlinefu.com by David Winterbottom

# Creating shortened URLs from the command line
curl -s http://tinyurl.com/create.php?url=http://<website.url>/ | sed -n 's/.*\(
http:\/\/tinyurl.com\/[a-z0-9][a-z0-9]*\).*/\1/p' | uniq

# count occurences of each word in novel David Copperfield
wget -q -O- http://www.gutenberg.org/dirs/etext96/cprfd10.txt | sed  '1,419d' |
tr "\n" " " | tr " " "\n" | perl -lpe 's/\W//g;$_=lc($_)' | grep "^[a-z]" | awk
'length > 1' | sort | uniq -c | awk '{print $2"\t"$1}'

# Number of open connections per ip.
netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n

# Display duplicated lines in a file
cat file.txt | sort | uniq -dc

# Check for login failures and summarize
zgrep "Failed password" /var/log/auth.log* | awk '{print $9}' | sort | uniq -c |
 sort -nr | less

# Checking total connections to each Ip inserver
netstat -alpn | grep :80 | awk '{print $4}' |awk -F: '{print $(NF-1)}' |sort |
uniq -c | sort -n


#:114#
# commandlinefu.com by David Winterbottom

# Open a file at the specified line
emacs +400 code.py


#:115#
# commandlinefu.com by David Winterbottom

# Displays a 3-Month Calendar
cal -3

# Remind yourself to leave in 15 minutes
leave +15

# Show this month's calendar, with today's date highlighted
cal | grep --before-context 6 --after-context 6 --color -e " $(date +%e)" -e "^$
(date +%e)"


#:116#
# commandlinefu.com by David Winterbottom

# DVD to YouTube ready watermarked MPEG-4 AVI file using mencoder (step 2)
mencoder -sub heading.ssa -subpos 0 -subfont-text-scale 4 -utf8 -oac copy -ovc l
avc -lavcopts vcodec=mpeg4 -vf scale=320:-2,expand=:240:::1 -ffourcc xvid -o out
put.avi dvd.avi

# DVD to YouTube ready watermarked MPEG-4 AVI file using mencoder (step 1)
mencoder -oac mp3lame -lameopts cbr=128 -ovc lavc -lavcopts vcodec=mjpeg -o dvd.
avi dvd://0

# Rip DVD to YouTube ready MPEG-4 AVI file using mencoder
mencoder -oac mp3lame -lameopts cbr=128 -ovc lavc -lavcopts vcodec=mpeg4 -ffourc
c xvid -vf scale=320:-2,expand=:240:::1 -o output.avi dvd://0

# Use heading subtitle file as watermark using mencoder
mencoder -sub heading.ssa -subpos 0 -subfont-text-scale 4 -utf8 -oac mp3lame -la
meopts cbr=128 -ovc lavc -lavcopts vcodec=mjpeg -vf scale=320:-2,expand=:240:::1
 -o output.avi input.flv

# Record audio and video from webcam using mencoder
mencoder tv:// -tv driver=v4l2:width=800:height=600:device=/dev/video0:fps=30:ou
tfmt=yuy2:forceaudio:alsa:adevice=hw.2,0 -ovc lavc -lavcopts vcodec=mpeg4:vbitra
te=1800 -ffourcc xvid -oac mp3lame -lameopts cbr=128 -o output.avi

# Extract audio track from a video file using mencoder
mencoder -of rawaudio -ovc copy -oac mp3lame -o output.mp3 input.avi

# Substitute audio track of video file using mencoder
mencoder -ovc copy -audiofile input.mp3 -oac copy input.avi -o output.avi

# Remove sound from video file using mencoder
mencoder -ovc copy -nosound input.avi -o output.avi

# FLV to AVI with subtitles and forcing audio sync using mencoder
mencoder -sub subs.ssa -utf8 -subfont-text-scale 4 -oac mp3lame -lameopts cbr=12
8 -ovc lavc -lavcopts vcodec=mpeg4 -ffourcc xvid -o output.avi input.flv

# Convert a VMWare screencast into a flv file
mencoder -of avi -ovc lavc movie.avi -o movie2.avi; ffmpeg -i movie2.avi -r 12
-b 100 movie.flv

# Second pass dvd rip... The set of commands was too long, so I had to separate
them into two.
mencoder dvd://<title> -dvd-device <device> -aid 128 -info srcform='ripped by me
ncoder' -oac mp3lame -lameopts abr:br=128 -ovc xvid -xvidencopts pass=2:bitrate=
-700000 -ofps 30000/1001 -o '<outputfile.avi>'

# Encode a file to MPEG4 format
mencoder video.avi lavc -lavcopts vcodec=mpeg4:vbitrate=800 newvideo.avi

# Record camera's output to a avi file
mencoder -tv device=/dev/video1 tv:// -ovc copy -o video.avi

# Extract an audio track from a multilingual video file, for a specific language
.
mencoder -aid 2 -oac copy file.avi -o english.mp3

# Convert a flv video file to avi using mencoder
mencoder your_video.flv -oac mp3lame -ovc xvid -lameopts preset=standard:fast -x
videncopts pass=1 -o your_video.avi

# Remux an avi video if it won't play easily on your media device
mencoder -ovc copy -oac copy -of avi -o remuxed.avi original.avi

# Rotate a video file by 90 degrees CW
mencoder -vf rotate=1 -ovc lavc -oac copy "$1" -o "$1"-rot.avi

# Convert video files to XviD
mencoder "$1" -ofps 23.976 -ovc lavc -oac copy -o "$1".avi


#:117#
# commandlinefu.com by David Winterbottom

# Convert a mp3 file to m4a
mplayer -vo null -vc null -ao pcm:fast:file=file.wav file.mp3; faac -b 128 -c 44
100 -w file.wav

# Rotate a video file by 90 degrees CW
mencoder -vf rotate=1 -ovc lavc -oac copy "$1" -o "$1"-rot.avi

# Convert video files to XviD
mencoder "$1" -ofps 23.976 -ovc lavc -oac copy -o "$1".avi


#:118#
# commandlinefu.com by David Winterbottom

# Find and display most recent files using find and perl
find $HOME -type f -print0 | perl -0 -wn -e '@f=<>; foreach $file (@f){ (@el)=(s
tat($file)); push @el, $file; push @files,[ @el ];} @o=sort{$a->[9]<=>$b->[9]} @
files; for $i (0..$#o){print scalar localtime($o[$i][9]), "\t$o[$i][-1]\n";}'|ta
il

# skipping five lines, at top, then at bottom
seq 1 12 | sed 1,5d ; seq 1 12 | head --lines=-5

# Get Futurama quotations from slashdot.org servers
echo -e "HEAD / HTTP/1.1\nHost: slashdot.org\n\n" | nc slashdot.org 80 | head -n
5 | tail -1 | cut -f2 -d-

# Tail the most recently modified file
ls -t1 | head -n1 | xargs tail -f

# Follow tail by name (fix for rolling logs with tail -f)
tail -F file

# Follow the most recently updated log files
ls -drt /var/log/* | tail -n5 | xargs sudo tail -n0 -f

# get newest jpg picture in a folder
cp `ls -x1tr *.jpg | tail -n 1` newest.jpg

# Monitor logs in Linux using Tail
find /var/log -type f -exec file {} \; | grep 'text' | cut -d' ' -f1 | sed -e's/
:$//g' | grep -v '[0-9]$' | xargs tail -f

# Tail a log file with long lines truncated
tail -f logfile.log | cut -b 1-80

# useful tail on /var/log to avoid old logs or/and gzipped files
tail -f *[!.1][!.gz]

# Check the last 15 package operations (on yum systems)
tail -n 15 /var/log/yum.log | tac


#:119#
# commandlinefu.com by David Winterbottom

# Override and update your locally modified files through cvs..
cvs update -C

# Recursively deletes DIR directories
find . -type d -name DIR -exec rm -r {} \;


#:120#
# commandlinefu.com by David Winterbottom

# Allows incoming traffic from specific IP address to port 80
sudo ufw allow proto tcp from 1.2.3.4 to any port 80


#:121#
# commandlinefu.com by David Winterbottom

# Carriage return for reprinting on the same line
while true; do echo -ne "$(date)\r"; sleep 1; done

# Creating sequence of number with text
seq 10 |xargs -n1 echo Printing line

# Notify Gnome user of files modified today
OLDIFS=$IFS; IFS=$(echo -en "\n\b"); for f in `find -daystart -mtime 0 -type f -
printf "%f\n"`; do notify-send -t 0 "$f downloaded" ; done; IFS=$OLDIFS

# create SQL-statements from textfile with awk
for each in `cut -d " " -f 1 inputfile.txt`; do echo "select * from table where
id = \"$each\";"; done

# Function that outputs dots every second until command completes
sleeper(){ while `ps -p $1 &>/dev/null`; do echo -n "${2:-.}"; sleep ${3:-1}; do
ne; }; export -f sleeper

# Show only existing executable dirs in PATH using only builtin bash commands
for p in ${PATH//:/ }; do [[ -d $p && -x $p ]] && echo $p; done

# Show directories in the PATH, one per line
echo src::${PATH} | awk 'BEGIN{pwd=ENVIRON["PWD"];RS=":";FS="\n"}!$1{$1=pwd}$1!~
/^\//{$1=pwd"/"$1}{print $1}'

# Show directories in the PATH, one per line
echo $PATH | tr \: \\n

# Ultimate current directory usage command
du -a --max-depth=1 | sort -n | cut -d/ -f2 | sed '$d' | while read i; do if [ -
f $i ]; then du -h "$i"; else echo "$(du -h --max-depth=0 "$i")/"; fi; done

# Ultimate current directory usage command
find . -maxdepth 1 -type d|xargs du -a --max-depth=0|sort -rn|cut -d/ -f2|sed '1
d'|while read i;do echo "$(du -h --max-depth=0 "$i")/";done;find . -maxdepth 1 -
type f|xargs du -a|sort -rn|cut -d/ -f2|sed '$d'|while read i;do du -h "$i";done

# power off system in X hours form the current time, here X=2
echo init 0 | at now + 2 hours

# Shows how many percents of all avaliable packages are installed in your gentoo
 system
echo $((`eix --only-names -I | wc -l` * 100 / `eix --only-names | wc -l`))%

# cooking a list of numbers for calculation
echo $( du -sm /var/log/* | cut -f 1 ) | sed 's/ /+/g'

# urlencode
(Command too long..See sample Output..)

# For a $FILE, extracts the path, filename, filename without extension and exten
sion.
FILENAME=`echo ${FILE##*/}`;FILEPATH=`echo ${FILE%/*}`;NOEXT=`echo ${FILENAME%\.
*}`;EXT=`echo ${FILE##*.}`

# A faster ls
echo *

# Number of seconds to certain unix date
echo $( (( $( (2**31 -1) ) - $(date +%s) )) )

# beep when a server goes offline
while true; do [ "$(ping -c1W1w1 server-or-ip.com | awk '/received/ {print $4}')
" != 1 ] && beep; sleep 1; done

# Schedule a download at a later time
echo 'wget url' | at 01:00

# Print text string vertically, one character per line.
echo Print text vertically|sed 's/\(.\)/\1\n/g'


#:122#
# commandlinefu.com by David Winterbottom

# Duplicate several drives concurrently
dd if=/dev/sda | tee >(dd of=/dev/sdb) | dd of=/dev/sdc

# Pipe stdout and stderr, etc., to separate commands
some_command > >(/bin/cmd_for_stdout) 2> >(/bin/cmd_for_stderr)

# Throttling Bandwidth On A Mac
sudo ipfw pipe 1 config bw 50KByte/s;sudo ipfw add 1 pipe 1 src-port 80

# Print text string vertically, one character per line.
echo Print text vertically|sed 's/\(.\)/\1\n/g'


#:123#
# commandlinefu.com by David Winterbottom

# Rename .JPG to .jpg recursively
find /path/to/images -name '*.JPG' -exec bash -c 'mv "$1" "${1/%.JPG/.jpg}"' --
{} \;

# Rename .JPG to .jpg recursively
find /path/to/images -name '*.JPG' -exec rename "s/.JPG/.jpg/g" \{\} \;

# recursive search and replace old with new string, inside files
find . -type f -exec sed -i s/oldstring/newstring/g {} +

# Normalize volume in your mp3 library
find . -type d -exec sh -c "normalize-audio -b \"{}\"/*.mp3" \;

# Find in all files in the current directory, just a find shorthand
grep -H -n "pattern" *

# Find in all files in the current directory, just a find shorthand
find ./ -name $1 -exec grep -H -n $2 '{}' ';'

# List files in tarballs
find <path> -name "*.tgz" -or -name "*.tar.gz" | while read file; do echo "$file
: "; tar -tzf $file; done

# Find files recursively that were updated in the last hour ignoring SVN files a
nd folders.
find . -mmin -60 -not -path "*svn*" -print|more

# Erase empty files
find . -size 0 -exec rm '{}' \;

# backup local MySQL database into a folder and removes older then 5 days backup
s
mysqldump -uUSERNAME -pPASSWORD database | gzip > /path/to/db/files/db-backup-`d
ate +%Y-%m-%d`.sql.gz ;find /path/to/db/files/* -mtime +5 -exec rm {} \;

# Notify Gnome user of files modified today
OLDIFS=$IFS; IFS=$(echo -en "\n\b"); for f in `find -daystart -mtime 0 -type f -
printf "%f\n"`; do notify-send -t 0 "$f downloaded" ; done; IFS=$OLDIFS

# find . -name
find . -name "*.txt" -exec sed -i "s/old/new/" {} \;

# Get the total length of all video / audio in the current dir (and below) in H:
m:s
find -type f -name "*.avi" -print0 | xargs -0  mplayer -vo dummy -ao dummy -iden
tify 2>/dev/null | perl -nle '/ID_LENGTH=([0-9\.]+)/ && ($t +=$1) && printf "%02
d:%02d:%02d\n",$t/3600,$t/60%60,$t%60' | tail -n 1

# find . -name "*.txt" | xargs sed -i "s/old/new/"
find . -name "*.txt" | xargs sed -i "s/old/new/"

# Find and display most recent files using find and perl
find $HOME -type f -print0 | perl -0 -wn -e '@f=<>; foreach $file (@f){ (@el)=(s
tat($file)); push @el, $file; push @files,[ @el ];} @o=sort{$a->[9]<=>$b->[9]} @
files; for $i (0..$#o){print scalar localtime($o[$i][9]), "\t$o[$i][-1]\n";}'|ta
il

# Open files of the same name in TextMate
mate - `find . -name 'filename'`

# find only current directory (universal)
find . \( ! -name . -prune \) \( -type f -o -type l \)

# Ultimate current directory usage command
find . -maxdepth 1 ! -name '.'  -execdir du -0 -s {} + | sort -znr | gawk 'BEGIN
{ORS=RS="\0";} {sub($1 "\t", ""); print $0;}' | xargs -0 du -hs

# Identify differences between directories (possibly on different servers)
diff <(ssh server01 'cd config; find . -type f -exec md5sum {} \;| sort -k 2') <
(ssh server02 'cd config;find . -type f -exec md5sum {} \;| sort -k 2')

# Find running binary executables that were not installed using dpkg
cat /var/lib/dpkg/info/*.list > /tmp/listin ; ls /proc/*/exe |xargs -l readlink
| grep -xvFf /tmp/listin; rm /tmp/listin

# Create a zip file ignoring .svn files
zip -r foo.zip DIR -x "*/.svn/*"

# Create a zip file ignoring .svn files
find . -not \( -name .svn -prune \) -type f | xargs zip XXXXX.zip

# Make a statistic about the lines of code
find . -name \*.c | xargs wc -l | tail -1 | awk '{print $1}'

# Finding files with different extensions
find . -regex '.*\(h\|cpp\)'

# Skip over .svn directories when using the
find . -name .svn -prune -o -print


#:124#
# commandlinefu.com by David Winterbottom

# copy working directory and compress it on-the-fly while showing progress
tar -cf - . | pv -s $(du -sb . | awk '{print $1}') | gzip > out.tgz

# Ultimate current directory usage command
find . -maxdepth 1 ! -name '.'  -execdir du -0 -s {} + | sort -znr | gawk 'BEGIN
{ORS=RS="\0";} {sub($1 "\t", ""); print $0;}' | xargs -0 du -hs

# Ultimate current directory usage command
du -a --max-depth=1 | sort -n | cut -d/ -f2 | sed '$d' | while read i; do if [ -
f $i ]; then du -h "$i"; else echo "$(du -h --max-depth=0 "$i")/"; fi; done

# Ultimate current directory usage command
ncdu

# Duplicate a directory tree using tar and pipes
(cd /source/dir ; tar cv .)|(cd /dest/dir ; tar xv)

# Alternative size (human readable) of files and directories (biggest last)
du -ms * | sort -nk1

# Alternative size (human readable) of directories (biggest last)
function duf { du -sk "$@" | sort -n | while read size fname; do for unit in k M
 G T P E Z Y; do if [ $size -lt 1024 ]; then echo -e "${size}${unit}\t${fname}";
 break; fi; size=$((size/1024)); done; done; }

# Alternative size (human readable) of files and directories (biggest last)
du -ms * .[^.]*| sort -nk1

# Alternative size (human readable) of directories (biggest first)
function duf { du -k $@ | sort -rn | perl -ne '($s,$f)=split(/\t/,$_,2);for(qw(K
 M G T)){if($s<1024){$x=($s<10?"%.1f":"%3d");printf("$x$_\t%s",$s,$f);last};$s/=
1024}' }

# Alternative size (human readable) of directories (biggest first)
du -h -s -x * | sort -g -b -r | less -F

# Find removed files still in use via /proc
find -L /proc/*/fd -links 0 2>/dev/null

# Size(k) of directories(Biggest first)
find . -depth -type d -exec du -s {} \; | sort -k1nr

# find largest file in /var
find /var -mount -ls -xdev | /usr/bin/sort -nr +6 | more

# Find all directories on filesystem containing more than 99MB
du -hS / | perl -ne '(m/\d{3,}M\s+\S/ || m/G\s+\S/) && print'

# do a directory disk usage summary without giving the details for the subdirect
ories
for dir in $(ls); do du -sk ${dir}; done

# List the largest directories & subdirectoties in the current directory sorted
from largest to smallest.
du -k | sort -r -n | more

# Current sub-folders sizes
du -sh *

# Summarize size of all files of given type in all subdirectories (in bytes)
SUM=0; for FILESIZE in `find /tmp -type f -iname \*pdf -exec du -b {} \; 2>/dev/
null | cut -f1` ; do (( SUM += $FILESIZE )) ; done ; echo "sum=$SUM"


#:125#
# commandlinefu.com by David Winterbottom

# List files that DO NOT match a pattern
printf "%s\n" !(pattern) ## ksh, or bash with shopt -s extglob

# List files that DO NOT match a pattern
ls *[^p][^a][^t]* ; # or shopt -s extglob; ls !(*pattern*)

# List files that DO NOT match a pattern
ls | grep -vi pattern

# Find all dot files and directories
ls -d .*

# Find all dot files and directories
echo .*

# Find all dot files and directories
printf "%s\n" .*

# Remove an unnecessary suffix from a file name for all files in a directory
for f in $(ls *.xml.skippy); do mv $f `echo $f | sed 's|.skippy||'`; done

# Pipe ls output into less
function lsless() { ls "$@" | less; }

# Find all dot files and directories
ls -a | egrep "^\.\w"

# Using column to format a directory listing
(printf "PERMISSIONS LINKS OWNER GROUP SIZE MONTH DAY HH:MM PROG-NAME\n" \ ; ls
-l | sed 1d) | column -t

# Delete all but the latest 5 files, ignoring directories
ls -lt|grep ^-|awk 'NR>5 { print $8 }'|xargs -r rm

# Delete all but the latest 5 files
ls -t | tail +6 | xargs rm

# Delete all but the latest 5 files
ls -t | awk 'NR>5 {system("rm \"" $0 "\"")}'

# find the biggest files recursively, no matter how many
find . -type f -printf '%20s %p\n' | sort -n | cut -b22- | tr '\n' '\000' | xarg
s -0 ls -laSr

# Efficient count files in directory (no recursion)
perl -e 'if(opendir D,"."){@a=readdir D;print $#a-1,"\n"}'

# List contents of tar archive within a compressed 7zip archive
7z x -so testfile.tar.7z | tar tvf -

# find the 10 latest (modified) files
ls -1t | head -n10

# get newest jpg picture in a folder
cp `ls -x1tr *.jpg | tail -n 1` newest.jpg

# Mac OS X: Change Color of the ls Command
export LSCOLORS=gxfxcxdxbxegedabagacad

# netstat -p recoded (totaly useless..)
p=$(netstat -nate 2>/dev/null | awk '/LISTEN/ {gsub (/.*:/, "", $4); if ($4 == "
4444") {print $8}}'); for i in $(ls /proc/|grep "^[1-9]"); do [[ $(ls -l /proc/$
i/fd/|grep socket|sed -e 's|.*\[\(.*\)\]|\1|'|grep $p) ]] && cat /proc/$i/cmdlin
e && echo; done

# A faster ls
echo *

# Quick case-insenstive partial filename search
alias lg='ls --color=always | grep --color=always -i'

# Show All Symbolic (Soft) Links
ls -l | grep ^l

# Add some color to ls
eval "`dircolors -b`"

# alias to list hidden files of a folder
alias lh='ls -a | egrep "^\."'


#:126#
# commandlinefu.com by David Winterbottom

# Know when you will type :q in your term instead of vi(m), the alias will chewe
d you out.
alias :q='tput setaf 1; echo >&2 "this is NOT vi(m) :/"; tput sgr0'

# Burn a directory of mp3s to an audio cd.
alias burnaudiocd='mkdir ./temp && for i in *.[Mm][Pp]3;do mpg123 -w "./temp/${i
%%.*}.wav" "$i";done;cdrecord -pad ./temp/* && rm -r ./temp'

# What is my ip?
alias whatismyip="wget -q -O - http://whatismyip.com/automation/n09230945.asp"

# alias to close terminal with :q
alias ':q'='exit'

# Define an alias with a correct completion
old='apt-get'; new="su-${old}"; command="sudo ${old}"; alias "${new}=${command}"
; $( complete | sed -n "s/${old}$/${new}/p" ); alias ${new}; complete -p ${new}

# Alias for getting OpenPGP keys for Launchpad PPAs on Ubuntu
alias launchpadkey="sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-key
s"

# Find if the command has an alias
type -all command

# Kill a daemon by name, not by PID
kill_daemon() { echo "Daemon?"; read dm;  kill -15 $(netstat -atulpe | grep $dm
| cut -d '/' -f1 | awk '{print $9}') }; alias kd='kill_daemon

# Clears Firefox` cache without clicking around
rm_cache() { rm -f $HOME/.mozilla/firefox/<profile>/Cache/* }; alias rmcache='rm
_cache'

# Ultra shortcut for ssh root@
alias s='ssh -l root'

# Create directory named after current date
mkdir $(date +%Y%m%d)

# Quick case-insenstive partial filename search
alias lg='ls --color=always | grep --color=always -i'

# A bash function to show the files most recently modified in the named (or curr
ent) directory
function t { ls -ltch $* | head -20 ; }

# alias to show my own configured ip
alias showip="ifconfig eth0 | grep 'inet addr:' | sed 's/.*addr\:\(.*\) Bcast\:.
*/\1/'"

# Creates a proxy based on tsocks.
alias tproxy='ssh -ND 8118 user@server&; export LD_PRELOAD="/usr/lib/libtsocks.s
o"'

# Shows your WAN IP, when you`re sitting behind a router
alias myip='curl -s www.wieistmeineip.de | egrep -o "[0-9]{1,3}\.[0-9]{1,3}\.[0-
9]{1,3}\.[0-9]{1,3}"'

# Quick alias for playing music.
alias mux='clear && cd ~/Music/ && ls && echo -n "File> " && read msi && mplayer
 ~/Music/$msi'

# alias to list hidden files of a folder
alias lh='ls -a | egrep "^\."'


#:127#
# commandlinefu.com by David Winterbottom

# use the short username by default for network authentication
defaults write /Library/Preferences/com.apple.NetworkAuthorization UseShortName
-bool YES

# Sum of the total resident memory Stainless.app is using.
ps -ec -o command,rss | grep Stainless | awk -F ' ' '{ x = x + $2 } END { print
x/(1024) " MB."}'

# Set default "New Page" as HTML in TextMate
defaults write com.macromates.textmate OakDefaultLanguage 17994EC8-6B1D-11D9-AC3
A-000D93589AF6

# Check your unread Gmail from the command line
curl -u username:password --silent "https://mail.google.com/mail/feed/atom" | tr
 -d '\n' | awk -F '<entry>' '{for (i=2; i<=NF; i++) {print $i}}' | sed -n "s/<ti
tle>\(.*\)<\/title.*name>\(.*\)<\/name>.*/\2 - \1/p"

# Show Mac OS X version information
sw_vers

# Verbosely delete files matching specific name pattern, older than 15 days.
find /backup/directory -name "FILENAME_*" -mtime +15 -exec rm -vf {};

# Verbosely delete files matching specific name pattern, older than 15 days.
find /backup/directory -name "FILENAME_*" -mtime +15 | xargs rm -vf

# Open in TextMate Sidebar files (recursively) with names matching REGEX_A and n
ot matching REGEX_B
mate - `find * -type f -regex 'REGEX_A' | grep -v -E 'REGEX_B'`

# Hiding and Show files on Mac OS X
setfile -a V foo.bar; setfile -a v foo.bar;

# Change Windows Domain password from Linux
smbpasswd -r <domain-server> -U <user name>

# Alert on Mac when server is up
ping -o -i 30 HOSTNAME && osascript -e 'tell app "Terminal" to display dialog "S
erver is up" buttons "It?s about time" default button 1'

# Send Reminders from your Linux Server to Growl on a Mac
remind -z1 -k'echo %s |ssh <user>@<host> "growlnotify"' ~/.reminders &

# Use QuickLook from the command line without verbose output
qlook() { qlmanage -p "$@" >& /dev/null & }

# Paste the contents of OS X clipboard into a new text file
pbpaste > newfile.txt

# Convert "man page" to text file
man ls | col -b > ~/Desktop/man_ls.txt

# Open Finder from the current Terminal location
open .

# Show display type
ioreg -lw0 | grep IODisplayEDID | sed "/[^<]*</s///" | xxd -p -r | strings -6

# Mac Sleep Timer
sudo pmset schedule sleep "08/31/2009 00:00:00"

# sends your internal IP by email
ifconfig en1 | awk '/inet / {print $2}' | mail -s "hello world" email@email.com

# automount samba shares as devices in /mnt/
sudo vi /etc/fstab; Go//smb-share/gino /mnt/place smbfs defaults,username=gino,p
assword=pass 0 0<esc>:wq; mount //smb-share/gino

# Make a DVD ISO Image from a VIDEO_TS folder on MacOSX
hdiutil makehybrid -udf -udf-volume-name DVD_NAME -o MY_DVD.iso /path/


#:128#
# commandlinefu.com by David Winterbottom

# Equivelant of a Wildcard
`ls`

# useful tail on /var/log to avoid old logs or/and gzipped files
tail -f *[!.1][!.gz]


#:129#
# commandlinefu.com by David Winterbottom

# Analyse compressed Apache access logs for the most commonly requested pages
zcat access_log.*.gz | awk '{print $7}' | sort | uniq -c | sort -n | tail -n 20

# Less a grep result, going directly to the first match in the first file
argv=("$@"); rest=${argv[@]:1}; less -JMN +"/$1" `grep -l $1 $rest`

# Log your internet download speed
echo $(date +%s) > start-time; URL=http://www.google.com; while true; do echo $(
curl -L --w %{speed_download} -o/dev/null -s $URL) >> bps; sleep 10; done &

# show the real times iso of epochs for a given column
perl -F' ' -MDate::Format -pale 'substr($_, index($_, $F[1]), length($F[1]), tim
e2str("%C", $F[1]))' file.log

# Follow the most recently updated log files
ls -drt /var/log/* | tail -n5 | xargs sudo tail -n0 -f

# Get all possible problems from any log files
grep -2 -iIr "err\|warn\|fail\|crit" /var/log/*

# gets all files committed to svn by a particular user since a particular date
svn log -v -r{2009-05-21}:HEAD | awk '/^r[0-9]+ / {user=$3} /yms_web/ {if (user=
="george") {print $2}}' | sort | uniq

# Tail a log file with long lines truncated
tail -f logfile.log | cut -b 1-80

# useful tail on /var/log to avoid old logs or/and gzipped files
tail -f *[!.1][!.gz]


#:130#
# commandlinefu.com by David Winterbottom

# Check reverse DNS
nslookup {ip}

# Check reverse DNS
dig +short -x {ip}

# Check reverse DNS
dig -x {IP}

# Check reverse DNS
host {checkIp or hostname} [dns server]

# Get your external IP address
wget -qO - http://www.sputnick-area.net/ip;echo

# Provides external IP, Country and City in a formated manner.
geoip () {  curl -s "http://www.geoiptool.com/?IP=$1" | html2text | egrep --colo
r 'City:|IP Address:|Country:' }

# Get your external IP address
wget -q -O - checkip.dyndns.org|sed -e 's/.*Current IP Address: //' -e 's/<.*$//
'

# Get your external IP address
lynx --dump http://ip.boa.nu|sed -e 's/^[[:space:]]*//' -e 's/*[[:space:]]$//'|g
rep -v ^$

# Get your external IP address
wget -O - -q ip.boa.nu

# Get your external IP address
curl whatismyip.org

# Get your external IP address with the best commandlinefu.com command
eval $(curl -s http://www.commandlinefu.com/commands/matching/external/ZXh0ZXJuY
Ww=/sort-by-votes/plaintext|sed -n '/^# Get your external IP address$/{n;p;q}')

# Get your external IP address with a random commandlinefu.com command
IFS=$'\n';cl=($(curl -s http://www.commandlinefu.com/commands/matching/external/
ZXh0ZXJuYWw=/sort-by-votes/plaintext|sed -n '/^# Get your external IP address$/{
n;p}'));c=${cl[$(( $RANDOM % ${#cl[@]} ))]};eval $c;echo "Command used: $c"

# Get your external IP address
exec 3<>/dev/tcp/whatismyip.com/80; echo -e "GET /automation/n09230945.asp HTTP/
1.0\r\nHost: whatismyip.com\r\n" >&3; a=( $(cat <&3) ); echo ${a[${#a[*]}-1]};

# Get your external IP address
echo -e "GET /automation/n09230945.asp HTTP/1.0\r\nHost: whatismyip.com\r\n" | n
c whatismyip.com 80 | tail -n1

# What is my ip?
alias whatismyip="wget -q -O - http://whatismyip.com/automation/n09230945.asp"

# regex to match an ip
echo 127.0.0.1 | egrep -e '^(([01]?[0-9]{1,2}|2[0-4][0-9]|25[0-4])\.){3}([01]?[0
-9]{1,2}|2[0-4][0-9]|25[0-4])$'

# regex to match an ip
perl -wlne 'print $1 if /(([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25
[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5]))/' iplist

# regex to match an ip
echo 254.003.032.3 | grep -P '^((25[0-4]|2[0-4]\d|[01]?[\d]?[1-9])\.){3}(25[0-4]
|2[0-4]\d|[01]?[\d]?[1-9])$'

# regex to match an ip
echo "123.32.12.134" | grep -P '([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4
]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])'

# Get internal and external IP addresses
ips(){ for if in ${1:-$(ip link list|grep '^.: '|cut -d\  -f2|cut -d: -f1)};do c
ur=$(ifconfig $if|grep "inet addr"|sed 's/.*inet addr:\([0-9\.]*\).*/\1/g');prin
tf '%-5s%-15s%-15s\n' $if $cur $(nc -s $cur sine.cluenet.org 128 2>/dev/null||ec
ho $cur);done;}

# Get all IPs via ifconfig
ifconfig -a | perl -nle'/(\d+\.\d+\.\d+\.\d+)/ && print $1'

# Read just the IP address of a device
/sbin/ifconfig eth0 | grep "inet addr" | sed -e 's/.*inet addr:\(.*\) B.*/\1/g'

# Read just the IP address of a device
ifconfig $DEVICE | perl -lne '/inet addr:([\d.]+)/ and print $1'

# Test if the given argument is a valid ip address.
perl -e '$p=qr!(?:0|1\d{0,2}|2(?:[0-4]\d?|5[0-5]?|[6-9])?|[3-9]\d?)!;print((shif
t=~m/^$p\.$p\.$p\.$p$/)?1:0);' 123.123.123.123

# Update your OpenDNS network ip
wget -q --user=<username> --password=<password> 'https://updates.opendns.com/nic
/update?hostname=your_opendns_hostname&myip=your_ip' -O -


#:131#
# commandlinefu.com by David Winterbottom

# Get the IP address of a machine. Just the IP, no junk.
/sbin/ifconfig -a | awk '/(cast)/ { print $2 }' | cut -d':' -f2 | head -1

# get all the data about your IP configuration across all network cards
ipconfig /all


#:132#
# commandlinefu.com by David Winterbottom

# copy partition table from /dev/sda to /dev/sdb
sfdisk -d /dev/sda | sed 's/sda/sdb/g' | sfdisk /dev/sdb

# copy partition table from /dev/sda to /dev/sdb
sfdisk /dev/sdb <(sfdisk -d /dev/sda| perl -pi -e 's/sda/sdb/g')

# Mount a partition from within a complete disk dump
lomount -diskimage /path/to/your/backup.img -partition 1 /mnt/foo

# Mount a partition from within a complete disk dump
INFILE=/path/to/your/backup.img; MOUNTPT=/mnt/foo; PARTITION=1; mount "$INFILE"
"$MOUNTPT" -o loop,offset=$[ `/sbin/sfdisk -d "$INFILE" | grep "start=" | head -
n $PARTITION | tail -n1 | sed 's/.*start=[ ]*//' | sed 's/,.*//'` * 512 ]


#:133#
# commandlinefu.com by David Winterbottom

# Mount a partition from within a complete disk dump
lomount -diskimage /path/to/your/backup.img -partition 1 /mnt/foo

# Find corrupted jpeg image files
find . -name "*jpg" -exec jpeginfo -c {} \; | grep -E "WARNING|ERROR"

# sync a directory of corrupted jpeg with a source directory
for i in *jpg; do jpeginfo -c $i | grep -E "WARNING|ERROR" | cut -d " " -f 1 | x
args -I '{}' find /mnt/sourcerep -name {} -type f -print0 | xargs -0 -I '{}' cp
-f {} ./ ; done

# Mount a partition from within a complete disk dump
INFILE=/path/to/your/backup.img; MOUNTPT=/mnt/foo; PARTITION=1; mount "$INFILE"
"$MOUNTPT" -o loop,offset=$[ `/sbin/sfdisk -d "$INFILE" | grep "start=" | head -
n $PARTITION | tail -n1 | sed 's/.*start=[ ]*//' | sed 's/,.*//'` * 512 ]


#:134#
# commandlinefu.com by David Winterbottom

# copy partition table from /dev/sda to /dev/sdb
sfdisk -d /dev/sda | sed 's/sda/sdb/g' | sfdisk /dev/sdb

# copy partition table from /dev/sda to /dev/sdb
sfdisk /dev/sdb <(sfdisk -d /dev/sda| perl -pi -e 's/sda/sdb/g')

# Mount a partition from within a complete disk dump
lomount -diskimage /path/to/your/backup.img -partition 1 /mnt/foo

# Show all detected mountable Drives/Partitions/BlockDevices
hwinfo --block --short

# Mount a partition from within a complete disk dump
INFILE=/path/to/your/backup.img; MOUNTPT=/mnt/foo; PARTITION=1; mount "$INFILE"
"$MOUNTPT" -o loop,offset=$[ `/sbin/sfdisk -d "$INFILE" | grep "start=" | head -
n $PARTITION | tail -n1 | sed 's/.*start=[ ]*//' | sed 's/,.*//'` * 512 ]


#:135#
# commandlinefu.com by David Winterbottom

# Mount a partition from within a complete disk dump
lomount -diskimage /path/to/your/backup.img -partition 1 /mnt/foo

# Mount a partition from within a complete disk dump
INFILE=/path/to/your/backup.img; MOUNTPT=/mnt/foo; PARTITION=1; mount "$INFILE"
"$MOUNTPT" -o loop,offset=$[ `/sbin/sfdisk -d "$INFILE" | grep "start=" | head -
n $PARTITION | tail -n1 | sed 's/.*start=[ ]*//' | sed 's/,.*//'` * 512 ]


#:136#
# commandlinefu.com by David Winterbottom

# (Git) Revert files with changed mode, not content
git diff --numstat | awk '{if ($1 == "0" && $1 == "0") print $3}'  | xargs git c
heckout HEAD

# Mount a partition from within a complete disk dump
lomount -diskimage /path/to/your/backup.img -partition 1 /mnt/foo

# Mount a partition from within a complete disk dump
INFILE=/path/to/your/backup.img; MOUNTPT=/mnt/foo; PARTITION=1; mount "$INFILE"
"$MOUNTPT" -o loop,offset=$[ `/sbin/sfdisk -d "$INFILE" | grep "start=" | head -
n $PARTITION | tail -n1 | sed 's/.*start=[ ]*//' | sed 's/,.*//'` * 512 ]


#:137#
# commandlinefu.com by David Winterbottom

# unrar all part1 files in a directory
ls -1 *.part1.rar | xargs -d '\n' -L 1 unrar e


#:138#
# commandlinefu.com by David Winterbottom

# Search for available software on a debian package system (Ubuntu)
aptitude search NAME

# How to know the total number of packages available
apt-cache stats

# Cap apt-get download speed
sudo apt-get -o Acquire::http::Dl-Limit=25 install <package>

# purge installed but unused linux headers, image, or modules
dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/\(.*\)-\([^0-9]\+\)/\1/"
)"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d' | xargs sudo apt-get -y purge

# Remove packages by pattern on debian and based systems
sudo apt-get remove --purge `dpkg -l | awk '{print $2}' | grep gnome` && apt-get
 autoremove

# Remove apps with style: nuke it from orbit
function nuke() { if [ $(whoami) != "root" ] ; then for x in $@; do sudo apt-get
 autoremove --purge $x; done; else for x in $@; do apt-get autoremove --purge $x
; done; fi }

# Install the Debian-packaged version of a Perl module
function dpan () { PKG=`perl -e '$_=lc($ARGV[0]); s/::/-/g; print "lib$_-perl\n"
' $1`; apt-get install $PKG; }

# Run a complete update unattended on Debian based GNU/Linux distros.
sudo apt-get update && sudo apt-get dist-upgrade -y


#:139#
# commandlinefu.com by David Winterbottom

# Delete all files found in directory A from directory B
for file in <directory A>/*; do rm <directory B>/`basename $file`; done

# Delete all files in current directory that have been modified less than 5 days
 ago.
find ./ -mtime -5 | xargs rm -f

# Delete files older than..
find /dir_name -mtime +5 -exec rm {} \


#:140#
# commandlinefu.com by David Winterbottom

# List of reverse DNS records for a subnet
nmap -R -sL 209.85.229.99/27 | awk '{if($3=="not")print"("$2") no PTR";else prin
t$3" is "$2}' | grep '('

# find all active IP addresses in a network
nmap -sP 192.168.0.*

# checks if host /service is up on a host that doesn't respond to ping
while true; do clear; nmap ${hostname} -PN -p ${hostport}; sleep 5; done

# Scan your LAN for unauthorized IPs
diff <(nmap -sP 192.168.1.0/24 | grep ^Host | sed 's/.appears to be up.//g' | se
d 's/Host //g') auth.hosts | sed 's/[0-9][a-z,A-Z][0-9]$//' | sed 's/</UNAUTHORI
ZED IP -/g'

# Basic Local Port Scan
[command too long]


#:141#
# commandlinefu.com by David Winterbottom

# Check a server is up. If it isn't mail me.
curl -fs brandx.jp.sme 2&>1 > /dev/null || echo brandx.jp.sme ping failed | mail
 -ne -s'Server unavailable' joker@jp.co.uk

# Check a server is up. If it isn't mail me.
ping -q -c1 -w3 brandx.jp.sme 2&>1 /dev/null || echo brandx.jp.sme ping failed |
 mail -ne -s'Server unavailable' joker@jp.co.uk

# ping a host until it responds, then play a sound, then exit
beepwhenup () { echo 'Enter host you want to ping:'; read PHOST; if [[ "$PHOST"
== "" ]]; then exit; fi; while true; do ping -c1 -W2 $PHOST 2>&1 >/dev/null; if
[[ "$?" == "0" ]]; then for j in $(seq 1 4); do beep; done; ping -c1 $PHOST; bre
ak; fi; done; }

# Ping sweep without NMAP
for i in `seq 1 255`; do ping -c 1 10.10.10.$i | tr \\n ' ' | awk '/1 received/
{print $2}'; done

# Alert on Mac when server is up
ping -o -i 30 HOSTNAME && osascript -e 'tell app "Terminal" to display dialog "S
erver is up" buttons "It?s about time" default button 1'

# beep when a server goes offline
while true; do [ "$(ping -c1W1w1 server-or-ip.com | awk '/received/ {print $4}')
" != 1 ] && beep; sleep 1; done

# Basic Local Port Scan
[command too long]


#:142#
# commandlinefu.com by David Winterbottom

# Free unused memory currently unavailable
dd if=/dev/zero of=junk bs=1M count=1K

# A fun thing to do with ram is actually open it up and take a peek. This comman
d will show you all the string (plain text) values in ram
sudo strings /dev/mem

# A fun thing to do with ram is actually open it up and take a peek. This comman
d will show you all the string (plain text) values in ram
strings /dev/mem|less

# Browse system RAM in a human readable form
sudo cat /proc/kcore | strings | awk 'length > 20' | less


#:143#
# commandlinefu.com by David Winterbottom

# for loop with leading zero in bash 3
seq -s " " -w 3 20

# for loop with leading zero in bash 3
printf "%02u " {3..20}; echo

# for loop with leading zero in bash 3
for i in {0..1}{0..9}; do echo $i; done

# Sort a character string
echo sortmeplease|sed 's/./&\n/g'|sort|tr -d '\n'

# Sort a character string
echo sortmeplease | awk '{l=split($1,a,"");asort(a);while(x<=l){printf "%s",a[x]
;x++ }print "";}'

# A fun thing to do with ram is actually open it up and take a peek. This comman
d will show you all the string (plain text) values in ram
sudo strings /dev/mem

# A fun thing to do with ram is actually open it up and take a peek. This comman
d will show you all the string (plain text) values in ram
strings /dev/mem|less

# Browse system RAM in a human readable form
sudo cat /proc/kcore | strings | awk 'length > 20' | less


#:144#
# commandlinefu.com by David Winterbottom

# FLV to AVI with subtitles and forcing audio sync using mencoder
mencoder -sub subs.ssa -utf8 -subfont-text-scale 4 -oac mp3lame -lameopts cbr=12
8 -ovc lavc -lavcopts vcodec=mpeg4 -ffourcc xvid -o output.avi input.flv

# Convert a VMWare screencast into a flv file
mencoder -of avi -ovc lavc movie.avi -o movie2.avi; ffmpeg -i movie2.avi -r 12
-b 100 movie.flv

# Download Youtube Playlist
y=http://www.youtube.com;for i in $(curl -s $f|grep -o "url='$y/watch?v=[^']*'")
;do d=$(echo $i|sed "s;url\='$y/watch?v=\(.*\)';\1;");wget -O $d.flv "$y/get_vid
eo.php?video_id=$d&t=$(curl -s "$y/watch?v=$d"|sed -n 's/.*, "t": "\([^"]*\)", .
*/\1/p')";done

# Stream YouTube URL directly to mplayer
mplayer -fs $(echo "http://youtube.com/get_video.php?$(curl -s $youtube_url | se
d -n 's/.*", "video_id": "\([^"]*\)", ".*", "t": "\([^"]*\)", .*/video_id=\1\&t=
\2/p')")

# Stream YouTube URL directly to mplayer.
mplayer -fs $(echo "http://youtube.com/get_video.php?$(curl -s $youtube_url | se
d -n "/watch_fullscreen/s;.*\(video_id.\+\)&title.*;\1;p")")


#:145#
# commandlinefu.com by David Winterbottom

# Stream YouTube URL directly to mplayer
mplayer -fs $(echo "http://youtube.com/get_video.php?$(curl -s $youtube_url | se
d -n 's/.*", "video_id": "\([^"]*\)", ".*", "t": "\([^"]*\)", .*/video_id=\1\&t=
\2/p')")

# Bash Alias That Plays Music from SomaFM
alias somafm='read -p "Which station? "; mplayer --reallyquiet -vo none -ao sdl
http://somafm.com/startstream=${REPLY}.pls'

# Plays Music from SomaFM
read -p "Which station? "; mplayer --reallyquiet -vo none -ao sdl http://somafm.
com/startstream=${REPLY}.pls

# Stream YouTube URL directly to mplayer.
mplayer -fs $(echo "http://youtube.com/get_video.php?$(curl -s $youtube_url | se
d -n "/watch_fullscreen/s;.*\(video_id.\+\)&title.*;\1;p")")


#:146#
# commandlinefu.com by David Winterbottom

# Stream YouTube URL directly to mplayer
mplayer -fs $(echo "http://youtube.com/get_video.php?$(curl -s $youtube_url | se
d -n 's/.*", "video_id": "\([^"]*\)", ".*", "t": "\([^"]*\)", .*/video_id=\1\&t=
\2/p')")

# Stream YouTube URL directly to mplayer.
mplayer -fs $(echo "http://youtube.com/get_video.php?$(curl -s $youtube_url | se
d -n "/watch_fullscreen/s;.*\(video_id.\+\)&title.*;\1;p")")


#:147#
# commandlinefu.com by David Winterbottom

# Another Matrix Style Implementation
echo -ne "\e[32m" ; while true ; do echo -ne "\e[$(($RANDOM % 2 + 1))m" ; tr -c
"[:print:]" " " < /dev/urandom | dd count=1 bs=50 2> /dev/null ; done

# Random colours at random locations
p(){ printf "\033[%d;%dH\033[4%dm \033[m" $((RANDOM%LINES+1)) $((RANDOM%COLUMNS+
1)) $((RANDOM%8)); }; clear;while :;do p; sleep .001;done

# Another Matrix Style Implementation
COL=$(( $(tput cols) / 2 )); clear; tput setaf 2; while :; do tput cup $((RANDOM
%COL)) $((RANDOM%COL)); printf "%$((RANDOM%COL))s" $((RANDOM%2)); done

# hanukkah colored bash prompt
export PS1="\e[0;34m[\u\e[0;34m@\h[\e[0;33m\w\e[0m\e[0m\e[0;34m]#\e[0m "

# Unbelievable Shell Colors, Shading, Backgrounds, Effects for Non-X
for c in `seq 0 255`;do t=5;[[ $c -lt 108 ]]&&t=0;for i in `seq $t 5`;do echo -e
 "\e[0;48;$i;${c}m|| $i:$c `seq -s+0 $(($COLUMNS/2))|tr -d '[0-9]'`\e[0m";done;d
one

# Remove color codes (special characters) with sed
sed -r "s/\x1B\[([0-9]{1,3}((;[0-9]{1,3})*)?)?[m|K]//g

# tail, with specific pattern colored
tail -F file | egrep --color 'pattern|$'

# tail, with specific pattern colored
tail -f file | egrep --color=always $\|PATTERN

# colored tail
tail -f FILE | grep --color=always KEYWORD

# Matrix Style
check the sample output below, the command was too long :(

# Matrix Style
echo -e "\e[32m"; while :; do for i in {1..16}; do r="$(($RANDOM % 2))"; if [[ $
(($RANDOM % 5)) == 1 ]]; then if [[ $(($RANDOM % 4)) == 1 ]]; then v+="\e[1m $r
  "; else v+="\e[2m $r   "; fi; else v+="     "; fi; done; echo -e "$v"; v=""; d
one

# Colorized grep in less
ack --pager='less -r'

# Adding Color Escape Codes to global CC array for use by echo -e
declare -ax CC; for i in `seq 0 7`;do ii=$(($i+7)); CC[$i]="\033[1;3${i}m"; CC[$
ii]="\033[0;3${i}m"; done

# get colorful side-by-side diffs of files in svn with vim
vimdiff <(svn cat "$1") "$1"

# Matrix Style
while true ; do IFS="" read i; echo "$i"; sleep .01; done < <(tr -c "[:digit:]"
" " < /dev/urandom | dd cbs=$COLUMNS conv=unblock | GREP_COLOR="1;32" grep --col
or "[^ ]")

# Matrix Style
echo -e "\e[31m"; while $t; do for i in `seq 1 30`;do r="$[($RANDOM % 2)]";h="$[
($RANDOM % 4)]";if [ $h -eq 1 ]; then v="\e[1m $r";else v="\e[2m $r";fi;v2="$v2
$v";done;echo -e $v2;v2="";done;

# Matrix Style
while $t; do for i in `seq 1 30`;do r="$[($RANDOM % 2)]";h="$[($RANDOM % 4)]";if
 [ $h -eq 1 ]; then v="\e[1m $r";else v="\e[2m $r";fi;v2="$v2 $v";done;echo -e $
v2;v2="";done;

# permanently let grep colorize its output
echo alias grep=\'grep --color=auto\' >> ~/.bashrc ; . ~/.bashrc

# Print a great grey scale demo !
yes "$(seq 232 255;seq 254 -1 233)" | while read i; do printf "\x1b[48;5;${i}m\n
"; sleep .01; done

# Matrix Style
LC_ALL=C tr -c "[:digit:]" " " < /dev/urandom | dd cbs=$COLUMNS conv=unblock | G
REP_COLOR="1;32" grep --color "[^ ]"

# Matrix Style
tr -c "[:digit:]" " " < /dev/urandom | dd cbs=$COLUMNS conv=unblock | GREP_COLOR
="1;32" grep --color "[^ ]"

# Colored SVN diff
svn diff <file> | vim -R -

# Colorized grep in less
grep --color=always | less -R

# Quick case-insenstive partial filename search
alias lg='ls --color=always | grep --color=always -i'

# colored prompt
export PS1='\[\033[0;35m\]\h\[\033[0;33m\] \w\[\033[00m\]: '


#:148#
# commandlinefu.com by David Winterbottom

# Rename .JPG to .jpg recursively
find /path/to/images -name '*.JPG' -exec bash -c 'mv "$1" "${1/%.JPG/.jpg}"' --
{} \;

# Remove an unnecessary suffix from a file name for all files in a directory
for f in $(ls *.xml.skippy); do mv $f `echo $f | sed 's|.skippy||'`; done

# renombrar un archivo que inicia con guion
find . -name "-help" -exec mv {} help.txt \;

# Uniformly correct filenames in a directory
for i in  *;do mv "$i" "$(echo $i | sed s/PROBLEM/FIX/g)";done

# Smart renaming
ls | sed -n -r 's/banana_(.*)_([0-9]*).asc/mv & banana_\2_\1.asc/gp' | sh

# Replace spaces with '_' in filenames
find -depth . | (while read FULLPATH; do BASENAME=`basename "${FULLPATH}"`; DIRN
AME=`dirname "${FULLPATH}"`; mv "${DIRNAME}/${BASENAME}" "${DIRNAME}/${BASENAME/
/ /_}"; done)

# Move a file up a directory.
mv file_name.extension ..


#:149#
# commandlinefu.com by David Winterbottom

# Keep from having to adjust your volume constantly
find . -iname \*.mp3 -print0 | xargs -0 mp3gain -krd 6 && vorbisgain -rfs .


#:150#
# commandlinefu.com by David Winterbottom

# Keep from having to adjust your volume constantly
find . -iname \*.mp3 -print0 | xargs -0 mp3gain -krd 6 && vorbisgain -rfs .


#:151#
# commandlinefu.com by David Winterbottom

# Find jpeg images and copy them to a central location
find . -iname "*.jpg" -print0 | tr '[A-Z]' '[a-z]' | xargs -0 cp --backup=number
ed -dp -u --target-directory {location} &

# Short Information about loaded kernel modules
awk '{print $1}' "/proc/modules" | xargs modinfo | awk '/^(filename|desc|depends
)/'

# Short Information about loaded kernel modules
modinfo $(cut -d' ' -f1 /proc/modules) | sed '/^dep/s/$/\n/; /^file\|^desc\|^dep
/!d'

# Short Information about loaded kernel modules
lsmod | sed -e '1d' -e 's/\(\([^ ]*\) \)\{1\}.*/\2/' | xargs modinfo | sed -e '/
^dep/s/$/\n/g' -e '/^file/b' -e '/^desc/b' -e '/^dep/b' -e d

# Short Information about loaded kernel modules
lsmod | cut -d' ' -f1 | xargs modinfo | egrep '^file|^desc|^dep' | sed -e'/^dep/
s/$/\n/g'

# Create subdirectory and move files into it
(ls; mkdir subdir; echo subdir) | xargs mv

# Creating sequence of number with text
seq 10 |xargs -n1 echo Printing line

# FAST and NICE Search and Replace for Strings in Files
nice -n19 sh -c 'S=askapache && R=htaccess; find . -type f|xargs -P5 -iFF grep -
l -m1 "$S" FF|xargs -P5 -iFF sed -i -e s%${S}%${R}% FF'

# find . -name
find . -name "*.txt" -exec sed -i "s/old/new/" {} \;

# find . -name "*.txt" | xargs sed -i "s/old/new/"
find . -name "*.txt" | xargs sed -i "s/old/new/"

# Find and display most recent files using find and perl
find $HOME -type f -print0 | perl -0 -wn -e '@f=<>; foreach $file (@f){ (@el)=(s
tat($file)); push @el, $file; push @files,[ @el ];} @o=sort{$a->[9]<=>$b->[9]} @
files; for $i (0..$#o){print scalar localtime($o[$i][9]), "\t$o[$i][-1]\n";}'|ta
il

# Ultimate current directory usage command
find . -maxdepth 1 ! -name '.'  -execdir du -0 -s {} + | sort -znr | gawk 'BEGIN
{ORS=RS="\0";} {sub($1 "\t", ""); print $0;}' | xargs -0 du -hs

# Ultimate current directory usage command
find . -maxdepth 1 -type d|xargs du -a --max-depth=0|sort -rn|cut -d/ -f2|sed '1
d'|while read i;do echo "$(du -h --max-depth=0 "$i")/";done;find . -maxdepth 1 -
type f|xargs du -a|sort -rn|cut -d/ -f2|sed '$d'|while read i;do du -h "$i";done

# locate a filename, make sure it exists and display it with full details
locate -e somefile | xargs ls -l

# grep certain file types recursively
find . -name "*.[ch]" | xargs grep "TODO"

# grep (or anything else) many files with multiprocessor power
find . -type f -print0 | xargs -0 -P 4 -n 40 grep -i foobar

# Search through files, ignoring .svn (less accurate/slower but easier to rememb
er)
find . ! -path \*.svn\*

# Search through files, ignoring .svn
find . -not \( -name .svn -prune \) -type f -print0 | xargs --null grep <searchT
erm>

# purge installed but unused linux headers, image, or modules
dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/\(.*\)-\([^0-9]\+\)/\1/"
)"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d' | xargs sudo apt-get -y purge

# change ownership en masse of files owned by a specific user, including files a
nd directories with spaces
find . -uid 0 -print0 | xargs -0 chown foo:foo

# remove unneeded configuration files in debian
dpkg-query -l| grep -v "ii " | grep "rc " | awk '{print $2" "}' | tr -d "\n" | x
args aptitude purge -y

# Add 10 random unrated songs to xmms2 playlist
xmms2 mlib search NOT +rating | grep -r '^[0-9]' | sed -r 's/^([0-9]+).*/\1/' |
sort -R | head | xargs -L 1 xmms2 addid

# sync svn working copy and remote repository (auto adding new files)
svn status | grep '^?' | awk '{ print $2; }' | xargs svn add

# Delete more than one month old thumbnails from home directory
find  ~/.thumbnails/ -type f -atime +30 -print0 | xargs -0 rm

# Use find to get around Argument list too long problem
find . -name 'junkfiles-*' -print0 | xargs -0 rm


#:152#
# commandlinefu.com by David Winterbottom

# View a random xkcd comic
wget -q http://dynamic.xkcd.com/comic/random/ -O-| sed -n '/<img src="http:\/\/i
mgs.xkcd.com\/comics/{s/.*\(http:.*\)" t.*/\1/;p}' | awk '{system ("wget -q " $1
 " -O- | display -title $(basename " $1") -write /tmp/$(basename " $1")");}'

# View the newest xkcd comic.
wget `lynx --dump http://xkcd.com/|grep png`

# What is my ip?
alias whatismyip="wget -q -O - http://whatismyip.com/automation/n09230945.asp"

# Check if a .no domain is available
check_dns_no() { for i in $* ; do if `wget -O - -q http://www.norid.no/domenenav
nbaser/whois/?query=$i.no | grep "no match" &>/dev/null` ; then echo $i.no "avai
lable" ; fi ; sleep 1 ;done }

# backup all your commandlinefu.com favourites to a plaintext file
clfavs(){ URL="http://www.commandlinefu.com";wget -O - --save-cookies c --post-d
ata "username=$1&password=$2&submit=Let+me+in" $URL/users/signin;for i in `seq 0
 25 $3`;do wget -O - --load-cookies c $URL/commands/favourites/plaintext/$i >>$4
;done;rm -f c;}

# random xkcd comic
display "$(wget -q http://dynamic.xkcd.com/comic/random/ -O - | grep -Po '(?<=")
http://imgs.xkcd.com/comics/[^"]+(png|jpg)')"

# Run remote web page, but don't save the results
wget -q --spider http://server/cgi/script

# Run remote web page, but don't save the results
wget -O /dev/null http://www.google.com

# Put the machine to sleep after the download(wget) is done
while [ -n "`pgrep wget`" ]; do sleep 2 ;done; [ -e "/tmp/nosleep"] || echo  mem
 >/sys/power/state

# Grab all .flv files from a webpage to the current working directory
wget `lynx -dump http://www.ebow.com/ebowtube.php | grep .flv$ | sed 's/[[:blank
:]]\+[[:digit:]]\+\. //g'`

# get events from google calendar for a given dates range
wget -q -O - 'URL/full?orderby=starttime&singleevents=true&start-min=2009-06-01&
start-max=2009-07-31' |  perl -lane '@m=$_=~m/<title type=.text.>(.+?)</g;@a=$_=
~m/startTime=.(2009.+?)T/g;shift @m;for ($i=0;$i<@m;$i++){ print $m[$i].",".$a[$
i];}';

# count occurences of each word in novel David Copperfield
wget -q -O- http://www.gutenberg.org/dirs/etext96/cprfd10.txt | sed  '1,419d' |
tr "\n" " " | tr " " "\n" | perl -lpe 's/\W//g;$_=lc($_)' | grep "^[a-z]" | awk
'length > 1' | sort | uniq -c | awk '{print $2"\t"$1}'

# backup your entire hosted website using cPanel backup interface and wget
wget --http-user=YourUsername --http-password=YourPassword http://YourWebsiteUrl
:2082/getbackup/backup-YourWebsiteUrl-`date +"%-m-%d-%Y"`.tar.gz

# Download from Rapidshare Premium using wget - Part 2
wget -c -t 1 --load-cookies ~/.cookies/rapidshare <URL>

# Download from Rapidshare Premium using wget - Part 1
wget --save-cookies ~/.cookies/rapidshare --post-data "login=USERNAME&password=P
ASSWORD" -O - https://ssl.rapidshare.com/cgi-bin/premiumzone.cgi > /dev/null

# Get own public IP address
wget -qO- whatismyip.org

# add a gpg key to aptitute package manager in a ubuntu system
wget -q http://xyz.gpg -O- | sudo  apt-key add -

# Schedule a download at a later time
echo 'wget url' | at 01:00

# Download an entire ftp directory using wget
wget -r ftp://user:pass@ftp.example.com


#:153#
# commandlinefu.com by David Winterbottom

# WARNING FORK BOMB! Use at your own risk.
b=\' c=\\ a='yes $( echo b=$c$b c=$c$c a=$b$a$b; echo $a ) | bash &'; yes $( ech
o b=$c$b c=$c$c a=$b$a$b; echo $a ) | bash &


#:154#
# commandlinefu.com by David Winterbottom

# live ssh network throughput test
yes | pv | ssh $host "cat > /dev/null"

# Repeatedly send a string to stdout-- useful for going through "yes I agree" sc
reens
yes "text" | annoying_installer_program # "text" defaults to the letter y

# WARNING FORK BOMB! Use at your own risk.
b=\' c=\\ a='yes $( echo b=$c$b c=$c$c a=$b$a$b; echo $a ) | bash &'; yes $( ech
o b=$c$b c=$c$c a=$b$a$b; echo $a ) | bash &


#:155#
# commandlinefu.com by David Winterbottom

# WARNING FORK BOMB! Use at your own risk.
b=\' c=\\ a='yes $( echo b=$c$b c=$c$c a=$b$a$b; echo $a ) | bash &'; yes $( ech
o b=$c$b c=$c$c a=$b$a$b; echo $a ) | bash &


#:156#
# commandlinefu.com by David Winterbottom

# Activate on-the-fly GTK accels
gconftool-2 -t bool -s /desktop/gnome/interface/can_change_accels true


#:157#
# commandlinefu.com by David Winterbottom

# Clean your broken terminal
stty sane

# Unbelievable Shell Colors, Shading, Backgrounds, Effects for Non-X
for c in `seq 0 255`;do t=5;[[ $c -lt 108 ]]&&t=0;for i in `seq $t 5`;do echo -e
 "\e[0;48;$i;${c}m|| $i:$c `seq -s+0 $(($COLUMNS/2))|tr -d '[0-9]'`\e[0m";done;d
one

# Password Generation
pwgen --alt-phonics --capitalize 9 10

# Show current pathname in title of terminal
export PROMPT_COMMAND='echo -ne "\033]0;${PWD/#$HOME/~}\007";'

# Start a terminal with three open tabs
gnome-terminal --tab --tab --tab

# Display a cool clock on your terminal
watch -t -n1 "date +%T|figlet"

# Convert "man page" to text file
man ls | col -b > ~/Desktop/man_ls.txt

# Open Finder from the current Terminal location
open .

# Share a terminal screen with others
% screen -r someuser/

# ls to show hidden file, but not . or ..
ls -A

# Fast command-line directory browsing
function cdls { cd $1; ls; }


#:158#
# commandlinefu.com by David Winterbottom

# Converts to PDF all the OpenOffice.org files in the directory
for i in $(ls *.od{tp]); do unoconv -f pdf $i; done


#:159#
# commandlinefu.com by David Winterbottom

# Convert decimal numbers to binary
function decToBin { echo "ibase=10; obase=2; $1" | bc; }

# Binary Clock
watch -n 1 'echo "obase=2;`date +%s`" | bc'

# Create a list of binary numbers
echo {0..1}{0..1}{0..1}{0..1}

# Binary injection
echo -n $HEXBYTES | xxd -r -p | dd of=$FILE seek=$((0x$OFFSET)) bs=1 conv=notrun
c


#:160#
# commandlinefu.com by David Winterbottom

# Hexadecimal dump of a file, pipe, or anything
cat testfile | hexdump -C

# Binary injection
echo -n $HEXBYTES | xxd -r -p | dd of=$FILE seek=$((0x$OFFSET)) bs=1 conv=notrun
c


#:161#
# commandlinefu.com by David Winterbottom

# Postpone a command [zsh]
<alt+q>

# Add Password Protection to a file your editing in vim.
vim -x <FILENAME>

# Binary editor
bvi [binary-file]

# Binary injection
echo -n $HEXBYTES | xxd -r -p | dd of=$FILE seek=$((0x$OFFSET)) bs=1 conv=notrun
c


#:162#
# commandlinefu.com by David Winterbottom

# Binary injection
echo -n $HEXBYTES | xxd -r -p | dd of=$FILE seek=$((0x$OFFSET)) bs=1 conv=notrun
c


#:163#
# commandlinefu.com by David Winterbottom

# Find all uses of PHP constants in a set of files
$class=ExampleClass; $path=src; for constant in `grep ' const ' $class.php | awk
 '{print $2;}'`; do grep -r "$class::$constant" $path; done

# Find the location of the currently loaded php.ini file
php -i | grep php.ini

# Extract all urls from the last firefox sessionstore.js file used.
sed -e 's/{"url":/\n&/g' ~/.mozilla/firefox/*/sessionstore.js | cut -d\" -f4

# Extract all urls from the last firefox sessionstore.js file used.
grep -oP '"url":"\K[^"]+' $(ls -t ~/.mozilla/firefox/*/sessionstore.js | sed q)

# Show local/public IP adresses with or without interface argument using a shell
 function for Linux and MacOsX
MyIps(){ echo -e "local:\n$(ifconfig $1 | grep -oP 'inet (add?r:)?\K(\d{1,3}\.){
3}\d{1,3}')\n\npublic:\n$(curl -s sputnick-area.net/ip)"; }

# List files that DO NOT match a pattern
printf "%s\n" !(pattern) ## ksh, or bash with shopt -s extglob

# List files that DO NOT match a pattern
ls *[^p][^a][^t]* ; # or shopt -s extglob; ls !(*pattern*)

# List files that DO NOT match a pattern
ls | grep -vi pattern

# Checks apache's access_log file, strips the search queries and shoves them up
your e-mail
cat /var/log/httpd/access_log | grep q= | awk '{print $11}' | awk -F 'q=' '{prin
t $2}' | sed 's/+/ /g;s/%22/"/g;s/q=//' | cut -d "&" -f 1 | mail youremail@isp.c
om -s "[your-site] search strings for `date`"

# Count emails in an MBOX file
grep -c '^From ' mbox_file

# List the CPU model name
grep "model name" /proc/cpuinfo

# Grab an interface's IP from ifconfig without screen clutter
ifconfig eth1 | grep inet\ addr | awk '{print $2}' | cut -d: -f2 | sed s/^/eth1:
\ /g

# List bash functions defined in .bash_profile or .bashrc
set | fgrep " ()"

# Less a grep result, going directly to the first match in the first file
argv=("$@"); rest=${argv[@]:1}; less -JMN +"/$1" `grep -l $1 $rest`

# Display the history and optionally grep
h() { if [ -z "$1" ]; then history; else history | grep "$@"; fi; }

# FAST and NICE Search and Replace for Strings in Files
nice -n19 sh -c 'S=askapache && R=htaccess; find . -type f|xargs -P5 -iFF grep -
l -m1 "$S" FF|xargs -P5 -iFF sed -i -e s%${S}%${R}% FF'

# Colorized grep in less
ack --pager='less -r'

# Search for a <pattern> string inside all files in the current directory
grep -RnisI <pattern> *

# Track X Window events in chosen window
xev -id `xwininfo | grep 'Window id' | awk '{print $4}'`

# Show apps that use internet connection at the moment. (Multi-Language)
ss -p

# Show apps that use internet connection at the moment.
lsof -P -i -n | cut -f 1 -d " "| uniq | tail -n +2

# Show apps that use internet connection at the moment. (Multi-Language)
lsof -P -i -n

# Show apps that use internet connection at the moment. (Multi-Language)
netstat -lantp | grep -i stab | awk -F/ '{print $2}' | sort | uniq

# Show apps that use internet connection at the moment.
netstat -lantp | grep -i establ | awk -F/ '{print $2}' | sort | uniq

# Show apps that use internet connection at the moment.
netstat -lantp | grep -i establ | awk -F/ '{print $2}' | uniq | sort


#:164#
# commandlinefu.com by David Winterbottom

# Display IP adress of the given interface in a most portable and reliable way.
That should works on many platforms.
x=IO::Interface::Simple; perl -e 'use '$x';' &>/dev/null || cpan -i "$x"; perl -
e 'use '$x'; my $ip='$x'->new($ARGV[0]); print $ip->address,$/;' <INTERFACE>

# Install the Debian-packaged version of a Perl module
function dpan () { PKG=`perl -e '$_=lc($ARGV[0]); s/::/-/g; print "lib$_-perl\n"
' $1`; apt-get install $PKG; }


#:165#
# commandlinefu.com by David Winterbottom

# Output Detailed Process Tree for any User
psu(){ command ps -Hcl -F S f -u ${1:-$USER}; }

# Make the "tree" command pretty and useful by default
alias tree="tree -CAFa -I 'CVS|*.*.package|.svn|.git' --dirsfirst"

# simulates the DOS tree command that you might be missing on your Mac or Linux
box
find . -print | sed -e 's;[^/]*/;|____;g;s;____|; |;g'


#:166#
# commandlinefu.com by David Winterbottom

# simulates the DOS tree command that you might be missing on your Mac or Linux
box
find . -print | sed -e 's;[^/]*/;|____;g;s;____|; |;g'


#:167#
# commandlinefu.com by David Winterbottom

# Remove the boot loader from a usb stick
dd if=/dev/zero of=/dev/sdb bs=446 count=1

# Convert your favorite image in xpm for using in grub
convert image123.png -colors 14 -resize 640x480 grubimg.xpm


#:168#
# commandlinefu.com by David Winterbottom

# Quickly (soft-)reboot skipping hardware checks
/sbin/kexec -l /boot/$KERNEL --append="$KERNELPARAMTERS" --initrd=/boot/$INITRD;
 sync; /sbin/kexec -e

# Remove the boot loader from a usb stick
dd if=/dev/zero of=/dev/sdb bs=446 count=1

# Convert your favorite image in xpm for using in grub
convert image123.png -colors 14 -resize 640x480 grubimg.xpm


#:169#
# commandlinefu.com by David Winterbottom

# Display kernel profile of currently executing functions in Solaris.
lockstat -I -i 977 -s 30 -h sleep 1 > /tmp/profile.out


#:170#
# commandlinefu.com by David Winterbottom

# Display kernel profile of currently executing functions in Solaris.
lockstat -I -i 977 -s 30 -h sleep 1 > /tmp/profile.out


#:171#
# commandlinefu.com by David Winterbottom

# view certificate details
openssl x509 -in filename.crt -noout -text

# generate random password
openssl rand -base64 1000 | tr "[:upper:]" "[:lower:]" | tr -cd "[:alnum:]" | tr
 -d "lo" | cut -c 1-8 | pbcopy

# Encrypted archive with openssl and tar
openssl des3 -salt -in unencrypted-data.tar -out encrypted-data.tar.des3

# Connect to SMTP server using STARTTLS
openssl s_client -starttls smtp -crlf -connect 127.0.0.1:25

# Output a SSL certificate start or end date
date --date="$(openssl x509 -in xxxxxx.crt -noout -startdate | cut -d= -f 2)" --
iso-8601

# Encrypted archive with openssl and tar
tar c folder_to_encrypt | openssl enc -aes-256-cbc -e > secret.tar.enc

# c_rehash replacement
for file in *.pem; do ln -s $file `openssl x509 -hash -noout -in $file`.0; done

# Create a P12 file, using OpenSSL
openssl pkcs12 -export -in /dir/CERTIFICATE.pem -inkey /dir/KEY.pem -certfile /d
ir/CA-cert.pem -name "certName" -out /dir/certName.p12


#:172#
# commandlinefu.com by David Winterbottom

# Create a P12 file, using OpenSSL
openssl pkcs12 -export -in /dir/CERTIFICATE.pem -inkey /dir/KEY.pem -certfile /d
ir/CA-cert.pem -name "certName" -out /dir/certName.p12


#:173#
# commandlinefu.com by David Winterbottom

# c_rehash replacement
for file in *.pem; do ln -s $file `openssl x509 -hash -noout -in $file`.0; done

# Create a P12 file, using OpenSSL
openssl pkcs12 -export -in /dir/CERTIFICATE.pem -inkey /dir/KEY.pem -certfile /d
ir/CA-cert.pem -name "certName" -out /dir/certName.p12


#:174#
# commandlinefu.com by David Winterbottom

# Create a P12 file, using OpenSSL
openssl pkcs12 -export -in /dir/CERTIFICATE.pem -inkey /dir/KEY.pem -certfile /d
ir/CA-cert.pem -name "certName" -out /dir/certName.p12


#:175#
# commandlinefu.com by David Winterbottom

# Create a P12 file, using OpenSSL
openssl pkcs12 -export -in /dir/CERTIFICATE.pem -inkey /dir/KEY.pem -certfile /d
ir/CA-cert.pem -name "certName" -out /dir/certName.p12


#:176#
# commandlinefu.com by David Winterbottom

# Safely store your gpg key passphrase.
pwsafe -qa "gpg keys"."$(finger `whoami` | grep Name | awk '{ print $4" "$5 }')"

# Create a P12 file, using OpenSSL
openssl pkcs12 -export -in /dir/CERTIFICATE.pem -inkey /dir/KEY.pem -certfile /d
ir/CA-cert.pem -name "certName" -out /dir/certName.p12


#:177#
# commandlinefu.com by David Winterbottom

# Create a P12 file, using OpenSSL
openssl pkcs12 -export -in /dir/CERTIFICATE.pem -inkey /dir/KEY.pem -certfile /d
ir/CA-cert.pem -name "certName" -out /dir/certName.p12


#:178#
# commandlinefu.com by David Winterbottom

# iso-8859-1 to utf-8 safe recursive rename
detox -r -s utf_8 /path/to/old/win/files/dir


#:179#
# commandlinefu.com by David Winterbottom

# concatenate avi files
avimerge -o output.avi -i file1.avi file2.avi file3.avi

# remove audio trac from a video file
mencoder -ovc copy -nosound ./movie.mov -o ./movie_mute.mov

# Combine all .mpeg files in current directory into one big one.
cat *.mpg > all.mpg

# convert a .wmv to a .avi
mencoder "/path/to/file.wmv" -ofps 23.976 -ovc lavc -oac copy -o "/path/to/file.
avi"

# Remux an avi video if it won't play easily on your media device
mencoder -ovc copy -oac copy -of avi -o remuxed.avi original.avi

# Cut out a piece of film from a file. Choose an arbitrary length and starting t
ime.
ffmpeg -vcodec copy -acodec copy -i orginalfile -ss 00:01:30 -t 0:0:20 newfile


#:180#
# commandlinefu.com by David Winterbottom

# Extract audio from Mythtv recording to Rockbox iPod using ffmpeg
ffmpeg -ss 0:58:15 -i DavidLettermanBlackCrowes.mpg -acodec copy DavidLettermanB
lackCrowes.ac3

# Convert a VMWare screencast into a flv file
mencoder -of avi -ovc lavc movie.avi -o movie2.avi; ffmpeg -i movie2.avi -r 12
-b 100 movie.flv

# Record a webcam output into a video file.
ffmpeg -an -f video4linux -s 320x240 -b 800k -r 15 -i /dev/v4l/video0 -vcodec mp
eg4 myvideo.avi

# Encode a file to MPEG4 format
mencoder video.avi lavc -lavcopts vcodec=mpeg4:vbitrate=800 newvideo.avi

# Record camera's output to a avi file
mencoder -tv device=/dev/video1 tv:// -ovc copy -o video.avi

# extracting audio and video from a movie
ffmpeg -i source_movie.flv -vcodec mpeg2video target_video.m2v -acodec copy targ
et_audio.mp3

# removing syncronization problems between audio and video
ffmpeg -i source_audio.mp3 -itsoffset 00:00:10.2 -i source_video.m2v target_vide
o.flv

# Create a video that is supported by youtube
ffmpeg -i mymovie.mpg -ar 22050 -acodec libmp3lame -ab 32K -r 25 -s 320x240 -vco
dec flv mytarget.flv

# Copy the sound content of a video to an mp3 file
ffmpeg -i source.flv -vn acodec copy destination.mp3

# create an mp3 with variable bitrate
lame -h -V 6 track9.wav track9.mp3

# Extract track 9 from a CD
mplayer -fs cdda://9 -ao pcm:file=track9.wav

# Cut out a piece of film from a file. Choose an arbitrary length and starting t
ime.
ffmpeg -vcodec copy -acodec copy -i orginalfile -ss 00:01:30 -t 0:0:20 newfile


#:181#
# commandlinefu.com by David Winterbottom

# Create date based backups
backup() { for i in "$@"; do cp -va $i $i.$(date +%Y%m%d-%H%M%S); done }

# Copy a folder tree through ssh using compression (no temporary files)
ssh <host> 'tar -cz /<folder>/<subfolder>' | tar -xvz

# Copy structure
structcp(){ ( mkdir -pv $2;f="$(realpath "$1")";t="$(realpath "$2")";cd "$f";fin
d * -type d -exec mkdir -pv $t/{} \;);}

# Batch file name renaming (copying or moving) w/ glob matching.
for x in *.ex1; do mv "${x}" "${x%ex1}ex2"; done

# Copy files from list with hierarchy
cat files.txt | xargs tar -cv | tar -x -c $DIR/

# Copy with progress
copy(){ cp -v "$1" "$2"&watch -n 1 'du -h "$1" "$2";printf "%s%%\n" $(echo `du -
h "$2"|cut -dG -f1`/0.`du -h "$1"|cut -dG -f1`|bc)';}

# sync a directory of corrupted jpeg with a source directory
for i in *jpg; do jpeginfo -c $i | grep -E "WARNING|ERROR" | cut -d " " -f 1 | x
args -I '{}' find /mnt/sourcerep -name {} -type f -print0 | xargs -0 -I '{}' cp
-f {} ./ ; done

# Copy files and directories from a remote machine to the local machine
ssh user@host "(cd /path/to/remote/top/dir ; tar cvf - ./*)" | tar xvf -

# Remote copy directories and files through an SSH tunnel host
rsync -avz -e 'ssh -A sshproxy ssh' srcdir remhost:dest/path/

# Copy all files. All normal files, all hidden files and all files starting with
 - (minus).
cp ./* .[!.]* ..?* /path/to/dir


#:182#
# commandlinefu.com by David Winterbottom

# Find all files <10MB and sum up their size
i=0; for f in $(find ./ -size -10M -exec stat -c %s {} \; ); do i=$(($i + $f));
done; echo $i

# Count the total number of files in each immediate subdirectory
ps -ef | grep pmon

# Count the total number of files in each immediate subdirectory
find . -type f -printf "%h\n" | cut -d/ -f-2 | sort | uniq -c | sort -rn

# List all text files (exclude binary files)
find . -type f -exec file {} \; | grep ".*: .* text" | cut -f 1 -d :

# List all text files (exclude binary files)
find . | xargs file | grep ".*: .* text" | sed "s;\(.*\): .* text.*;\1;"

# move a lot of files over ssh
rsync -az /home/user/test user@sshServer:/tmp/

# move a lot of files over ssh
tar -cf - /home/user/test | gzip -c | ssh user@sshServer 'cd /tmp; tar xfz -'

# list and sort files by size in reverse order (file size in human readable outp
ut)
ls -S -lhr

# Append output to the beginning of a file.
command > tmp && cat logfile.txt >> tmp && tmp > logfile.txt && rm tmp

# Copy all files. All normal files, all hidden files and all files starting with
 - (minus).
cp ./* .[!.]* ..?* /path/to/dir


#:183#
# commandlinefu.com by David Winterbottom

# Copy all files. All normal files, all hidden files and all files starting with
 - (minus).
cp ./* .[!.]* ..?* /path/to/dir


#:184#
# commandlinefu.com by David Winterbottom

# Pause Current Thread
ctrl-z


#:185#
# commandlinefu.com by David Winterbottom

# View the newest xkcd comic.
wget `lynx --dump http://xkcd.com/|grep png`

# Grab all .flv files from a webpage to the current working directory
wget `lynx -dump http://www.ebow.com/ebowtube.php | grep .flv$ | sed 's/[[:blank
:]]\+[[:digit:]]\+\. //g'`

# Get Futurama quotations from slashdot.org servers
lynx -head -dump http://slashdot.org|egrep 'Bender|Fry'|sed 's/X-//'

# print random commandlinefu.com submission
lynx -source http://www.commandlinefu.com/commands/random | sed 's/<[^>]*>//g' |
  head -1037 | tail -10 | sed -e 's/^[ \t]*//' | sed '/^$/d' | head -2

# Working random fact generator
lynx -dump randomfunfacts.com | grep -A 3 U | sed 1D

# Use lynx to run repeating website actions
lynx -accept_all_cookies -cmd_script=/your/keystroke-file


#:186#
# commandlinefu.com by David Winterbottom

# This command will tell the last login and reboot related information
last

# Prevent non-root users from logging in
touch /etc/nologin

# Use lynx to run repeating website actions
lynx -accept_all_cookies -cmd_script=/your/keystroke-file


#:187#
# commandlinefu.com by David Winterbottom

# Schedule a script or command in x num hours, silently run in the background ev
en if logged out
echo "nohup command rm -rf /phpsessions 1>&2 &>/dev/null 1>&2 &>/dev/null&" | at
 now + 3 hours 1>&2 &>/dev/null

# The Chronic: run a command every N seconds in the background
chronic () { t=$1; shift; while true; do $@; sleep $t; done & }

# ensure your ssh tunnel will always be up (add in crontab)
[[ $(COLUMNS=200 ps faux | awk '/grep/ {next} /ssh -N -R 4444/ {i++} END {print
i}') ]] || nohup ssh -N -R 4444:localhost:22 user@relay &

# Use lynx to run repeating website actions
lynx -accept_all_cookies -cmd_script=/your/keystroke-file


#:188#
# commandlinefu.com by David Winterbottom

# Execute a command with a timeout
timeout 10 sleep 11

# Job Control
^Z $bg $disown


#:189#
# commandlinefu.com by David Winterbottom

# Execute a command with a timeout
timeout 10 sleep 11

# Job Control
^Z $bg $disown


#:190#
# commandlinefu.com by David Winterbottom

# Job Control
^Z $bg $disown


#:191#
# commandlinefu.com by David Winterbottom

# Quickly Encrypt a file with gnupg and email it with mailx
cat private-file | gpg2 --encrypt --armor --recipient "Disposable Key" | mailx -
s "Email Subject" user@email.com

# Encrypted archive with openssl and tar
openssl des3 -salt -in unencrypted-data.tar -out encrypted-data.tar.des3

# Create Encrypted WordPress MySQL Backup without any DB details, just the wp-co
nfig.php
eval $(sed -e "s/^d[^D]*DB_\([NUPH]\).*',[^']*'\([^']*\)'.*/_\1='\2';/" -e "/^_/
!d" wp-config.php) && mysqldump --opt --add-drop-table -u$_U -p$_P -h$_H $_N | g
pg -er AskApache >`date +%m%d%y-%H%M.$_N.sqls`

# Encrypted archive with openssl and tar
tar c folder_to_encrypt | openssl enc -aes-256-cbc -e > secret.tar.enc

# en/decrypts files in a specific directory
for a in path/* ; do ccenrypt -K <password> $a; done

# Safely store your gpg key passphrase.
pwsafe -qa "gpg keys"."$(finger `whoami` | grep Name | awk '{ print $4" "$5 }')"

# Add Password Protection to a file your editing in vim.
vim -x <FILENAME>

# Quickly generate an MD5 hash for a text string using OpenSSL
echo -n 'text to be encrypted' | openssl md5


#:192#
# commandlinefu.com by David Winterbottom

# Transfer SSH public key to another machine in one step
ssh-keygen; ssh-copy-id user@host; ssh user@host


#:193#
# commandlinefu.com by David Winterbottom

# change exif data in all jpeg's
for f in *.jpg; do exif --ifd=0 --tag=0x0110 --set-value="LOMO LC-A" --output=$f
 $f; exif --ifd=0 --tag=0x010f --set-value="LOMO" --output=$f $f;       done }

# set timestamp in exif of a image
exiv2 -M"set Exif.Photo.DateTimeOriginal `date "+%Y:%m:%d %H:%M:%S"`" filename.j
pg


#:194#
# commandlinefu.com by David Winterbottom

# Batch image resize
for a in `ls`; do echo $a && convert $a -resize <Width>x<Height> $a; done

# Find corrupted jpeg image files
find . -name "*jpg" -exec jpeginfo -c {} \; | grep -E "WARNING|ERROR"

# batch convert Nikon RAW (nef) images to JPG
ufraw-batch --out-type=jpeg --out-path=./jpg ./*.NEF

# set timestamp in exif of a image
exiv2 -M"set Exif.Photo.DateTimeOriginal `date "+%Y:%m:%d %H:%M:%S"`" filename.j
pg


#:195#
# commandlinefu.com by David Winterbottom

# find largest file in /var
find /var -mount -ls -xdev | /usr/bin/sort -nr +6 | more

# List the largest directories & subdirectoties in the current directory sorted
from largest to smallest.
du -k | sort -r -n | more


#:196#
# commandlinefu.com by David Winterbottom

# hanukkah colored bash prompt
export PS1="\e[0;34m[\u\e[0;34m@\h[\e[0;33m\w\e[0m\e[0m\e[0;34m]#\e[0m "

# Execute a command before display the bash prompt
PROMPT_COMMAND=command

# colored prompt
export PS1='\[\033[0;35m\]\h\[\033[0;33m\] \w\[\033[00m\]: '


#:197#
# commandlinefu.com by David Winterbottom

# Leave a comment when voting down..
if [ "${vote}" = "down" ]; then echo leave comment; fi


#:198#
# commandlinefu.com by David Winterbottom

# Leave a comment when voting down..
if [ "${vote}" = "down" ]; then echo leave comment; fi


#:199#
# commandlinefu.com by David Winterbottom

# Comment out a line in a file
sed -i '19375 s/^/#/' file

# Easy and fast access to often executed commands that are very long and complex
.
some_very_long_and_complex_command # label

# uncomment the lines where the word DEBUG is found
sed '/^#.*DEBUG.*/ s/^#//' $FILE

# Leave a comment when voting down..
if [ "${vote}" = "down" ]; then echo leave comment; fi


#:200#
# commandlinefu.com by David Winterbottom

# Leave a comment when voting down..
if [ "${vote}" = "down" ]; then echo leave comment; fi


#:201#
# commandlinefu.com by David Winterbottom

# Overloading unix system until crash
echo && :(){ :|:& };:

# recursive search and replace old with new string, inside files
$rpl -R oldstring newstring folder

# Convert encoding of given files from one encoding to another
iconv -f utf8 -t utf16 /path/to/file

# Easily decode unix-time (funtion)
utime(){ perl -e "print localtime($1).\"\n\"";}

# Add user to group on OS X 10.5
sudo dscl localhost -append /Local/Default/Groups/admin GroupMembership username

# Cleanup firefox's database.
find ~/Library/Application\ Support/Firefox/ -type f -name "*.sqlite" -exec sqli
te3 {} VACUUM \;

# Cleanup firefox's database.
find ~/.mozilla/firefox/ -type f -name "*.sqlite" -exec sqlite3 {} VACUUM \;

# Verbosely delete files matching specific name pattern, older than 15 days.
find /backup/directory -name "FILENAME_*" -mtime +15 -exec rm -vf {};

# Verbosely delete files matching specific name pattern, older than 15 days.
rm -vf /backup/directory/**/FILENAME_*(m+15)

# Verbosely delete files matching specific name pattern, older than 15 days.
find /backup/directory -name "FILENAME_*" -mtime +15 | xargs rm -vf

# Cleanup firefox's database.
pgrep -u `id -u` firefox-bin || find ~/.mozilla/firefox -name '*.sqlite'|(while
read -e f; do echo 'vacuum;'|sqlite3 "$f" ; done)

# Remove ^M characters at end of lines in vi
:%s/^V^M//g

# Display a cool clock on your terminal
watch -t -n1 "date +%T|figlet"

# See smbstatus all the time
while (( $i != 0 )) { smbstatus; sleep 5; clear }

# Working random fact generator
lynx -dump randomfunfacts.com | grep -A 3 U | sed 1D

# automount samba shares as devices in /mnt/
sudo vi /etc/fstab; Go//smb-share/gino /mnt/place smbfs defaults,username=gino,p
assword=pass 0 0<esc>:wq; mount //smb-share/gino

# Display all installed ISO/IEC 8859 manpages
for i in $(seq 1 11) 13 14 15 16; do man iso-8859-$i; done

# Dump HTTP header using wget
wget --server-response --spider http://www.example.com/

# Dump HTTP header using lynx or w3m
lynx -dump -head http://www.example.com/

# Copy input sent to a command to stderr
rev <<< 'lorem ipsum' | tee /dev/stderr | rev

# Rot13 using the tr command
alias rot13="tr '[A-Za-z]' '[N-ZA-Mn-za-m]'"

# Not so simple countdown from a given date
watch -tn1 'bc<<<"`date -d'\''friday 21:00'\'' +%s`-`date +%s`"|perl -ne'\''@p=g
mtime($_);printf("%dd %02d:%02d:%02d\n",@p[7,2,1,0]);'\'

# Easily create and share X screen shots (remote webserver version)
scrot -e 'mv $f \$HOME/shots/; sitecopy -u shots; echo "\$BASE/$f" | xsel -i; fe
h `xsel -o`'

# Easily create and share X screen shots (local webserver version)
scrot -e 'mv $f \$HOME/public_html/shots/; echo "http://\$HOSTNAME/~\$USER/shots
/$f" | xsel -i; feh `xsel -o`'

# Display information sent by browser
nc -l 8000


#:202#
# commandlinefu.com by David Winterbottom

# Display IP adress of the given interface in a most portable and reliable way.
That should works on many platforms.
x=IO::Interface::Simple; perl -e 'use '$x';' &>/dev/null || cpan -i "$x"; perl -
e 'use '$x'; my $ip='$x'->new($ARGV[0]); print $ip->address,$/;' <INTERFACE>

# Make sure a script is run in a terminal.
[ -t 0 ] || exit 1

# Make sure a script is run in a terminal.
tty > /dev/null 2>&1 || { aplay error.wav ; exit 1 ;}

# Enable cd by variable names
shopt -s cdable_vars

# Makes a project directory, unless it exists; changes into the dir, and creates
 an empty git repository, all in one command
gitstart () { if ! [[ -d "$@" ]]; then mkdir -p "$@" && cd "$@" && git init; els
e cd "$@" && git init; fi }

# run command with opposite return code
not () { "$@" && return 1 || return 0; }

# Remove all files but one starting with a letter(s)
rm -rf [a-bd-zA-Z0-9]* c[b-zA-Z0-9]*

# Check variable has been set
: ${VAR:?unset variable}

# search for a file in PATH
type <filename>

# search for a file in PATH
which <filename>

# search for a file in PATH
for L in `echo :$PATH | tr : '\n'`; do F=${L:-"."}/fileName; if [ -f ${F} -o -h
${F} ]; then echo ${F}; break; fi; done

# fetch all revisions of a specific file in an SVN repository
svn log fileName | sed -ne "/^r\([0-9][0-9]*\).*/{;s//\1/;s/.*/svn cat fileName@
& > fileName.r&/p;}" | sh -s

# rkhunter (Rootkit Hunter) is a Unix-based tool that scans for rootkits, backdo
ors and possible local exploits. rkhunter is a shell script which carries out va
rious checks on the local system to try and detect known rootkits and malware. I
t also performs c
rkhunter --check

# Check the backdoors and security.chkrootkit is a tool to locally check for sig
ns of a rootkit.
chkrootkit -x | less

# To find how Apache has been compiled from commandline
httpd2 -V

# Another way to see the network interfaces
ip addr show

# Get the information about the Apache loaded modules from command line
httpd2 -M

# This command will tell the last login and reboot related information
last

# How to check webserver by Nikto
nikto.pl -h yourwebserver

# how to run firefox in safe mode from command line
firefox --safe-mode

# How to run a specific command in remote server by ssh
ssh user@remotehost [anycommand](i.e uptime,w)

# Securely edit the sudo file over the network
visudo

# Securely look at the group file over the network
vigr

# Securely seeing the password file over the network
vipw

# securely locate file and dir
slocate filename/dirname


#:203#
# commandlinefu.com by David Winterbottom

# cd up a number of levels
function ..(){ for ((j=${1:-1},i=0;i<j;i++));do builtin cd ..;done;}

# Burn a directory of mp3s to an audio cd.
alias burnaudiocd='mkdir ./temp && for i in *.[Mm][Pp]3;do mpg123 -w "./temp/${i
%%.*}.wav" "$i";done;cdrecord -pad ./temp/* && rm -r ./temp'

# Go up multiple levels of directories quickly and easily.
alias ..="cd .." ...="cd ../.." ....="cd ../../.."

# Go up multiple levels of directories quickly and easily.
alias ..="cd .."; alias ...="cd ../.."; alias ....="cd ../../.."

# Go up multiple levels of directories quickly and easily.
cd() { if [[ "$1" =~ ^\.\.+$ ]];then local a dir;a=${#1};while [ $a -ne 1 ];do d
ir=${dir}"../";((a--));done;builtin cd $dir;else builtin cd "$@";fi ;}

# Get absolut path to your bash-script
script_path=$(cd $(dirname $0);pwd)

# Create a directory and change into it at the same time
md () { mkdir -p "$@" && cd "$@"; }

# Add a directory with a name to /etc/passwd to get quick access using cd ~name
function qcd { useradd -No -s /bin/false -u 999 -g 999 -lf -1 -d $1 $2 ; }

# go to home directory
cd

# Quicker move to parent directory
alias ..='cd ..'


#:204#
# commandlinefu.com by David Winterbottom


#:205#
# commandlinefu.com by David Winterbottom

# Revert back all files currently checked out by Perforce SCM for edit
ropened='p4 opened | awk -F# "{print \$1}" | p4 -x - revert'

# Print the list of all files checked out by Perforce SCM
alias opened='p4 opened | awk -F# "{print \$1}"'


#:206#
# commandlinefu.com by David Winterbottom

# Stage only portions of the changes to a file.
git add --patch <filename>

# Revert back all files currently checked out by Perforce SCM for edit
ropened='p4 opened | awk -F# "{print \$1}" | p4 -x - revert'

# Print the list of all files checked out by Perforce SCM
alias opened='p4 opened | awk -F# "{print \$1}"'

# Execute AccuRev pop command to retrieve missing files from a workspace.
accurev stat -M -fl | awk '{print "\"" $0 "\""}' | xargs accurev pop


#:207#
# commandlinefu.com by David Winterbottom

# Revert back all files currently checked out by Perforce SCM for edit
ropened='p4 opened | awk -F# "{print \$1}" | p4 -x - revert'

# Print the list of all files checked out by Perforce SCM
alias opened='p4 opened | awk -F# "{print \$1}"'


#:208#
# commandlinefu.com by David Winterbottom

# Using column to format a directory listing
(printf "PERMISSIONS LINKS OWNER GROUP SIZE MONTH DAY HH:MM PROG-NAME\n" \ ; ls
-l | sed 1d) | column -t

# Print text string vertically, one character per line.
echo "vertical text" | fold -1

# Print text string vertically, one character per line.
echo "vertical text" | grep -o '.'

# Sum columns from CSV column $COL
perl -F',' -ane '$a += $F[3]; END { print $a }' test.csv

# Sum columns from CSV column $COL
awk -F ',' '{ x = x + $4 } END { print x }' test.csv

# currently mounted filesystems in nice layout
column -t /proc/mounts

# Sum columns from CSV column $COL
perl  -ne 'split /,/ ; $a+= $_[3]; END {print $a."\n";}' -f ./file.csv

# currently mounted filesystems in nice layout
mount | column -t


#:209#
# commandlinefu.com by David Winterbottom

# Add another tty device using mknod command
sudo mknod /dev/ttyS4 c 4 68

# Configure a serial line device so you can evaluate it with a shell script
stty -F "/dev/ttyUSB0" 9600 ignbrk -brkint -icrnl -imaxbel -opost -onlcr -isig -
icanon -iexten -echo -echoe -echok -echoctl -echoke time 5 min 1 line 0


#:210#
# commandlinefu.com by David Winterbottom

# Configure a serial line device so you can evaluate it with a shell script
stty -F "/dev/ttyUSB0" 9600 ignbrk -brkint -icrnl -imaxbel -opost -onlcr -isig -
icanon -iexten -echo -echoe -echok -echoctl -echoke time 5 min 1 line 0


#:211#
# commandlinefu.com by David Winterbottom

# Press Any Key to Continue
read enterKey

# bash screensaver (scrolling ascii art with customizable message)
while [ 1 ]; do banner 'ze missiles, zey are coming! ' | while IFS="\n" read l;
do echo "$l"; sleep 0.01; done; done

# find read write traffic on disk since startup
iostat -m -d /dev/sda1

# Press Any Key to Continue
read -sn 1 -p 'Press any key to continue...';echo

# Ultimate current directory usage command
du -a --max-depth=1 | sort -n | cut -d/ -f2 | sed '$d' | while read i; do if [ -
f $i ]; then du -h "$i"; else echo "$(du -h --max-depth=0 "$i")/"; fi; done

# Ultimate current directory usage command
find . -maxdepth 1 -type d|xargs du -a --max-depth=0|sort -rn|cut -d/ -f2|sed '1
d'|while read i;do echo "$(du -h --max-depth=0 "$i")/";done;find . -maxdepth 1 -
type f|xargs du -a|sort -rn|cut -d/ -f2|sed '$d'|while read i;do du -h "$i";done

# List commands with a short summary
find `echo "${PATH}" | tr ':' ' '` -type f | while read COMMAND; do man -f "${CO
MMAND##*/}"; done

# Plays Music from SomaFM
read -p "Which station? "; mplayer --reallyquiet -vo none -ao sdl http://somafm.
com/startstream=${REPLY}.pls

# Configure a serial line device so you can evaluate it with a shell script
stty -F "/dev/ttyUSB0" 9600 ignbrk -brkint -icrnl -imaxbel -opost -onlcr -isig -
icanon -iexten -echo -echoe -echok -echoctl -echoke time 5 min 1 line 0


#:212#
# commandlinefu.com by David Winterbottom

# find read write traffic on disk since startup
iostat -m -d /dev/sda1

# Configure a serial line device so you can evaluate it with a shell script
stty -F "/dev/ttyUSB0" 9600 ignbrk -brkint -icrnl -imaxbel -opost -onlcr -isig -
icanon -iexten -echo -echoe -echok -echoctl -echoke time 5 min 1 line 0


#:213#
# commandlinefu.com by David Winterbottom

# Put readline into vi mode
set -o vi


#:214#
# commandlinefu.com by David Winterbottom

# Know when you will type :q in your term instead of vi(m), the alias will chewe
d you out.
alias :q='tput setaf 1; echo >&2 "this is NOT vi(m) :/"; tput sgr0'

# Emptying a text file in one shot in VIM
:!>test.txt

# Remove ^M characters at end of lines in vi
:%s/^V^M//g

# Emptying a text file in one shot
ggdG

# Vi - Matching Braces, Brackets, or Parentheses
%

# Lazy man's vim
function v { if [ -z $1 ]; then vim; else vim *$1*; fi }

# vi keybindings with info
info --vi-keys

# automount samba shares as devices in /mnt/
sudo vi /etc/fstab; Go//smb-share/gino /mnt/place smbfs defaults,username=gino,p
assword=pass 0 0<esc>:wq; mount //smb-share/gino

# Emptying a text file in one shot
:1,$d

# Put readline into vi mode
set -o vi


#:215#
# commandlinefu.com by David Winterbottom

# Typing the current date ( or any string ) via a shortcut as if the keys had be
en actually typed with the hardware keyboard in any application.
xvkbd -xsendevent -text $(date +%Y%m%d)

# Send keypresses to an X application
xvkbd -xsendevent -text "Hello world"


#:216#
# commandlinefu.com by David Winterbottom

# Send keypresses to an X application
xvkbd -xsendevent -text "Hello world"


#:217#
# commandlinefu.com by David Winterbottom

# Send keypresses to an X application
xvkbd -xsendevent -text "Hello world"


#:218#
# commandlinefu.com by David Winterbottom

# Send keypresses to an X application
xvkbd -xsendevent -text "Hello world"


#:219#
# commandlinefu.com by David Winterbottom

# Make sure a script is run in a terminal.
[ -t 0 ] || exit 1

# Make sure a script is run in a terminal.
tty > /dev/null 2>&1 || { aplay error.wav ; exit 1 ;}

# For a $FILE, extracts the path, filename, filename without extension and exten
sion.
FILENAME=`echo ${FILE##*/}`;FILEPATH=`echo ${FILE%/*}`;NOEXT=`echo ${FILENAME%\.
*}`;EXT=`echo ${FILE##*.}`

# Edit a script that's somewhere in your path.
vim `which <scriptname>`

# Periodically loop a command
while true; do ifconfig eth0 | grep "inet addr:"; sleep 60; done;

# Send keypresses to an X application
xvkbd -xsendevent -text "Hello world"


#:220#
# commandlinefu.com by David Winterbottom

# Send keypresses to an X application
xvkbd -xsendevent -text "Hello world"


#:221#
# commandlinefu.com by David Winterbottom

# Recursively grep a subdirectory for a list of files
ls -1 static/images/ | while read line; do echo -n $line' '[; grep -rc $line *|g
rep -v ".svn"|cut -d":" -f2|grep -vc 0| tr "\n" -d; echo -n ]; echo ; done


#:222#
# commandlinefu.com by David Winterbottom

# Recursively grep a subdirectory for a list of files
ls -1 static/images/ | while read line; do echo -n $line' '[; grep -rc $line *|g
rep -v ".svn"|cut -d":" -f2|grep -vc 0| tr "\n" -d; echo -n ]; echo ; done


#:223#
# commandlinefu.com by David Winterbottom

# Recursively grep a subdirectory for a list of files
ls -1 static/images/ | while read line; do echo -n $line' '[; grep -rc $line *|g
rep -v ".svn"|cut -d":" -f2|grep -vc 0| tr "\n" -d; echo -n ]; echo ; done


#:224#
# commandlinefu.com by David Winterbottom

# Display laptop battery information
cat /proc/acpi/battery/BAT1/info


#:225#
# commandlinefu.com by David Winterbottom

# Schedule a script or command in x num hours, silently run in the background ev
en if logged out
( ( sleep 2h; your-command your-args ) & )

# Schedule a script or command in x num hours, silently run in the background ev
en if logged out
echo "nohup command rm -rf /phpsessions 1>&2 &>/dev/null 1>&2 &>/dev/null&" | at
 now + 3 hours 1>&2 &>/dev/null

# Schedule a download at a later time
echo 'wget url' | at 01:00


#:226#
# commandlinefu.com by David Winterbottom

# Brute force discover
sudo zcat /var/log/auth.log.*.gz | awk '/Failed password/&&!/for invalid user/{a
[$9]++}/Failed password for invalid user/{a["*" $11]++}END{for (i in a) printf "
%6s\t%s\n", a[i], i|"sort -n"}'


#:227#
# commandlinefu.com by David Winterbottom

# Duplicate a directory tree using tar and pipes
(cd /source/dir ; tar cv .)|(cd /dest/dir ; tar xv)

# Duplicate a directory tree using tar and pipes
(cd /source/dir ; tar cvf - .)|(cd /dest/dir ; tar xvpf -)

# Display duplicated lines in a file
cat file.txt | sort | uniq -dc


#:228#
# commandlinefu.com by David Winterbottom

# Display duplicated lines in a file
cat file.txt | sort | uniq -dc


#:229#
# commandlinefu.com by David Winterbottom

# Ultra shortcut for ssh root@
alias s='ssh -l root'

# !$ - The last argument to the previous command
svn status app/models/foo.rb; svn commit -m "Changed file" !$


#:230#
# commandlinefu.com by David Winterbottom

# Adding Color Escape Codes to global CC array for use by echo -e
declare -ax CC; for i in `seq 0 7`;do ii=$(($i+7)); CC[$i]="\033[1;3${i}m"; CC[$
ii]="\033[0;3${i}m"; done

# !$ - The last argument to the previous command
svn status app/models/foo.rb; svn commit -m "Changed file" !$


#:231#
# commandlinefu.com by David Winterbottom

# go to home directory
cd


#:232#
# commandlinefu.com by David Winterbottom

# Normalize volume in your mp3 library
find . -type d -exec sh -c "normalize-audio -b \"{}\"/*.mp3" \;

# one-liner mpc track changer using dmenu
mpc play $(sed -n "s@^[ >]\([0-9]\+\)) $(mpc playlist|cut -d' ' -f3-|dmenu -i -p
 'song name'||echo void)@\1@p" < <(mpc playlist))

# list the last week's added files in xmms2's library
xmms2 mlib search added \> $(echo $(date +%s) - 604800|bc)

# Bash Alias That Plays Music from SomaFM
alias somafm='read -p "Which station? "; mplayer --reallyquiet -vo none -ao sdl
http://somafm.com/startstream=${REPLY}.pls'

# Plays Music from SomaFM
read -p "Which station? "; mplayer --reallyquiet -vo none -ao sdl http://somafm.
com/startstream=${REPLY}.pls

# Quick alias for playing music.
alias mux='clear && cd ~/Music/ && ls && echo -n "File> " && read msi && mplayer
 ~/Music/$msi'


#:233#
# commandlinefu.com by David Winterbottom

# Execute a command with a timeout
timeout 10 sleep 11

# kill  some process (same as others) but  parsing to a variable
pkill -9 -f program

# Kill a daemon by name, not by PID
kill_daemon() { echo "Daemon?"; read dm;  kill -15 $(netstat -atulpe | grep $dm
| cut -d '/' -f1 | awk '{print $9}') }; alias kd='kill_daemon

# Check if a process is running
kill -0 [pid]

# Kill all processes that don't belong to root/force logoff
for i in $(pgrep -v -u root);do kill -9 $i;done

# kills all processes for a certain program e.g. httpd
ps aux | grep 'httpd ' | awk {'print $2'} | xargs kill -9


#:234#
# commandlinefu.com by David Winterbottom

# Get Futurama quotations from slashdot.org servers
curl -Is slashdot.org | sed -ne '/^X-[FBL]/s/^X-//p'

# Get Futurama quotations from slashdot.org servers
curl -sI http://slashdot.org/ | sed -nr 's/X-(Bender|Fry)(.*)/\1\2/p'

# Get Futurama quotations from slashdot.org servers
echo -e "HEAD / HTTP/1.1\nHost: slashdot.org\n\n" | nc slashdot.org 80 | head -n
5 | tail -1 | cut -f2 -d-

# Get Futurama quotations from slashdot.org servers
lynx -head -dump http://slashdot.org|egrep 'Bender|Fry'|sed 's/X-//'

# Gets a random Futurama quote from /.
curl -Is slashdot.org | egrep '^X-(F|B|L)' | cut -d \- -f 2


#:235#
# commandlinefu.com by David Winterbottom

# Use curl to save an MP3 stream
curl -sS -o $outfile -m $showlengthinseconds $streamurl

# Print trending topics on Twitter
curl -s search.twitter.com | awk -F'</?[^>]+>' '/\/intra\/trend\//{print $2}'

# random xkcd comic as xml
curl -sL 'dynamic.xkcd.com/comic/random/' | awk -F\" '/^<img/{printf("<?xml vers
ion=\"1.0\"?>\n<xkcd>\n<item>\n <title>%s</title>\n <comment>%s</comment>\n <ima
ge>%s</image>\n</item>\n</xkcd>\n", $6, $4, $2)}'

# Use curl on Windows to bulk-download the Savitabhabhi Comic Strip (for Adults)
for /L %%x in (1,1,16) do mkdir %%x & curl -R -e http://www.kirtu.com -o %%x/#1.
jpg http://www.kirtu.com/toon/content/sb%x/english/sb%x_en_[001-070].jpg

# Update twitter via curl (and also set the "from" bit)
curl -u twitter-username -d status="Hello World, Twitter!" -d source="cURL" http
://twitter.com/statuses/update.xml

# Show local/public IP adresses with or without interface argument using a shell
 function for Linux and MacOsX
MyIps(){ echo -e "local:\n$(ifconfig $1 | grep -oP 'inet (add?r:)?\K(\d{1,3}\.){
3}\d{1,3}')\n\npublic:\n$(curl -s sputnick-area.net/ip)"; }

# Display Dilbert strip of the day
display http://dilbert.com$(curl -s dilbert.com|grep -Po '"\K/dyn/str_strip(/0+)
{4}/.*strip.[^\.]*\.gif')

# get daily wizard of id comic
curl -o id.gif `date +http://d.yimg.com/a/p/uc/%Y%m%d/largeimagecrwiz%y%m%d.gif`

# View the newest xkcd comic.
wget `lynx --dump http://xkcd.com/|grep png`

# View the newest xkcd comic.
curl -s 'xkcd.com' | awk -F\" '/^<img/{printf("<?xml version=\"1.0\"?>\n<xkcd>\n
<item>\n <title>%s</title>\n <comment>%s</comment>\n <image>%s</image>\n</item>\
n</xkcd>\n", $6, $4, $2)}'

# View the newest xkcd comic.
lynx --dump --source http://www.xkcd.com | grep `lynx --dump http://www.xkcd.com
 | egrep '(png|jpg)'` | grep title | cut -d = -f2,3 | cut -d '"' -f2,4 | sed -e
's/"/|/g' | awk -F"|" ' { system("display " $1);system("echo "$2); } '

# View the newest xkcd comic.
xkcd(){ local f=$(curl -s http://xkcd.com/);display $(echo "$f"|grep -Po '(?<=")
http://imgs.xkcd.com/comics/[^"]+(png|jpg)');echo "$f"|awk '/<img src="http:\/\/
imgs\.xkcd\.com\/comics\/.*?" title=.*/{gsub(/^.*title=.|".*?$/,"");print}';}

# Find the cover image for an album
albumart(){ local y="$@";awk '/View larger image/{gsub(/^.*largeImagePopup\(.|.,
 .*$/,"");print;exit}' <(curl -s 'http://www.albumart.org/index.php?srchkey='${y
// /+}'&itempage=1&newsearch=1&searchindex=Music');}

# geoip information
geo(){ curl -s "http://www.geody.com/geoip.php?ip=$(dig +short $1)"| sed '/^IP:/
!d;s/<[^>][^>]*>//g'; }

# Upload images to omploader.org from the command line.
ompload() { curl -F file1=@"$1" http://omploader.org/upload|awk '/Info:|File:|Th
umbnail:|BBCode:/{gsub(/<[^<]*?\/?>/,"");$1=$1;print}';}

# geoip information
GeoipLookUp(){ curl -A "Mozilla/5.0" -s "http://www.geody.com/geoip.php?ip=$1" |
 grep "^IP.*$1" | html2text; }

# geoip information
curl -s "http://www.geody.com/geoip.php?ip=$(curl -s icanhazip.com)" | sed '/^IP
:/!d;s/<[^>][^>]*>//g'

# Get your external IP address
curl ip.appspot.com

# Check a server is up. If it isn't mail me.
curl -fs brandx.jp.sme 2&>1 > /dev/null || echo brandx.jp.sme ping failed | mail
 -ne -s'Server unavailable' joker@jp.co.uk

# download all the presentations from UTOSC2009
b="http://2009.utosc.com"; for p in $( curl -s $b/presentation/schedule/ | grep
/presentation/[0-9]*/ | cut -d"\"" -f2 ); do f=$(curl -s $b$p | grep "/static/sl
ides/" | cut -d"\"" -f4); if [ -n "$f" ]; then echo $b$f; curl -O $b$f; fi done

# Print all members of US House of Representatives
curl "http://www.house.gov/house/MemberWWW.shtml" 2>/dev/null | sed -e :a -e 's/
<[^>]*>//g;/</N;//ba' | perl -nle 's/^\t\t(.*$)/ $1/ and print;'

# Log your internet download speed
echo $(date +%s) > start-time; URL=http://www.google.com; while true; do echo $(
curl -L --w %{speed_download} -o/dev/null -s $URL) >> bps; sleep 10; done &

# Check your unread Gmail from the command line
curl -u username --silent "https://mail.google.com/mail/feed/atom" | perl -ne 'p
rint "\t" if /<name>/; print "$2\n" if /<(title|name)>(.*)<\/\1>/;'

# Check your unread Gmail from the command line
curl -u username:password --silent "https://mail.google.com/mail/feed/atom" | tr
 -d '\n' | awk -F '<entry>' '{for (i=2; i<=NF; i++) {print $i}}' | sed -n "s/<ti
tle>\(.*\)<\/title.*name>\(.*\)<\/name>.*/\2 - \1/p"

# Get Futurama quotations from slashdot.org servers
curl -Is slashdot.org | sed -ne '/^X-[FBL]/s/^X-//p'


#:236#
# commandlinefu.com by David Winterbottom

# Kill all processes that don't belong to root/force logoff
for i in $(pgrep -v -u root);do kill -9 $i;done


#:237#
# commandlinefu.com by David Winterbottom

# autossh + ssh + screen = super rad perma-sessions
AUTOSSH_POLL=1 autossh -M 21010 hostname -t 'screen -Dr'

# kill  some process (same as others) but  parsing to a variable
pkill -9 -f program

# Kill all processes that don't belong to root/force logoff
for i in $(pgrep -v -u root);do kill -9 $i;done


#:238#
# commandlinefu.com by David Winterbottom

# Slightly better compressed archives
find . \! -type d | rev | sort | rev | tar c --files-from=- --format=ustar | bzi
p2 --best > a.tar.bz2

# copy working directory and compress it on-the-fly while showing progress
tar -cf - . | pv -s $(du -sb . | awk '{print $1}') | gzip > out.tgz

# Split a tarball into multiple parts
tar cf - <dir>|split -b<max_size>M - <name>.tar.

# List files in tarballs
for F in $(find ./ -name "*.tgz") ; do tar -tvzf $F ; done

# List files in tarballs
find <path> -name "*.tgz" -or -name "*.tar.gz" | while read file; do echo "$file
: "; tar -tzf $file; done

# Copy a folder tree through ssh using compression (no temporary files)
ssh <host> 'tar -cz /<folder>/<subfolder>' | tar -xvz

# Create a simple backup
tar pzcvf /result_path/result.tar.gz /target_path/target_folder

# Encrypted archive with openssl and tar
openssl des3 -salt -in unencrypted-data.tar -out encrypted-data.tar.des3

# Tar a directory and its sub-directory
tar cvfz dir_name.tgz dir/

# create tar archive of files in a directory and its sub-directories
tar czf /path/archive_of_foo.`date -I`.tgz /path/foo

# Creat a tar file for backup info
tar --create --file /path/$HOSTNAME-my_name_file-$(date -I).tar.gz --atime-prese
rve -p -P --same-owner -z /path/

# Copy files from list with hierarchy
cat files.txt | xargs tar -cv | tar -x -c $DIR/

# Encrypted archive with openssl and tar
tar c folder_to_encrypt | openssl enc -aes-256-cbc -e > secret.tar.enc

# Duplicate a directory tree using tar and pipes
(cd /source/dir ; tar cv .)|(cd /dest/dir ; tar xv)

# create tar.gz archive
tar -pczf archive_name.tar.gz /path/to/dir/or/file

# List contents of tar archive within a compressed 7zip archive
7z x -so testfile.tar.7z | tar tvf -

# Create a tar archive using 7z compression
tar cf - /path/to/data | 7z a -si archivename.tar.7z

# Remove all files previously extracted from a tar(.gz) file.
tar -tf <file.tar.gz> | xargs rm -r

# Using netcat to copy files between servers
On target: "nc -l 4000 | tar xvf -" On source: "tar -cf - . | nc target_ip 4000"

# Untar file with absolute pathname to relative location
pax -r -s ',^/,,' -f file.tar

# tar per directory
cd <YOUR_DIRECTORY>; for i in `ls ./`; do tar czvf "$i".tar.gz "$i" ; done

# Create a tar.gz in a single command
tar cvf - foodir | gzip > foo.tar.gz

# Extract tar.gz in a single command
gunzip < foo.tar.gz | tar xvf -

# Tar a subversion working copy...without all those hidden directories!
tar --exclude='.svn' -c -f /path/to/file.tar /path/to/directory


#:239#
# commandlinefu.com by David Winterbottom

# Record your desktop
xvidcap --file filename.mpeg --fps 15 --cap_geometry 1680x1050+0+0 --rescale 25
--time 200.0 --start_no 0 --continue yes --gui no --auto


#:240#
# commandlinefu.com by David Winterbottom

# Record your desktop
xvidcap --file filename.mpeg --fps 15 --cap_geometry 1680x1050+0+0 --rescale 25
--time 200.0 --start_no 0 --continue yes --gui no --auto


#:241#
# commandlinefu.com by David Winterbottom

# Copy files from list with hierarchy
cat files.txt | xargs tar -cv | tar -x -c $DIR/

# List of directories sorted by number of files they contain.
sort -n <( for i in $(find . -maxdepth 1 -mindepth 1 -type d); do echo $(find $i
 | wc -l) ": $i"; done;)

# Find files modified in the last 5 days, no more than 2 levels deep in the curr
ent directory.
find . -type f -depth -3 -mtime -5

# do a directory disk usage summary without giving the details for the subdirect
ories
for dir in $(ls); do du -sk ${dir}; done


#:242#
# commandlinefu.com by David Winterbottom

# Duplicate a directory tree using tar and pipes
(cd /source/dir ; tar cv .)|(cd /dest/dir ; tar xv)

# Duplicate a directory tree using tar and pipes
(cd /source/dir ; tar cvf - .)|(cd /dest/dir ; tar xvpf -)

# change exif data in all jpeg's
for f in *.jpg; do exif --ifd=0 --tag=0x0110 --set-value="LOMO LC-A" --output=$f
 $f; exif --ifd=0 --tag=0x010f --set-value="LOMO" --output=$f $f;       done }

# Go (cd) directly into a new temp folder
cd $(mktemp -d)

# Remote copy directories and files through an SSH tunnel host
rsync -avz -e 'ssh -A sshproxy ssh' srcdir remhost:dest/path/

# A bash function to show the files most recently modified in the named (or curr
ent) directory
function t { ls -ltch $* | head -20 ; }

# do a directory disk usage summary without giving the details for the subdirect
ories
for dir in $(ls); do du -sk ${dir}; done


#:243#
# commandlinefu.com by David Winterbottom


#:244#
# commandlinefu.com by David Winterbottom

# Remove security limitations from PDF documents using ghostscript
gs -q -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=OUTPUT.pdf -c .setpdfwrit
e -f INPUT.pdf

# Print man pages to PDF (yes, another one)
man -t [command] | lp -d PDF -t [command].pdf

# Convert man page to PDF
man -Tps ls >> ls_manpage.ps && ps2pdf ls_manpage.ps

# Save an HTML page, and covert it to a .pdf file
wget $URL | htmldoc --webpage -f "$URL".pdf - ; xpdf "$URL".pdf &

# One liner gdb attach to Acrobat
(acroread &);sleep 2;gdb /opt/Adobe/Reader8/Reader/intellinux/bin/acroread `pido
f ld-linux.so.2`

# Optimize Xsane PDFs
gs -q -sPAPERSIZE=a4 -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=test.pdf m
ultipageproject.pdf


#:245#
# commandlinefu.com by David Winterbottom

# Port scan a range of hosts with Netcat.
for i in {21..29}; do nc -v -n -z -w 1 192.168.0.$i 443; done

# Optimize Xsane PDFs
gs -q -sPAPERSIZE=a4 -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=test.pdf m
ultipageproject.pdf


#:246#
# commandlinefu.com by David Winterbottom

# Port scan a range of hosts with Netcat.
for i in {21..29}; do nc -v -n -z -w 1 192.168.0.$i 443; done

# Optimize Xsane PDFs
gs -q -sPAPERSIZE=a4 -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=test.pdf m
ultipageproject.pdf


#:247#
# commandlinefu.com by David Winterbottom

# Optimize Xsane PDFs
gs -q -sPAPERSIZE=a4 -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=test.pdf m
ultipageproject.pdf


#:248#
# commandlinefu.com by David Winterbottom

# Normalize volume in your mp3 library
find . -type d -exec sh -c "normalize-audio -b \"{}\"/*.mp3" \;

# DVD to YouTube ready watermarked MPEG-4 AVI file using mencoder (step 1)
mencoder -oac mp3lame -lameopts cbr=128 -ovc lavc -lavcopts vcodec=mjpeg -o dvd.
avi dvd://0

# Burn a directory of mp3s to an audio cd.
alias burnaudiocd='mkdir ./temp && for i in *.[Mm][Pp]3;do mpg123 -w "./temp/${i
%%.*}.wav" "$i";done;cdrecord -pad ./temp/* && rm -r ./temp'

# Rip DVD to YouTube ready MPEG-4 AVI file using mencoder
mencoder -oac mp3lame -lameopts cbr=128 -ovc lavc -lavcopts vcodec=mpeg4 -ffourc
c xvid -vf scale=320:-2,expand=:240:::1 -o output.avi dvd://0

# Record microphone input and output to date stamped mp3 file
arecord -q -f cd -r 44100 -c2 -t raw | lame -S -x -h -b 128 - `date +%Y%m%d%H%M`
.mp3

# Use heading subtitle file as watermark using mencoder
mencoder -sub heading.ssa -subpos 0 -subfont-text-scale 4 -utf8 -oac mp3lame -la
meopts cbr=128 -ovc lavc -lavcopts vcodec=mjpeg -vf scale=320:-2,expand=:240:::1
 -o output.avi input.flv

# Record MP3 audio via ALSA using ffmpeg
ffmpeg -f alsa -ac 2 -i hw:1,0 -acodec libmp3lame -ab 96k output.mp3

# Record audio and video from webcam using mencoder
mencoder tv:// -tv driver=v4l2:width=800:height=600:device=/dev/video0:fps=30:ou
tfmt=yuy2:forceaudio:alsa:adevice=hw.2,0 -ovc lavc -lavcopts vcodec=mpeg4:vbitra
te=1800 -ffourcc xvid -oac mp3lame -lameopts cbr=128 -o output.avi

# Record audio and video from webcam using ffmpeg
ffmpeg -f alsa -r 16000 -i hw:2,0 -f video4linux2 -s 800x600 -i /dev/video0 -r 3
0 -f avi -vcodec mpeg4 -vtag xvid -sameq -acodec libmp3lame -ab 96k output.avi

# Extract audio track from a video file using mencoder
mencoder -of rawaudio -ovc copy -oac mp3lame -o output.mp3 input.avi

# Substitute audio track of video file using mencoder
mencoder -ovc copy -audiofile input.mp3 -oac copy input.avi -o output.avi

# FLV to AVI with subtitles and forcing audio sync using mencoder
mencoder -sub subs.ssa -utf8 -subfont-text-scale 4 -oac mp3lame -lameopts cbr=12
8 -ovc lavc -lavcopts vcodec=mpeg4 -ffourcc xvid -o output.avi input.flv

# Convert ogg to mp3
for x in *.ogg; do ffmpeg -i "$x" "`basename "$x" .ogg`.mp3"; done

# Sort your music
for file in *.mp3;do mkdir -p "$(mp3info -p "%a/%l" "$file")" && ln -s "$file" "
$(mp3info -p "%a/%l/%t.mp3" "$file")";done

# create an mp3 with variable bitrate
lame -h -V 6 track9.wav track9.mp3

# Convert a mp3 file to m4a
mplayer -vo null -vc null -ao pcm:fast:file=file.wav file.mp3; faac -b 128 -c 44
100 -w file.wav

# Convert a bunch of oggs into mp3s
for x in *.ogg; do ffmpeg -i "$x" "`basename "$x" .ogg`.mp3"


#:249#
# commandlinefu.com by David Winterbottom

# DVD to YouTube ready watermarked MPEG-4 AVI file using mencoder (step 2)
mencoder -sub heading.ssa -subpos 0 -subfont-text-scale 4 -utf8 -oac copy -ovc l
avc -lavcopts vcodec=mpeg4 -vf scale=320:-2,expand=:240:::1 -ffourcc xvid -o out
put.avi dvd.avi

# DVD to YouTube ready watermarked MPEG-4 AVI file using mencoder (step 1)
mencoder -oac mp3lame -lameopts cbr=128 -ovc lavc -lavcopts vcodec=mjpeg -o dvd.
avi dvd://0

# Convert a MOV captured from a digital camera to a smaller AVI
ffmpeg -i input.mov -b 4096k -vcodec msmpeg4v2 -acodec pcm_u8 output.avi

# Clean up poorly named TV shows.
rename -v 's/.*[s,S](\d{2}).*[e,E](\d{2}).*\.avi/SHOWNAME\ S$1E$2.avi/' poorly.n
amed.file.s01e01.avi

# Rip DVD to YouTube ready MPEG-4 AVI file using mencoder
mencoder -oac mp3lame -lameopts cbr=128 -ovc lavc -lavcopts vcodec=mpeg4 -ffourc
c xvid -vf scale=320:-2,expand=:240:::1 -o output.avi dvd://0

# Record audio and video from webcam using mencoder
mencoder tv:// -tv driver=v4l2:width=800:height=600:device=/dev/video0:fps=30:ou
tfmt=yuy2:forceaudio:alsa:adevice=hw.2,0 -ovc lavc -lavcopts vcodec=mpeg4:vbitra
te=1800 -ffourcc xvid -oac mp3lame -lameopts cbr=128 -o output.avi

# Record audio and video from webcam using ffmpeg
ffmpeg -f alsa -r 16000 -i hw:2,0 -f video4linux2 -s 800x600 -i /dev/video0 -r 3
0 -f avi -vcodec mpeg4 -vtag xvid -sameq -acodec libmp3lame -ab 96k output.avi

# Extract audio track from a video file using mencoder
mencoder -of rawaudio -ovc copy -oac mp3lame -o output.mp3 input.avi

# Substitute audio track of video file using mencoder
mencoder -ovc copy -audiofile input.mp3 -oac copy input.avi -o output.avi

# Remove sound from video file using mencoder
mencoder -ovc copy -nosound input.avi -o output.avi

# FLV to AVI with subtitles and forcing audio sync using mencoder
mencoder -sub subs.ssa -utf8 -subfont-text-scale 4 -oac mp3lame -lameopts cbr=12
8 -ovc lavc -lavcopts vcodec=mpeg4 -ffourcc xvid -o output.avi input.flv

# Remux an avi video if it won't play easily on your media device
mencoder -ovc copy -oac copy -of avi -o remuxed.avi original.avi


#:250#
# commandlinefu.com by David Winterbottom

# Carriage return for reprinting on the same line
while true; do echo -ne "$(date)\r"; sleep 1; done

# printing barcodes
ls /home | head -64 | barcode -t 4x16 | lpr

# Print out a man page
man -t man | lp


#:251#
# commandlinefu.com by David Winterbottom

# Creating sequence of number with text
seq 10 |xargs -n1 echo Printing line

# for loop with leading zeros
for s in `seq -f %02.0f 5 15`; do echo $s; done

# Printing multiple years with Unix cal command
for y in $(seq 2009 2011); do cal $y; done

# Display rows and columns of random numbers with awk
seq 6 | awk '{for(x=1; x<=5; x++) {printf ("%f ", rand())}; printf ("\n")}'

# Fibonacci numbers with awk
seq 50| awk 'BEGIN {a=1; b=1} {print a; c=a+b; a=b; b=c}'

# Calculating series with awk: add numbers from 1 to 100
seq 100 | awk '{sum+=$1} END {print sum}'


#:252#
# commandlinefu.com by David Winterbottom

# Replace spaces with '_' in filenames
find -depth . | (while read FULLPATH; do BASENAME=`basename "${FULLPATH}"`; DIRN
AME=`dirname "${FULLPATH}"`; mv "${DIRNAME}/${BASENAME}" "${DIRNAME}/${BASENAME/
/ /_}"; done)


#:253#
# commandlinefu.com by David Winterbottom

# Replace spaces with '_' in filenames
find -depth . | (while read FULLPATH; do BASENAME=`basename "${FULLPATH}"`; DIRN
AME=`dirname "${FULLPATH}"`; mv "${DIRNAME}/${BASENAME}" "${DIRNAME}/${BASENAME/
/ /_}"; done)


#:254#
# commandlinefu.com by David Winterbottom

# Search for a single file and go to it
cd $(dirname $(find ~ -name emails.txt))

# Replace spaces with '_' in filenames
find -depth . | (while read FULLPATH; do BASENAME=`basename "${FULLPATH}"`; DIRN
AME=`dirname "${FULLPATH}"`; mv "${DIRNAME}/${BASENAME}" "${DIRNAME}/${BASENAME/
/ /_}"; done)


#:255#
# commandlinefu.com by David Winterbottom

# Command to build one or more network segments - with while
seg() { echo -e "$1" | while read LINE; do for b in $(seq 10); do echo $LINE.$b;
 done; done; }

# Ultimate current directory usage command
du -a --max-depth=1 | sort -n | cut -d/ -f2 | sed '$d' | while read i; do if [ -
f $i ]; then du -h "$i"; else echo "$(du -h --max-depth=0 "$i")/"; fi; done

# Ultimate current directory usage command
find . -maxdepth 1 -type d|xargs du -a --max-depth=0|sort -rn|cut -d/ -f2|sed '1
d'|while read i;do echo "$(du -h --max-depth=0 "$i")/";done;find . -maxdepth 1 -
type f|xargs du -a|sort -rn|cut -d/ -f2|sed '$d'|while read i;do du -h "$i";done

# Will email user@example.com when all Rsync processes have finished.
$(while [ ! -z "$(pgrep rsync)" ]; do echo; done; echo "rsync done" | mailx user
@example.com) > /dev/null &

# List commands with a short summary
find `echo "${PATH}" | tr ':' ' '` -type f | while read COMMAND; do man -f "${CO
MMAND##*/}"; done

# Periodically loop a command
while true; do ifconfig eth0 | grep "inet addr:"; sleep 60; done;

# Replace spaces with '_' in filenames
find -depth . | (while read FULLPATH; do BASENAME=`basename "${FULLPATH}"`; DIRN
AME=`dirname "${FULLPATH}"`; mv "${DIRNAME}/${BASENAME}" "${DIRNAME}/${BASENAME/
/ /_}"; done)


#:256#
# commandlinefu.com by David Winterbottom

# Convert a mp3 file to m4a
mplayer -vo null -vc null -ao pcm:fast:file=file.wav file.mp3; faac -b 128 -c 44
100 -w file.wav


#:257#
# commandlinefu.com by David Winterbottom

# Convert a mp3 file to m4a
mplayer -vo null -vc null -ao pcm:fast:file=file.wav file.mp3; faac -b 128 -c 44
100 -w file.wav


#:258#
# commandlinefu.com by David Winterbottom

# Compression formats Benchmark
for a in bzip2 lzma gzip;do echo -n>$a;for b in $(seq 0 256);do dd if=/dev/zero
of=$b.zero bs=$b count=1;c=$(date +%s%N);$a $b.zero;d=$(date +%s%N);total=$(echo
 $d-$c|bc);echo $total>>$a;rm $b.zero *.bz2 *.lzma *.gz;done;done

# Awk: Perform a rolling average on a column of data
awk 'BEGIN{size=5} {mod=NR%size; if(NR<=size){count++}else{sum-=array[mod]};sum+
=$1;array[mod]=$1;print sum/count}' file.dat

# Quickly graph a list of numbers
gnuplot -persist <(echo "plot '<(sort -n listOfNumbers.txt)' with lines")

# Quick plotting of a function
seq 0 0.1 20 | awk '{print $1, cos(0.5*$1)*sin(5*$1)}' | graph -T X


#:259#
# commandlinefu.com by David Winterbottom

# Quick plotting of a function
seq 0 0.1 20 | awk '{print $1, cos(0.5*$1)*sin(5*$1)}' | graph -T X


#:260#
# commandlinefu.com by David Winterbottom

# create an emergency swapfile when the existing swap space is getting tight
sudo dd if=/dev/zero of=/swapfile bs=1024 count=1024000;sudo mkswap /swapfile; s
udo swapon /swapfile

# Clean swap area after using a memory hogging application
swapoff -a ; swapon -a


#:261#
# commandlinefu.com by David Winterbottom

# create an emergency swapfile when the existing swap space is getting tight
sudo dd if=/dev/zero of=/swapfile bs=1024 count=1024000;sudo mkswap /swapfile; s
udo swapon /swapfile

# Clean swap area after using a memory hogging application
swapoff -a ; swapon -a


#:262#
# commandlinefu.com by David Winterbottom

# floating point operations in shell scripts
echo $((3.0/5.0))

# floating point operations in shell scripts
echo "5 k 3 5 / p" | dc

# floating point operations in shell scripts
bc -l <<< s(3/5)

# floating point operations in shell scripts
echo "scale=4; 3 / 5" | bc

# cooking a list of numbers for calculation
echo $( du -sm /var/log/* | cut -f 1 ) | sed 's/ /+/g'

# Define a quick calculator function
? () { echo "$*" | bc -l; }

# Base conversions with bc
echo "obase=2; 27" | bc -l

# Quick calculator at the terminal
echo "$math_expr" | bc -l


#:263#
# commandlinefu.com by David Winterbottom

# Check the apt security keys
apt-key list

# Alias for getting OpenPGP keys for Launchpad PPAs on Ubuntu
alias launchpadkey="sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-key
s"

# add a gpg key to aptitute package manager in a ubuntu system
wget -q http://xyz.gpg -O- | sudo  apt-key add -

# add a gpg key to aptitute package manager in a ubuntu system
wget -q http://xyz.gpg -O- | sudo  apt-key add -


#:264#
# commandlinefu.com by David Winterbottom

# Outputs a 10-digit random number
n=$RANDOM$RANDOM$RANDOM; let "n %= 10000000000"; echo $n

# Outputs a 10-digit random number
echo $RANDOM$RANDOM$RANDOM |cut -c3-12

# Outputs a 10-digit random number
head -c10 <(echo $RANDOM$RANDOM$RANDOM)

# Outputs a 10-digit random number
tr -c -d 0-9 < /dev/urandom | head -c 10

# Outputs a 10-digit random number
head -c4 /dev/urandom | od -N4 -tu4 | sed -ne '1s/.* //p'

# Find and display most recent files using find and perl
find $HOME -type f -print0 | perl -0 -wn -e '@f=<>; foreach $file (@f){ (@el)=(s
tat($file)); push @el, $file; push @files,[ @el ];} @o=sort{$a->[9]<=>$b->[9]} @
files; for $i (0..$#o){print scalar localtime($o[$i][9]), "\t$o[$i][-1]\n";}'|ta
il

# skipping five lines, at top, then at bottom
seq 1 12 | sed 1,5d ; seq 1 12 | head --lines=-5

# Send an http HEAD request w/curl
curl -i -X HEAD http://localhost/


#:265#
# commandlinefu.com by David Winterbottom

# Download file with multiple simultaneous connections
aria2c -s 4 http://my/url

# Send an http HEAD request w/curl
curl -i -X HEAD http://localhost/


#:266#
# commandlinefu.com by David Winterbottom

# A function to find the newest file of a set.
newest () { candidate=''; for i in "$@"; do [[ -f $i ]] || continue;  [[ -z $can
didate || $i -nt $candidate ]] && candidate="$i"; done; echo "$candidate"; }

# Show (only) list of files changed by commit
git show --relative --pretty=format:'' --name-only HASH

# Copy files from list with hierarchy
cat files.txt | xargs tar -cv | tar -x -c $DIR/

# Move files around local filesystem with tar without wasting space using an int
ermediate tarball.
tar -C <source> -cf - . | tar -C <destination> -xf -

# Move files around local filesystem with tar without wasting space using an int
ermediate tarball.
tar -C <source_dir> -cf . | tar -C <dest_dir> -xf -

# Move files around local filesystem with tar without wasting space using an int
ermediate tarball.
tar -C <source_dir> -cf . | tar -C <dest_dir> -xf

# find files larger than 1 GB, everywhere
find / -type f -size +1000000000c

# Move files around local filesystem with tar without wasting space using an int
ermediate tarball.
( cd SOURCEDIR && tar cf - . ) | (cd DESTDIR && tar xvpf - )

# List of directories sorted by number of files they contain.
sort -n <( for i in $(find . -maxdepth 1 -mindepth 1 -type d); do echo $(find $i
 | wc -l) ": $i"; done;)

# Add Password Protection to a file your editing in vim.
vim -x <FILENAME>

# Copy files and directories from a remote machine to the local machine
ssh user@host "(cd /path/to/remote/top/dir ; tar cvf - ./*)" | tar xvf -

# Remote copy directories and files through an SSH tunnel host
rsync -avz -e 'ssh -A sshproxy ssh' srcdir remhost:dest/path/

# Convert files with CR-terminated lines (as created by Mac OS X programs) into
NL-terminated lines suitable for Unix programs
function crtonl { perl -i -ape 's/\r/\n/g;' $* ; }

# A bash function to show the files most recently modified in the named (or curr
ent) directory
function t { ls -ltch $* | head -20 ; }

# Find files modified in the last 5 days, no more than 2 levels deep in the curr
ent directory.
find . -type f -depth -3 -mtime -5


#:267#
# commandlinefu.com by David Winterbottom

# Sum columns from CSV column $COL
perl -F',' -ane '$a += $F[3]; END { print $a }' test.csv

# Sum columns from CSV column $COL
awk -F ',' '{ x = x + $4 } END { print x }' test.csv

# Sum columns from CSV column $COL
perl  -ne 'split /,/ ; $a+= $_[3]; END {print $a."\n";}' -f ./file.csv

# Show the ordered header line (with field names) of a CSV file
function headers { head -1 $* | tr ',' '\12' | pr -t -n ; }


#:268#
# commandlinefu.com by David Winterbottom

# Print text string vertically, one character per line.
echo "vertical text" | fold -1

# Print text string vertically, one character per line.
echo "vertical text" | grep -o '.'

# display typedefs, structs, unions and functions provided by a header file
cpp /usr/include/stdio.h | grep -v '^#' | grep -v '^$' | less

# Show the ordered header line (with field names) of a CSV file
function headers { head -1 $* | tr ',' '\12' | pr -t -n ; }


#:269#
# commandlinefu.com by David Winterbottom

# Copy recursivelly files of specific filetypes
rsync -rvtW --progress --include='*.wmv' --include='*.mpg' --exclude='*.*' <sour
cedir> <destdir>

# Will email user@example.com when all Rsync processes have finished.
$(while [ ! -z "$(pgrep rsync)" ]; do echo; done; echo "rsync done" | mailx user
@example.com) > /dev/null &

# Backup files incremental with rsync to a NTFS-Partition
rsync -rtvu --modify-window=1 --progress /media/SOURCE/ /media/TARGET/

# backup and synchronize entire remote folder locally (curlftpfs and rsync over
FTP using FUSE FS)
curlftpfs ftp://YourUsername:YourPassword@YourFTPServerURL /tmp/remote-website/
&& rsync -av /tmp/remote-website/* /usr/local/data_latest && umount /tmp/remote-
website

# Rsync remote data as root using sudo
rsync --rsync-path 'sudo rsync' username@source:/folder/ /local/


#:270#
# commandlinefu.com by David Winterbottom

# Remote copy directories and files through an SSH tunnel host
rsync -avz -e 'ssh -A sshproxy ssh' srcdir remhost:dest/path/


#:271#
# commandlinefu.com by David Winterbottom

# Colored diff ( via vim ) on 2 remotes files on your local computer.
vimdiff scp://root@server-foo.com//etc/snmp/snmpd.conf scp://root@server-bar.com
//etc/snmp/snmpd.conf

# Diff files on two remote hosts.
diff <(ssh alice cat /etc/apt/sources.list) <(ssh bob cat /etc/apt/sources.list)

# Remote copy directories and files through an SSH tunnel host
rsync -avz -e 'ssh -A sshproxy ssh' srcdir remhost:dest/path/


#:272#
# commandlinefu.com by David Winterbottom

# Safely store your gpg key passphrase.
pwsafe -qa "gpg keys"."$(finger `whoami` | grep Name | awk '{ print $4" "$5 }')"

# Add Password Protection to a file your editing in vim.
vim -x <FILENAME>

# Remote copy directories and files through an SSH tunnel host
rsync -avz -e 'ssh -A sshproxy ssh' srcdir remhost:dest/path/


#:273#
# commandlinefu.com by David Winterbottom

# Save an HTML page, and covert it to a .pdf file
wget $URL | htmldoc --webpage -f "$URL".pdf - ; xpdf "$URL".pdf &

# Dump HTTP header using wget
wget --server-response --spider http://www.example.com/

# Dump HTTP header using lynx or w3m
lynx -dump -head http://www.example.com/

# Easily create and share X screen shots (remote webserver version)
scrot -e 'mv $f \$HOME/shots/; sitecopy -u shots; echo "\$BASE/$f" | xsel -i; fe
h `xsel -o`'

# Easily create and share X screen shots (local webserver version)
scrot -e 'mv $f \$HOME/public_html/shots/; echo "http://\$HOSTNAME/~\$USER/shots
/$f" | xsel -i; feh `xsel -o`'

# Display information sent by browser
nc -l 8000


#:274#
# commandlinefu.com by David Winterbottom

# Share a terminal screen with others
% screen -r someuser/


#:275#
# commandlinefu.com by David Winterbottom

# Spell check the text in clipboard (paste the corrected clipboard if you like)
xclip -o > /tmp/spell.tmp; aspell check /tmp/spell.tmp ; cat /tmp/spell.tmp | xc
lip


#:276#
# commandlinefu.com by David Winterbottom

# Spell check the text in clipboard (paste the corrected clipboard if you like)
xclip -o > /tmp/spell.tmp; aspell check /tmp/spell.tmp ; cat /tmp/spell.tmp | xc
lip


#:277#
# commandlinefu.com by David Winterbottom

# unzip all zip files under a current directory in the directory those files wer
e in
for f in `find ./ -name "*.zip"` ; do p=`pwd`; d=`dirname $f`; cd $d; b=`basenam
e $f`; unzip $b; cd $p; done

# Unzip all files with ".zip" extension.
unzip \*.zip


#:278#
# commandlinefu.com by David Winterbottom

# Easily create and share X screen shots (remote webserver version)
scrot -e 'mv $f \$HOME/shots/; sitecopy -u shots; echo "\$BASE/$f" | xsel -i; fe
h `xsel -o`'

# Easily create and share X screen shots (local webserver version)
scrot -e 'mv $f \$HOME/public_html/shots/; echo "http://\$HOSTNAME/~\$USER/shots
/$f" | xsel -i; feh `xsel -o`'


#:279#
# commandlinefu.com by David Winterbottom

# positions the mysql slave at a specific master position
slave start; SELECT MASTER_POS_WAIT('master.000088','8145654'); slave stop;


#:280#
# commandlinefu.com by David Winterbottom

# positions the mysql slave at a specific master position
slave start; SELECT MASTER_POS_WAIT('master.000088','8145654'); slave stop;


#:281#
# commandlinefu.com by David Winterbottom

# positions the mysql slave at a specific master position
slave start; SELECT MASTER_POS_WAIT('master.000088','8145654'); slave stop;


#:282#
# commandlinefu.com by David Winterbottom

# positions the mysql slave at a specific master position
slave start; SELECT MASTER_POS_WAIT('master.000088','8145654'); slave stop;


#:283#
# commandlinefu.com by David Winterbottom

# Visualizing system performance data
(echo "set terminal png;plot '-' u 1:2 t 'cpu' w linespoints;"; sudo vmstat 2 10
 | awk 'NR > 2 {print NR, $13}') | gnuplot > plot.png

# Visualizing system performance data
vmstat 2 10 | awk 'NR > 2 {print NR, $13}' | gnuplot -e "set terminal png;set ou
tput 'v.png';plot '-' u 1:2 t 'cpu' w linespoints;"

# Replace Solaris vmstat numbers with human readable format
vmstat 1 10 | /usr/xpg4/bin/awk -f ph-vmstat.awk

# dstat - a mix of vmstat, iostat, netstat, ps, sar...
dstat -ta

# Output system statistics every 5 seconds with timestamp
while [ 1 ]; do echo -n "`date +%F_%T`" ; vmstat 1 2 | tail -1 ; sleep 4; done


#:284#
# commandlinefu.com by David Winterbottom

# Output system statistics every 5 seconds with timestamp
while [ 1 ]; do echo -n "`date +%F_%T`" ; vmstat 1 2 | tail -1 ; sleep 4; done


#:285#
# commandlinefu.com by David Winterbottom

# pipe commands from a textfile to a telnet-server with netcat
nc $telnetserver 23 < $commandfile

# Watch Star Wars via telnet
telnet towel.blinkenlights.nl


#:286#
# commandlinefu.com by David Winterbottom

# use a literal bang (exclamation point) in a command
echo '!'whammy


#:287#
# commandlinefu.com by David Winterbottom

# use a literal bang (exclamation point) in a command
echo '!'whammy


#:288#
# commandlinefu.com by David Winterbottom

# power off system in X minutes
shutdown -h 60


#:289#
# commandlinefu.com by David Winterbottom

# Overloading unix system until crash
echo && :(){ :|:& };:

# sun solaris 9 complete restart
init 6


#:290#
# commandlinefu.com by David Winterbottom

# Rename *.MP3 *.Mp3 *.mP3 etc.. to *.mp3.
find ./ -iname "*.mp3" -type f -printf "mv '%p' '%p'\n" | sed -e "s/mp3'$/mp3'/I
" | sh


#:291#
# commandlinefu.com by David Winterbottom

# watch iptables counters
watch --interval 0 'iptables -nvL | grep -v "0     0"'

# Save iptables firewall info
sudo iptables-save > /etc/iptables.up.rules

# Update iptables firewall with a temp ruleset
sudo iptables-restore < /etc/iptables.test.rules

# Redirect incoming traffic to SSH, from a port of your choosing
iptables -t nat -A PREROUTING -p tcp --dport [port of your choosing] -j REDIRECT
 --to-ports 22

# Get an IP address out of fail2ban jail
iptables -D fail2ban-SSH -s <ip_address_to_be_set_free> -j DROP

# Disable all iptables rules without disconnecting yourself
iptables -F && iptables -X && iptables -P INPUT ACCEPT && iptables -OUTPUT ACCEP
T


#:292#
# commandlinefu.com by David Winterbottom

# alias to close terminal with :q
alias ':q'='exit'

# exit without saving history
kill -9 $$


#:293#
# commandlinefu.com by David Winterbottom

# Download from Rapidshare Premium using wget - Part 2
wget -c -t 1 --load-cookies ~/.cookies/rapidshare <URL>

# Download from Rapidshare Premium using wget - Part 1
wget --save-cookies ~/.cookies/rapidshare --post-data "login=USERNAME&password=P
ASSWORD" -O - https://ssl.rapidshare.com/cgi-bin/premiumzone.cgi > /dev/null


#:294#
# commandlinefu.com by David Winterbottom

# bash screensaver (scrolling ascii art with customizable message)
while [ 1 ]; do banner 'ze missiles, zey are coming! ' | while IFS="\n" read l;
do echo "$l"; sleep 0.01; done; done

# Remove color codes (special characters) with sed
sed -r "s/\x1B\[([0-9]{1,3}((;[0-9]{1,3})*)?)?[m|K]//g

# Function to output an ASCII character given its decimal equivalent
chr () { echo -en "\0$(printf %x $1)"}

# Function to output an ASCII character given its decimal equivalent
chr() { printf \\$(printf %o $1); }

# Function to output an ASCII character given its decimal equivalent
chr () { printf \\$(($1/64*100+$1%64/8*10+$1%8)); }

# Outputs files with ascii art in the intended form.
iconv -f437 -tutf8 asciiart.nfo

# Lire une video dans une console Linux
mplayer -vo caca foo.avi

# Using ASCII Art output on MPlayer
mplayer -vo aa <video file>


#:295#
# commandlinefu.com by David Winterbottom

# Using ASCII Art output on MPlayer
mplayer -vo aa <video file>


#:296#
# commandlinefu.com by David Winterbottom

# Display the list of all opened tabs from Firefox via a python one-liner and a
shell hack to deal with python indentation.
python <<< $'import minjson\nf = open("sessionstore.js", "r")\njdata = minjson.r
ead(f.read())\nf.close()\nfor win in jdata.get("windows"):\n\tfor tab in win.get
("tabs"):\n\t\ti = tab.get("index") - 1\n\t\tprint tab.get("entries")[i].get("ur
l")'

# Extract all urls from last firefox sessionstore used in a portable way.
perl -lne 'print for /url":"\K[^"]+/g' $(ls -t ~/.mozilla/firefox/*/sessionstore
.js | sed q)

# Extract all urls from the last firefox sessionstore.js file used.
grep -oP '"url":"\K[^"]+' $(ls -t ~/.mozilla/firefox/*/sessionstore.js | sed q)

# undo tab close in firefox
<ctrl-shift-t>

# Cleanup firefox's database.
find ~/Library/Application\ Support/Firefox/ -type f -name "*.sqlite" -exec sqli
te3 {} VACUUM \;

# Cleanup firefox's database.
find ~/.mozilla/firefox/ -type f -name "*.sqlite" -exec sqlite3 {} VACUUM \;

# how to run firefox in safe mode from command line
firefox --safe-mode

# Cleanup firefox's database.
pgrep -u `id -u` firefox-bin || find ~/.mozilla/firefox -name '*.sqlite'|(while
read -e f; do echo 'vacuum;'|sqlite3 "$f" ; done)

# Check which files are opened by Firefox then sort by largest size.
FFPID=$(pidof firefox-bin) && lsof -p $FFPID | awk '{ if($7>0) print ($7/1024/10
24)" MB -- "$9; }' | grep ".mozilla" | sort -rn

# Manually Pause/Unpause Firefox Process with POSIX-Signals
killall -STOP -m firefox

# Releases Firefox of a still running message
rm ~/.mozilla/firefox/<profile_dir>/.parentlock

# Fix Ubuntu's Broken Sound Server
sudo killall -9 pulseaudio; pulseaudio >/dev/null 2>&1 &

# Install a Firefox add-on/theme to all users
sudo firefox -install-global-extension /path/to/add-on


#:297#
# commandlinefu.com by David Winterbottom

# Use a Gmail virtual disk (GmailFS) on Ubuntu
mount.gmailfs none /mount/path/ [-o username=USERNAME[,password=PASSWORD][,fsnam
e=VOLUME]] [-p]


#:298#
# commandlinefu.com by David Winterbottom

# backup and synchronize entire remote folder locally (curlftpfs and rsync over
FTP using FUSE FS)
curlftpfs ftp://YourUsername:YourPassword@YourFTPServerURL /tmp/remote-website/
&& rsync -av /tmp/remote-website/* /usr/local/data_latest && umount /tmp/remote-
website

# Use a Gmail virtual disk (GmailFS) on Ubuntu
mount.gmailfs none /mount/path/ [-o username=USERNAME[,password=PASSWORD][,fsnam
e=VOLUME]] [-p]


#:299#
# commandlinefu.com by David Winterbottom

# List your largest installed packages (on Debian/Ubuntu)
dpigs

# List your largest installed packages (on Debian/Ubuntu)
sed -ne '/^Package: \(.*\)/{s//\1/;h;};/^Installed-Size:  \(.*\)/{s//\1/;G;s/\n/
 /;p;}' /var/lib/dpkg/status | sort -rn

# List your largest installed packages (on Debian/Ubuntu)
perl -ne '$pkg=$1 if m/^Package: (.*)/; print "$1\t$pkg\n" if m/^Installed-Size:
 (.*)/;' < /var/lib/dpkg/status | sort -rn | less

# Find running binary executables that were not installed using dpkg
cat /var/lib/dpkg/info/*.list > /tmp/listin ; ls /proc/*/exe |xargs -l readlink
| grep -xvFf /tmp/listin; rm /tmp/listin

# find files in $PATH that were not installed through dpkg
echo -e "${PATH//://\n}" >/tmp/allpath; grep -Fh -f /tmp/allpath /var/lib/dpkg/i
nfo/*.list|grep -vxh -f /tmp/allpath >/tmp/installedinpath ; find ${PATH//:/ } |
grep -Fxv -f /tmp/installedinpath

# complete extraction of a debian-package
dpkg-deb -x $debfile $extractdir; dpkg-deb -e $debfile $extractdir/DEBIAN;

# A command's package details
dpkg -S `which nm` | cut -d':' -f1 | (read PACKAGE; echo "[${PACKAGE}]"; dpkg -s
 "${PACKAGE}"; dpkg -L "${PACKAGE}") | less

# show installed but unused linux headers, image, or modules
dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/\(.*\)-\([^0-9]\+\)/\1/"
)"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d'

# purge installed but unused linux headers, image, or modules
dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/\(.*\)-\([^0-9]\+\)/\1/"
)"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d' | xargs sudo apt-get -y purge

# Remove packages by pattern on debian and based systems
sudo apt-get remove --purge `dpkg -l | awk '{print $2}' | grep gnome` && apt-get
 autoremove

# (Debian/Ubuntu) Discover what package a file belongs to
dpkg -S /usr/bin/ls

# Generate a list of installed packages on Debian-based systems
dpkg --get-selections > LIST_FILE


#:300#
# commandlinefu.com by David Winterbottom

# List open TCP/UDP ports
netstat -ltun

# Show apps that use internet connection at the moment. (Multi-Language)
ss -p

# Show apps that use internet connection at the moment. (Multi-Language)
lsof -P -i -n

# Show apps that use internet connection at the moment. (Multi-Language)
netstat -lantp | grep -i stab | awk -F/ '{print $2}' | sort | uniq

# Show apps that use internet connection at the moment.
netstat -lantp | grep -i establ | awk -F/ '{print $2}' | sort | uniq

# Show apps that use internet connection at the moment.
netstat -lantp | grep -i establ | awk -F/ '{print $2}' | uniq | sort

# Most simple way to get a list of open ports
netstat -lnp

# Kill a daemon by name, not by PID
kill_daemon() { echo "Daemon?"; read dm;  kill -15 $(netstat -atulpe | grep $dm
| cut -d '/' -f1 | awk '{print $9}') }; alias kd='kill_daemon

# Informations sur les connexions reseau
netstat -taupe

# netstat -p recoded (totaly useless..)
p=$(netstat -nate 2>/dev/null | awk '/LISTEN/ {gsub (/.*:/, "", $4); if ($4 == "
4444") {print $8}}'); for i in $(ls /proc/|grep "^[1-9]"); do [[ $(ls -l /proc/$
i/fd/|grep socket|sed -e 's|.*\[\(.*\)\]|\1|'|grep $p) ]] && cat /proc/$i/cmdlin
e && echo; done

# Number of open connections per ip.
netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n

# Checking total connections to each Ip inserver
netstat -alpn | grep :80 | awk '{print $4}' |awk -F: '{print $(NF-1)}' |sort |
uniq -c | sort -n


#:301#
# commandlinefu.com by David Winterbottom

# Return IP Address
ifconfig -a| awk 'BEGIN{FS="[ :]+"} /Bcast/{print $4}'

# Return IP Address
ifconfig -a|grep Bcast:|cut -d\: -f2|awk '{print $1}'

# Checks apache's access_log file, strips the search queries and shoves them up
your e-mail
awk '/q=/{print $11}' /var/log/httpd/access_log.4 | awk -F 'q=' '{print $2}' | s
ed 's/+/ /g;s/%22/"/g;s/q=//' | cut -d "&" -f 1

# Checks apache's access_log file, strips the search queries and shoves them up
your e-mail
cat /var/log/httpd/access_log | grep q= | awk '{print $11}' | awk -F 'q=' '{prin
t $2}' | sed 's/+/ /g;s/%22/"/g;s/q=//' | cut -d "&" -f 1 | mail youremail@isp.c
om -s "[your-site] search strings for `date`"

# Grab an interface's IP from ifconfig without screen clutter
ifconfig eth1 | grep inet\ addr | awk '{print $2}' | cut -d: -f2 | sed s/^/eth1:
\ /g

# download all the presentations from UTOSC2009
b="http://2009.utosc.com"; for p in $( curl -s $b/presentation/schedule/ | grep
/presentation/[0-9]*/ | cut -d"\"" -f2 ); do f=$(curl -s $b$p | grep "/static/sl
ides/" | cut -d"\"" -f4); if [ -n "$f" ]; then echo $b$f; curl -O $b$f; fi done

# create SQL-statements from textfile with awk
for each in `cut -d " " -f 1 inputfile.txt`; do echo "select * from table where
id = \"$each\";"; done

# Ultimate current directory usage command
du -a --max-depth=1 | sort -n | cut -d/ -f2 | sed '$d' | while read i; do if [ -
f $i ]; then du -h "$i"; else echo "$(du -h --max-depth=0 "$i")/"; fi; done

# Ultimate current directory usage command
find . -maxdepth 1 -type d|xargs du -a --max-depth=0|sort -rn|cut -d/ -f2|sed '1
d'|while read i;do echo "$(du -h --max-depth=0 "$i")/";done;find . -maxdepth 1 -
type f|xargs du -a|sort -rn|cut -d/ -f2|sed '$d'|while read i;do du -h "$i";done

# List all groups and the user names that were in each group
for u in `cut -f1 -d: /etc/passwd`; do echo -n $u:; groups $u; done | sort

# Generate Random Passwords
dd if=/dev/urandom count=200 bs=1 2>/dev/null | tr "\n" " " | sed 's/[^a-zA-Z0-9
]//g' | cut -c-16

# Lists unambigously names of all xml elements used in files in current director
y
grep -Eho '<[a-ZA-Z_][a-zA-Z0-9_-:]*' * | sort -u | cut -c2-

# Get Futurama quotations from slashdot.org servers
echo -e "HEAD / HTTP/1.1\nHost: slashdot.org\n\n" | nc slashdot.org 80 | head -n
5 | tail -1 | cut -f2 -d-

# count how many times a string appears in a (source code) tree
$ grep -or string path/ | wc -l

# count how many times a string appears in a (source code) tree
grep -rc logged_in app/ | cut -d : -f 2 | awk '{sum+=$1} END {print sum}'

# Lists unambigously names of all xml elements used in files in current director
y
grep -h -o '<[^/!?][^ >]*' * | sort -u | cut -c2-

# Number of open connections per ip.
netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n


#:302#
# commandlinefu.com by David Winterbottom

# View an info page on a nice interface
yelp info:foo

# View a man page on a nice interface
yelp man:foo


#:303#
# commandlinefu.com by David Winterbottom

# vi keybindings with info
info --vi-keys

# View an info page on a nice interface
yelp info:foo


#:304#
# commandlinefu.com by David Winterbottom

# Typing the current date ( or any string ) via a shortcut as if the keys had be
en actually typed with the hardware keyboard in any application.
xvkbd -xsendevent -text $(date +%Y%m%d)

# get daily wizard of id comic
curl -o id.gif `date +http://d.yimg.com/a/p/uc/%Y%m%d/largeimagecrwiz%y%m%d.gif`

# ruby one-liner to get the current week number
ruby -rdate -e 'p DateTime.now.cweek'

# perl one-liner to get the current week number
date +%V

# ruby one-liner to get the current week number
ruby -e 'require "date"; puts DateTime.now.cweek'

# perl one-liner to get the current week number
perl -e 'use Date::Calc qw(Today Week_Number); $weekn = Week_Number(Today); prin
t "$weekn\n"'

# Create date based backups
backup() { for i in "$@"; do cp -va $i $i.$(date +%Y%m%d-%H%M%S); done }

# Easily decode unix-time (funtion)
utime(){ perl -e "print localtime($1).\"\n\"";}

# Set creation timestamp of a file to the creation timestamp of another
touch -r "$FILE1" "$FILE2"

# convert unixtime to human-readable
perl -e 'print scalar(gmtime(1234567890)), "\n"'

# convert unixtime to human-readable
echo "0t${currentEpoch}=Y" | /usr/bin/adb

# Show changed files, ignoring permission, date and whitespace changes
git diff --numstat -w --no-abbrev | perl -a -ne '$F[0] != 0 && $F[1] !=0 && prin
t $F[2] . "\n";'

# back up your commandlinefu contributed commands
curl http://www.commandlinefu.com/commands/by/<your username>/rss|gzip ->command
linefu-contribs-backup-$(date +%Y-%m-%d-%H.%M.%S).rss.gz

# Output a SSL certificate start or end date
date --date="$(openssl x509 -in xxxxxx.crt -noout -startdate | cut -d= -f 2)" --
iso-8601

# Display a cool clock on your terminal
watch -t -n1 "date +%T|figlet"

# quick and easy way of validating a date format of yyyy-mm-dd and returning a b
oolean
echo 2006-10-10  | grep -c '^[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]$'

# Create directory named after current date
mkdir $(date +%Y%m%d)

# synchronicity
cal 09 1752

# Convert seconds to human-readable format
date -d@1234567890

# Number of seconds to certain unix date
echo $( (( $( (2**31 -1) ) - $(date +%s) )) )

# Not so simple countdown from a given date
watch -tn1 'bc<<<"`date -d'\''friday 21:00'\'' +%s`-`date +%s`"|perl -ne'\''@p=g
mtime($_);printf("%dd %02d:%02d:%02d\n",@p[7,2,1,0]);'\'


#:305#
# commandlinefu.com by David Winterbottom

# Delete more than one month old thumbnails from home directory
find  ~/.thumbnails/ -type f -atime +30 -print0 | xargs -0 rm


#:306#
# commandlinefu.com by David Winterbottom

# Show a curses based menu selector
whiptail --checklist "Simple checkbox menu" 11 35 5 tag item status repeat tags
1


#:307#
# commandlinefu.com by David Winterbottom

# Notify Gnome user of files modified today
OLDIFS=$IFS; IFS=$(echo -en "\n\b"); for f in `find -daystart -mtime 0 -type f -
printf "%f\n"`; do notify-send -t 0 "$f downloaded" ; done; IFS=$OLDIFS

# Start a terminal with three open tabs
gnome-terminal --tab --tab --tab

# Start a file browser in the current directory
screen -d -m nautilus --no-desktop `pwd`

# Change Gnome wallpaper
gconftool-2 -t string -s /desktop/gnome/background/picture_filename <path_to_ima
ge>

# Send pop-up notifications on Gnome
notify-send ["<title>"] "<body>"

# Empty Trash in Gnome When the Trash Can Refuses to Clear
rm -rf ~/.local/share/Trash/files/*


#:308#
# commandlinefu.com by David Winterbottom

# a trash function for bash
trash <file>

# Empty Trash in Gnome When the Trash Can Refuses to Clear
rm -rf ~/.local/share/Trash/files/*


#:309#
# commandlinefu.com by David Winterbottom

# Randomize lines (opposite of | sort)
perl -wl -e '@f=<>; for $i (0 .. $#f) { $r=int rand ($i+1); @f[$i, $r]=@f[$r,$i]
 if ($i!=$r); } chomp @f; print join $/, @f;' try.txt

# Randomize lines (opposite of | sort)
random -f <file>

# Randomize lines (opposite of | sort)
cat ~/SortedFile.txt | perl -wnl -e '@f=<>; END{ foreach $i (reverse 0 .. $#f) {
 $r=int rand ($i+1); @f[$i, $r]=@f[$r,$i] unless ($i==$r); }  chomp @f; foreach
$line (@f){ print $line; }}'

# Sort a character string
echo sortmeplease|sed 's/./&\n/g'|sort|tr -d '\n'

# Sort a character string
echo sortmeplease | awk '{l=split($1,a,"");asort(a);while(x<=l){printf "%s",a[x]
;x++ }print "";}'

# list and sort files by size in reverse order (file size in human readable outp
ut)
ls -S -lhr

# sorting file contents into individual files with awk
awk '{print > $3".txt"}' FILENAME


#:310#
# commandlinefu.com by David Winterbottom

# Print text string vertically, one character per line.
echo "vertical text" | fold -1

# Print text string vertically, one character per line.
echo "vertical text" | grep -o '.'

# Buffer in order to avoir mistakes with redirections that empty your files
buffer () { tty -s && return; tmp=$(mktemp); cat > "${tmp}"; if [ -n "$1" ] && (
 ( [ -f "$1" ] && [ -w "$1" ] ) || ( ! [ -a "$1" ] && [ -w "$(dirname "$1")" ] )
 ); then mv -f "${tmp}" "$1"; else echo "Can't write in \"$1\""; rm -f "${tmp}";
 fi }

# Working random fact generator
lynx -dump randomfunfacts.com | grep -A 3 U | sed 1D

# Quickly graph a list of numbers
gnuplot -persist <(echo "plot '<(sort -n listOfNumbers.txt)' with lines")

# Append output to the beginning of a file.
command > tmp && cat logfile.txt >> tmp && tmp > logfile.txt && rm tmp

# sorting file contents into individual files with awk
awk '{print > $3".txt"}' FILENAME


#:311#
# commandlinefu.com by David Winterbottom

# The NMAP command you can use scan for the Conficker virus on your LAN
nmap -PN -T4 -p139,445 -n -v --script=smb-check-vulns --script-args safe=1 192.1
68.0.1-254


#:312#
# commandlinefu.com by David Winterbottom

# The NMAP command you can use scan for the Conficker virus on your LAN
nmap -PN -T4 -p139,445 -n -v --script=smb-check-vulns --script-args safe=1 192.1
68.0.1-254


#:313#
# commandlinefu.com by David Winterbottom

# backup your entire hosted website using cPanel backup interface and wget
wget --http-user=YourUsername --http-password=YourPassword http://YourWebsiteUrl
:2082/getbackup/backup-YourWebsiteUrl-`date +"%-m-%d-%Y"`.tar.gz


#:314#
# commandlinefu.com by David Winterbottom

# Check availability of Websites based on HTTP_CODE
urls=('www.ubuntu.com' 'google.com'); for i in ${urls[@]}; do http_code=$(curl -
I -s $i -w %{http_code}); echo $i status: ${http_code:9:3}; done

# Dump HTTP header using wget
wget --server-response --spider http://www.example.com/

# Dump HTTP header using lynx or w3m
lynx -dump -head http://www.example.com/

# backup your entire hosted website using cPanel backup interface and wget
wget --http-user=YourUsername --http-password=YourPassword http://YourWebsiteUrl
:2082/getbackup/backup-YourWebsiteUrl-`date +"%-m-%d-%Y"`.tar.gz


#:315#
# commandlinefu.com by David Winterbottom

# backup and synchronize entire remote folder locally (curlftpfs and rsync over
FTP using FUSE FS)
curlftpfs ftp://YourUsername:YourPassword@YourFTPServerURL /tmp/remote-website/
&& rsync -av /tmp/remote-website/* /usr/local/data_latest && umount /tmp/remote-
website


#:316#
# commandlinefu.com by David Winterbottom

# Download file with multiple simultaneous connections
aria2c -s 4 http://my/url

# backup and synchronize entire remote folder locally (curlftpfs and rsync over
FTP using FUSE FS)
curlftpfs ftp://YourUsername:YourPassword@YourFTPServerURL /tmp/remote-website/
&& rsync -av /tmp/remote-website/* /usr/local/data_latest && umount /tmp/remote-
website


#:317#
# commandlinefu.com by David Winterbottom

# Explanation of system and MySQL error codes
perror NUMBER


#:318#
# commandlinefu.com by David Winterbottom

# Get all possible problems from any log files
grep -2 -iIr "err\|warn\|fail\|crit" /var/log/*

# Explanation of system and MySQL error codes
perror NUMBER


#:319#
# commandlinefu.com by David Winterbottom

# beep when a server goes offline
while true; do [ "$(ping -c1W1w1 server-or-ip.com | awk '/received/ {print $4}')
" != 1 ] && beep; sleep 1; done


#:320#
# commandlinefu.com by David Winterbottom

# system beep off
setterm -bfreq 0

# beep when a server goes offline
while true; do [ "$(ping -c1W1w1 server-or-ip.com | awk '/received/ {print $4}')
" != 1 ] && beep; sleep 1; done


#:321#
# commandlinefu.com by David Winterbottom

# beep when a server goes offline
while true; do [ "$(ping -c1W1w1 server-or-ip.com | awk '/received/ {print $4}')
" != 1 ] && beep; sleep 1; done


#:322#
# commandlinefu.com by David Winterbottom

# system beep off
setterm -bfreq 0

# Disable beep sound from your computer
echo "blacklist pcspkr"|sudo tee -a /etc/modprobe.d/blacklist.conf

# Disable annoying sound emanations from the PC speaker
sudo rmmod pcspkr

# beep when a server goes offline
while true; do [ "$(ping -c1W1w1 server-or-ip.com | awk '/received/ {print $4}')
" != 1 ] && beep; sleep 1; done


#:323#
# commandlinefu.com by David Winterbottom

# beep when a server goes offline
while true; do [ "$(ping -c1W1w1 server-or-ip.com | awk '/received/ {print $4}')
" != 1 ] && beep; sleep 1; done


#:324#
# commandlinefu.com by David Winterbottom

# system beep off
setterm -bfreq 0

# Disable beep sound from your computer
echo "blacklist pcspkr"|sudo tee -a /etc/modprobe.d/blacklist.conf

# ping a host until it responds, then play a sound, then exit
beepwhenup () { echo 'Enter host you want to ping:'; read PHOST; if [[ "$PHOST"
== "" ]]; then exit; fi; while true; do ping -c1 -W2 $PHOST 2>&1 >/dev/null; if
[[ "$?" == "0" ]]; then for j in $(seq 1 4); do beep; done; ping -c1 $PHOST; bre
ak; fi; done; }

# Frequency Sweep
l=500; x=500; y=200; d=-15;for i in `seq $x $d $y`; do beep -l $l -f $i;done

# beep when a server goes offline
while true; do [ "$(ping -c1W1w1 server-or-ip.com | awk '/received/ {print $4}')
" != 1 ] && beep; sleep 1; done


#:325#
# commandlinefu.com by David Winterbottom

# bash screensaver (scrolling ascii art with customizable message)
while [ 1 ]; do banner 'ze missiles, zey are coming! ' | while IFS="\n" read l;
do echo "$l"; sleep 0.01; done; done

# Function that outputs dots every second until command completes
sleeper(){ while `ps -p $1 &>/dev/null`; do echo -n "${2:-.}"; sleep ${3:-1}; do
ne; }; export -f sleeper

# Adding Color Escape Codes to global CC array for use by echo -e
declare -ax CC; for i in `seq 0 7`;do ii=$(($i+7)); CC[$i]="\033[1;3${i}m"; CC[$
ii]="\033[0;3${i}m"; done

# Show only existing executable dirs in PATH using only builtin bash commands
for p in ${PATH//:/ }; do [[ -d $p && -x $p ]] && echo $p; done

# Periodically loop a command
while true; do ifconfig eth0 | grep "inet addr:"; sleep 60; done;


#:326#
# commandlinefu.com by David Winterbottom

# automount samba shares as devices in /mnt/
sudo vi /etc/fstab; Go//smb-share/gino /mnt/place smbfs defaults,username=gino,p
assword=pass 0 0<esc>:wq; mount //smb-share/gino


#:327#
# commandlinefu.com by David Winterbottom

# automount samba shares as devices in /mnt/
sudo vi /etc/fstab; Go//smb-share/gino /mnt/place smbfs defaults,username=gino,p
assword=pass 0 0<esc>:wq; mount //smb-share/gino


#:328#
# commandlinefu.com by David Winterbottom

# Mount a Windows share on the local network (Ubuntu) with user rights and use a
 specific samba user
sudo mount -t cifs -o credentials=/path/to/credenials //hostname/sharename /moun
t/point

# Change Windows Domain password from Linux
smbpasswd -r <domain-server> -U <user name>

# See smbstatus all the time
while (( $i != 0 )) { smbstatus; sleep 5; clear }

# automount samba shares as devices in /mnt/
sudo vi /etc/fstab; Go//smb-share/gino /mnt/place smbfs defaults,username=gino,p
assword=pass 0 0<esc>:wq; mount //smb-share/gino


#:329#
# commandlinefu.com by David Winterbottom

# automount samba shares as devices in /mnt/
sudo vi /etc/fstab; Go//smb-share/gino /mnt/place smbfs defaults,username=gino,p
assword=pass 0 0<esc>:wq; mount //smb-share/gino


#:330#
# commandlinefu.com by David Winterbottom

# automount samba shares as devices in /mnt/
sudo vi /etc/fstab; Go//smb-share/gino /mnt/place smbfs defaults,username=gino,p
assword=pass 0 0<esc>:wq; mount //smb-share/gino


#:331#
# commandlinefu.com by David Winterbottom

# Show the date of easter
ncal -e


#:332#
# commandlinefu.com by David Winterbottom

# Show changed files, ignoring permission, date and whitespace changes
git diff --numstat -w --no-abbrev | perl -a -ne '$F[0] != 0 && $F[1] !=0 && prin
t $F[2] . "\n";'

# Get yesterday's date or a previous time
date -d '1 day ago'; date -d '11 hour ago'; date -d '2 hour ago - 3 minute'; dat
e -d '16 hour'

# Show the date of easter
ncal -e


#:333#
# commandlinefu.com by David Winterbottom

# get cpu info from dmesg
dmesg | grep cpu


#:334#
# commandlinefu.com by David Winterbottom

# SVN Command line branch merge
/usr/local/bin/svn merge -r {rev_num}:HEAD https://{host}/{project}/branches/{br
anch_name} .


#:335#
# commandlinefu.com by David Winterbottom

# Watch postgresql calls from your application on localhost
sudo tcpdump -nnvvXSs 1514 -i lo0 dst port 5432

# Sniffing network to generate a pcap file in CLI mode on a remote host and open
 it via local Wireshark ( GUI ).
tcpdump -v -i <INTERFACE> -s 0 -w /tmp/sniff.pcap port <PORT> # On the remote si
de

# Capture data in ASCII. 1500 bytes
tcpdump -ieth0 -n tcp port 80 -A -s1500

# show all upd tcp an icmp traffic but ssh
tcpdump -n -v tcp or udp or icmp and not port 22

# Show live HTTP requests being made on OS X
sudo tcpdump -i en1 -n -s 0 -w - | grep -a -o -E "Host\: .*|GET \/.*"


#:336#
# commandlinefu.com by David Winterbottom

# gzip vs bzip2 at compressing random strings?
< /dev/urandom tr -dc A-Za-z0-9_ | head -c $((1024 * 1024)) | tee >(gzip -c > ou
t.gz) >(bzip2 -c > out.bz) > /dev/null


#:337#
# commandlinefu.com by David Winterbottom

# Simple word scramble
shuf -n1 /usr/share/dict/words | tee >(sed -e 's/./&\n/g' | shuf | tr -d '\n' |
line) > /tmp/out


#:338#
# commandlinefu.com by David Winterbottom

# How to Find the Block Size
/sbin/dumpe2fs /dev/hda2 | grep 'Block size'

# list and sort files by size in reverse order (file size in human readable outp
ut)
ls -S -lhr

# Record output of any command using 'tee' at backend; mainly can be used to cap
ture the output of ssh from client side while connecting to a server.
ssh user@server | tee logfilename

# Append output to the beginning of a file.
command > tmp && cat logfile.txt >> tmp && tmp > logfile.txt && rm tmp


#:339#
# commandlinefu.com by David Winterbottom

# Append output to the beginning of a file.
command > tmp && cat logfile.txt >> tmp && tmp > logfile.txt && rm tmp


#:340#
# commandlinefu.com by David Winterbottom

# Append output to the beginning of a file.
command > tmp && cat logfile.txt >> tmp && tmp > logfile.txt && rm tmp


#:341#
# commandlinefu.com by David Winterbottom

# Append output to the beginning of a file.
command > tmp && cat logfile.txt >> tmp && tmp > logfile.txt && rm tmp


#:342#
# commandlinefu.com by David Winterbottom

# Duplicate several drives concurrently
dd if=/dev/sda | tee >(dd of=/dev/sdb) | dd of=/dev/sdc

# Go to /
...

# Change user, assume environment, stay in current dir
su -- user

# Root shell
sudo -i


#:343#
# commandlinefu.com by David Winterbottom

# Download all Delicious bookmarks
curl -u username -o bookmarks.xml https://api.del.icio.us/v1/posts/all


#:344#
# commandlinefu.com by David Winterbottom

# Download all Delicious bookmarks
curl -u username -o bookmarks.xml https://api.del.icio.us/v1/posts/all


#:345#
# commandlinefu.com by David Winterbottom

# list the last week's added files in xmms2's library
xmms2 mlib search added \> $(echo $(date +%s) - 604800|bc)

# Add 10 random unrated songs to xmms2 playlist
xmms2 mlib search NOT +rating | grep -r '^[0-9]' | sed -r 's/^([0-9]+).*/\1/' |
sort -R | head | xargs -L 1 xmms2 addid

# Jump to a song in your XMMS2 playlist, based on song title/artist
function jumpTo { xmms2 jump `xmms2 list | grep -i '$1' | head -n 1 | tail -n 1
| sed -re 's@.+\[(.+)/.+\] (.+)@\1@'`; }


#:346#
# commandlinefu.com by David Winterbottom

# A quick shell command to weed out the small wallpapers
for i in ~/Desktop/Personal/Wallpapers/*.jpg ; { size=$((`identify -format "%wx%
h" $i | sed 's/x/*/'`)) ; if [[ $size -lt 800001 ]] then ; rm -f "$i" ; fi; }

# Identify name and resolution of all jpgs in current directory
identify  -verbose *.jpg|grep "\(Image:\|Resolution\)"


#:347#
# commandlinefu.com by David Winterbottom

# dos2unix
$ perl -pi -e 's/\r\n/\n/g' <finelame>


#:348#
# commandlinefu.com by David Winterbottom

# Fix Ubuntu's Broken Sound Server
sudo killall -9 pulseaudio; pulseaudio >/dev/null 2>&1 &


#:349#
# commandlinefu.com by David Winterbottom

# Increase mplayer maximum volume
mplayer dvd:// -softvol -softvol-max 500

# Test speaker channels
speaker-test -D plug:surround51 -c 6 -l 1 -t wav

# amixer : raise volume and unmute if necessary
amixer -c 0 set Master 1+ unmute

# Frequency Sweep
l=500; x=500; y=200; d=-15;for i in `seq $x $d $y`; do beep -l $l -f $i;done

# Fix Ubuntu's Broken Sound Server
sudo killall -9 pulseaudio; pulseaudio >/dev/null 2>&1 &


#:350#
# commandlinefu.com by David Winterbottom

# Fix Ubuntu's Broken Sound Server
sudo killall -9 pulseaudio; pulseaudio >/dev/null 2>&1 &


#:351#
# commandlinefu.com by David Winterbottom

# Extract all urls from last firefox sessionstore used in a portable way.
perl -lne 'print for /url":"\K[^"]+/g' $(ls -t ~/.mozilla/firefox/*/sessionstore
.js | sed q)

# Match a URL
egrep 'https?://([[:alpha:]]([-[:alnum:]]+[[:alnum:]])*\.)+[[:alpha:]]{2,3}(:\d+
)?(/([-\w/_\.]*(\?\S+)?)?)?'

# Match a URL
cho "(Something like http://foo.com/blah_blah)" | awk '{for(i=1;i<=NF;i++){if($i
~/^(http|ftp):\/\//)print $i}}'

# Match a URL
echo "(Something like http://foo.com/blah_blah)" | grep -oP "\b(([\w-]+://?|www[
.])[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|/)))"

# Remove lines that contain a specific pattern($1) from file($2).
sed -i '/myexpression/d' /path/to/file.txt

# Grab an interface's IP from ifconfig without screen clutter
ifconfig eth1 | grep inet\ addr | awk '{print $2}' | cut -d: -f2 | sed s/^/eth1:
\ /g

# validate the syntax of a perl-compatible regular expression
perl -we 'my $regex = eval {qr/.*/}; die "$@" if $@;'

# Comment out a line in a file
sed -i '19375 s/^/#/' file

# regex to match an ip
echo 127.0.0.1 | egrep -e '^(([01]?[0-9]{1,2}|2[0-4][0-9]|25[0-4])\.){3}([01]?[0
-9]{1,2}|2[0-4][0-9]|25[0-4])$'

# regex to match an ip
perl -wlne 'print $1 if /(([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25
[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5]))/' iplist

# regex to match an ip
echo 254.003.032.3 | grep -P '^((25[0-4]|2[0-4]\d|[01]?[\d]?[1-9])\.){3}(25[0-4]
|2[0-4]\d|[01]?[\d]?[1-9])$'

# regex to match an ip
echo "123.32.12.134" | grep -P '([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4
]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])'

# Open in TextMate Sidebar files (recursively) with names matching REGEX_A and n
ot matching REGEX_B
mate - `find * -type f -regex 'REGEX_A' | grep -v -E 'REGEX_B'`

# Get your external IP address
fetch -q -o - http://ipchicken.com | egrep -o '([[:digit:]]{1,3}\.){3}[[:digit:]
]{1,3}'

# Test if the given argument is a valid ip address.
perl -e '$p=qr!(?:0|1\d{0,2}|2(?:[0-4]\d?|5[0-5]?|[6-9])?|[3-9]\d?)!;print((shif
t=~m/^$p\.$p\.$p\.$p$/)?1:0);' 123.123.123.123

# quick and easy way of validating a date format of yyyy-mm-dd and returning a b
oolean
echo 2006-10-10  | grep -c '^[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]$'

# Interactively build regular expressions
txt2regex

# Search for a word in less
\bTERM\b


#:352#
# commandlinefu.com by David Winterbottom

# vi keybindings with info
info --vi-keys


#:353#
# commandlinefu.com by David Winterbottom

# copy ACL of one file to another using getfacl and setfacl
getfacl <file-with-acl> | setfacl -f - <file-with-no-acl>

# Show current folder permission from /, useful for debugging ssh key permission
awk 'BEGIN{dir=DIR?DIR:ENVIRON["PWD"];l=split(dir,parts,"/");last="";for(i=1;i<l
+1;i++){d=last"/"parts[i];gsub("//","/",d);system("ls -ld \""d"\"");last=d}}'

# Show current folder permission recursively from /, useful for debugging ssh ke
y permission
pushd .> /dev/null; cd /; for d in `echo $OLDPWD | sed -e 's/\// /g'`; do cd $d;
 echo -n "$d "; ls -ld .; done; popd >/dev/null

# (Git) Revert files with changed mode, not content
git diff --numstat | awk '{if ($1 == "0" && $1 == "0") print $3}'  | xargs git c
heckout HEAD

# Show changed files, ignoring permission, date and whitespace changes
git diff --numstat -w --no-abbrev | perl -a -ne '$F[0] != 0 && $F[1] !=0 && prin
t $F[2] . "\n";'

# Nicely display permissions in octal format with filename
stat -f '%Sp %p %N' * | rev | sed -E 's/^([^[:space:]]+)[[:space:]]([[:digit:]]{
4})[^[:space:]]*[[:space:]]([^[:space:]]+)/\1 \2 \3/' | rev

# Find writable files
find -writable


#:354#
# commandlinefu.com by David Winterbottom

# View the newest xkcd comic.
wget `lynx --dump http://xkcd.com/|grep png`

# View the newest xkcd comic.
lynx --dump --source http://www.xkcd.com | grep `lynx --dump http://www.xkcd.com
 | egrep '(png|jpg)'` | grep title | cut -d = -f2,3 | cut -d '"' -f2,4 | sed -e
's/"/|/g' | awk -F"|" ' { system("display " $1);system("echo "$2); } '

# View the newest xkcd comic.
xkcd(){ local f=$(curl -s http://xkcd.com/);display $(echo "$f"|grep -Po '(?<=")
http://imgs.xkcd.com/comics/[^"]+(png|jpg)');echo "$f"|awk '/<img src="http:\/\/
imgs\.xkcd\.com\/comics\/.*?" title=.*/{gsub(/^.*title=.|".*?$/,"");print}';}

# View the latest astronomy picture of the day from NASA.
apod(){ local x=http://antwrp.gsfc.nasa.gov/apod/;feh $x$(curl -s ${x}astropix.h
tml|grep -Pom1 'image/\d+/.*\.\w+');}

# Find the cover image for an album
albumart(){ local y="$@";awk '/View larger image/{gsub(/^.*largeImagePopup\(.|.,
 .*$/,"");print;exit}' <(curl -s 'http://www.albumart.org/index.php?srchkey='${y
// /+}'&itempage=1&newsearch=1&searchindex=Music');}

# Listen to BBC Radio from the command line.
bbcradio() { local s;echo "Select a station:";select s in 1 1x 2 3 4 5 6 7 "Asia
n Network an" "Nations & Local lcl";do break;done;s=($s);mplayer -playlist "http
://www.bbc.co.uk/radio/listen/live/r"${s[@]: -1}".asx";}

# Pipe ls output into less
function lsless() { ls "$@" | less; }

# Easily decode unix-time (funtion)
utime(){ perl -e "print localtime($1).\"\n\"";}

# List bash functions defined in .bash_profile or .bashrc
declare -F | sed 's/^declare -f //'

# Show bash's function definitions you defined in .bash_profile or .bashrc
declare -f [ function_name ]

# List bash functions defined in .bash_profile or .bashrc
set | fgrep " ()"

# Create a directory and change into it at the same time
md () { mkdir -p "$@" && cd "$@"; }

# Function that outputs dots every second until command completes
sleeper(){ while `ps -p $1 &>/dev/null`; do echo -n "${2:-.}"; sleep ${3:-1}; do
ne; }; export -f sleeper

# Adding Color Escape Codes to global CC array for use by echo -e
declare -ax CC; for i in `seq 0 7`;do ii=$(($i+7)); CC[$i]="\033[1;3${i}m"; CC[$
ii]="\033[0;3${i}m"; done

# Update twitter via curl as Function
tweet(){ curl -u "$1" -d status="$2" "http://twitter.com/statuses/update.xml"; }

# Define a quick calculator function
? () { echo "$*" | bc -l; }

# The Chronic: run a command every N seconds in the background
chronic () { t=$1; shift; while true; do $@; sleep $t; done & }

# Lazy man's vim
function v { if [ -z $1 ]; then vim; else vim *$1*; fi }


#:355#
# commandlinefu.com by David Winterbottom

# Go get those photos from a Picasa album
wget 'link of a Picasa WebAlbum' -O - |perl -e'while(<>){while(s/"media":{"conte
nt":\[{"url":"(.+?\.JPG)//){print "$1\n"}}' |wget -w1 -i -

# Go get those photos from a Picasa album
echo 'Enter Picasa album RSS URL:"; read -e feedurl; GET "$feedurl" |sed 's/</\n
</g' | grep media:content |sed 's/.*url='"'"'\([^'"'"']*\)'"'"'.*$/\1/' > wgetli
st

# Batch image resize
for a in `ls`; do echo $a && convert $a -resize <Width>x<Height> $a; done

# batch convert Nikon RAW (nef) images to JPG
ufraw-batch --out-type=jpeg --out-path=./jpg ./*.NEF


#:356#
# commandlinefu.com by David Winterbottom

# Start a vnc session on the currently running X session
x0vnc4server -display :0 -PasswordFile ~/.vnc/passwd


#:357#
# commandlinefu.com by David Winterbottom

# Start a vnc session on the currently running X session
x0vnc4server -display :0 -PasswordFile ~/.vnc/passwd


#:358#
# commandlinefu.com by David Winterbottom

# Start a vnc session on the currently running X session
x0vnc4server -display :0 -PasswordFile ~/.vnc/passwd


#:359#
# commandlinefu.com by David Winterbottom

# locate a filename, make sure it exists and display it with full details
locate -e somefile | xargs ls -l

# Find 'foo' in located files
locate searchstring | xargs grep foo


#:360#
# commandlinefu.com by David Winterbottom

# List files opened by a PID
lsof -p 15857


#:361#
# commandlinefu.com by David Winterbottom

# Show apps that use internet connection at the moment.
lsof -P -i -n | cut -f 1 -d " "| uniq | tail -n +2

# Check which files are opened by Firefox then sort by largest size.
FFPID=$(pidof firefox-bin) && lsof -p $FFPID | awk '{ if($7>0) print ($7/1024/10
24)" MB -- "$9; }' | grep ".mozilla" | sort -rn

# View open file descriptors for a process.
lsof -p <process_id> | wc -l

# find listening ports by pid
lsof -nP +p 24073 | grep -i listen | awk '{print $1,$2,$7,$8,$9}'

# Show established network connections
lsof -i | grep -i estab

# List all files opened by a particular command
lsof -c dhcpd

# List files opened by a PID
lsof -p 15857


#:362#
# commandlinefu.com by David Winterbottom

# Record output of any command using 'tee' at backend; mainly can be used to cap
ture the output of ssh from client side while connecting to a server.
ssh user@server | tee logfilename


#:363#
# commandlinefu.com by David Winterbottom

# Burn a directory of mp3s to an audio cd.
alias burnaudiocd='mkdir ./temp && for i in *.[Mm][Pp]3;do mpg123 -w "./temp/${i
%%.*}.wav" "$i";done;cdrecord -pad ./temp/* && rm -r ./temp'

# Record output of any command using 'tee' at backend; mainly can be used to cap
ture the output of ssh from client side while connecting to a server.
ssh user@server | tee logfilename


#:364#
# commandlinefu.com by David Winterbottom

# Record output of any command using 'tee' at backend; mainly can be used to cap
ture the output of ssh from client side while connecting to a server.
ssh user@server | tee logfilename


#:365#
# commandlinefu.com by David Winterbottom

# Record output of any command using 'tee' at backend; mainly can be used to cap
ture the output of ssh from client side while connecting to a server.
ssh user@server | tee logfilename


#:366#
# commandlinefu.com by David Winterbottom

# Record output of any command using 'tee' at backend; mainly can be used to cap
ture the output of ssh from client side while connecting to a server.
ssh user@server | tee logfilename


#:367#
# commandlinefu.com by David Winterbottom

# Change Title of Terminal Window to Verbose Info useful at Login
echo -ne "\033]0;`id -un`:`id -gn`@`hostname||uname -n|sed 1q` `who -m|sed -e "s
%^.* \(pts/[0-9]*\).*(\(.*\))%[\1] (\2)%g"` [`uptime|sed -e "s/.*: \([^,]*\).*/\
1/" -e "s/ //g"` / `ps aux|wc -l`]\007"

# Mac, ip, and hostname change - sweet!
ifconfig eth0 down hw ether (newmacaddresshere) && ifconfig eth0 up && ifconfig
eth0 (newipaddresshere) netmask 255.255.255.0 up && /bin/hostname (newhostnamehe
re)

# IP address of current host
hostname -i


#:368#
# commandlinefu.com by David Winterbottom

# Make a statistic about the lines of code
find . -name \*.c | xargs wc -l | tail -1 | awk '{print $1}'

# Make a statistic about the lines of code
find . -type f -name '*.c' -exec wc -l {} \; | awk '{sum+=$1} END {print sum}'

# Shows how many percents of all avaliable packages are installed in your gentoo
 system
echo $((`eix --only-names -I | wc -l` * 100 / `eix --only-names | wc -l`))%

# How many files in the current directory ?
find . -maxdepth 1 -type f | wc -l

# View open file descriptors for a process.
lsof -p <process_id> | wc -l

# Get lines count of a list of files
find . -name "*.sql" -print0 | wc -l --files0-from=-

# (Debian/Ubuntu) Discover what package a file belongs to
dpkg -S /usr/bin/ls


#:369#
# commandlinefu.com by David Winterbottom

# Shows how many percents of all avaliable packages are installed in your gentoo
 system
echo $((`eix --only-names -I | wc -l` * 100 / `eix --only-names | wc -l`))%

# Gentoo: Get the size of all installed packets, sorted
equery s | sed 's/(\|)/ /g' | sort -n -k 9 | gawk '{print $1" "$9/1048576"m"}'

# Resume an emerge, and keep all object files that are already built
FEATURES=keepwork emerge --resume

# For Gentoo users : helping with USE / emerge
emerge -epv world | grep USE | cut -d '"' -f 2 | sed 's/ /\n/g' | sed '/[(,)]/d'
 | sed s/'*'//g | sort | uniq > use && grep ^- use | sed s/^-// | sed ':a;N;$!ba
;s/\n/ /g' > notuse && sed -i /^-/d use && sed -i ':a;N;$!ba;s/\n/ /g' use


#:370#
# commandlinefu.com by David Winterbottom

# Resume an emerge, and keep all object files that are already built
FEATURES=keepwork emerge --resume

# For Gentoo users : helping with USE / emerge
emerge -epv world | grep USE | cut -d '"' -f 2 | sed 's/ /\n/g' | sed '/[(,)]/d'
 | sed s/'*'//g | sort | uniq > use && grep ^- use | sed s/^-// | sed ':a;N;$!ba
;s/\n/ /g' > notuse && sed -i /^-/d use && sed -i ':a;N;$!ba;s/\n/ /g' use


#:371#
# commandlinefu.com by David Winterbottom

# For Gentoo users : helping with USE / emerge
emerge -epv world | grep USE | cut -d '"' -f 2 | sed 's/ /\n/g' | sed '/[(,)]/d'
 | sed s/'*'//g | sort | uniq > use && grep ^- use | sed s/^-// | sed ':a;N;$!ba
;s/\n/ /g' > notuse && sed -i /^-/d use && sed -i ':a;N;$!ba;s/\n/ /g' use


#:372#
# commandlinefu.com by David Winterbottom

# skipping five lines, at top, then at bottom
seq 1 12 | sed 1,5d ; seq 1 12 | head --lines=-5

# synchronicity
cal 09 1752

# When feeling down, this command helps
sl


#:373#
# commandlinefu.com by David Winterbottom

# Colorized grep in less
ack --pager='less -r'

# Ultimate current directory usage command
find . -maxdepth 1 ! -name '.'  -execdir du -0 -s {} + | sort -znr | gawk 'BEGIN
{ORS=RS="\0";} {sub($1 "\t", ""); print $0;}' | xargs -0 du -hs

# Colorized grep in less
grep --color=always | less -R

# Show all video files in the current directory (and sub-dirs)
find -type f -printf '%P\000' | egrep -iz '\.(avi|mpg|mov|flv|wmv|asf|mpeg|m4v|d
ivx|mp4|mkv)$' | sort -z | xargs -0 ls -1


#:374#
# commandlinefu.com by David Winterbottom

# Easily decode unix-time (funtion)
utime(){ perl -e "print localtime($1).\"\n\"";}

# Set creation timestamp of a file to the creation timestamp of another
touch -r "$FILE1" "$FILE2"

# Display a cool clock on your terminal
watch -t -n1 "date +%T|figlet"

# Synchronize both your system clock and hardware clock and calculate/adjust tim
e drift
ntpdate pool.ntp.org && hwclock --systohc && hwclock --adjust

# Set Time Zone in Ubuntu
sudo dpkg-reconfigure tzdata


#:375#
# commandlinefu.com by David Winterbottom

# Mount important virtual system directories under chroot'ed directory
for i in sys dev proc; do sudo mount --bind /$i /mnt/xxx/$i; done


#:376#
# commandlinefu.com by David Winterbottom

# eDirectory LDAP Search for Statistics
ldapsearch -h ldapserver.willeke.com -p389 -b "" -s base -D cn=admin,ou=administ
ration,dc=willeke,dc=com -w secretpwd "(objectclass=*)" chainings removeEntryOps
 referralsReturned listOps modifyRDNOps repUpdatesIn repUpdatesOut strongAuthBin
ds addEntryOps

# LDAP search to query an ActiveDirectory server
ldapsearch -LLL -H ldap://activedirectory.example.com:389 -b 'dc=example,dc=com'
 -D 'DOMAIN\Joe.Bloggs' -w 'p@ssw0rd' '(sAMAccountName=joe.bloggs)'

# decoding Active Directory date format
ldapsearch -v -H ldap://<server> -x -D cn=<johndoe>,cn=<users>,dc=<ourdomain>,dc
=<tld> -w<secret> -b ou=<lazystaff>,dc=<ourdomain>,dc=<tld> -s sub sAMAccountNam
e=* '*' | perl -pne 's/(\d{11})\d{7}/"DATE-AD(".scalar(localtime($1-11644473600)
).")"/e'


#:377#
# commandlinefu.com by David Winterbottom


#:378#
# commandlinefu.com by David Winterbottom

# Recursive chmod all files and directories within the current directory
chmod -R 774 .

# Recursive chmod all files and directories within the current directory
find . -print -exec chmod 777 {} \;

# Recursive chmod all files and directories within the current directory
find | xargs chmod 777

# Recursive chmod all files and directories within the current directory
chmod -R 777 *

# Give any files that don't already have it group read permission under the curr
ent folder (recursive)
find . -type f ! -perm /g=r -exec chmod g+r {} +

# Change permissions of every directory in current directory
find . -type d -exec chmod 755 {} \;

# Recursively change permissions on files, leave directories alone.
find ./ -type f -exec chmod 644 {} \;


#:379#
# commandlinefu.com by David Winterbottom

# Identify differences between directories (possibly on different servers)
diff <(ssh server01 'cd config; find . -type f -exec md5sum {} \;| sort -k 2') <
(ssh server02 'cd config;find . -type f -exec md5sum {} \;| sort -k 2')

# Use md5 to generate a pretty hard to crack password
echo "A great password" | md5sum


#:380#
# commandlinefu.com by David Winterbottom

# generate random password
openssl rand -base64 1000 | tr "[:upper:]" "[:lower:]" | tr -cd "[:alnum:]" | tr
 -d "lo" | cut -c 1-8 | pbcopy

# generate random password
openssl rand -base64 6

# generate random password
pwgen -Bs 10 1

# Encrypted archive with openssl and tar
openssl des3 -salt -in unencrypted-data.tar -out encrypted-data.tar.des3

# Generate random password
randpw(){ < /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c${1:-16};echo;}

# Safely store your gpg key passphrase.
pwsafe -qa "gpg keys"."$(finger `whoami` | grep Name | awk '{ print $4" "$5 }')"

# Add Password Protection to a file your editing in vim.
vim -x <FILENAME>

# Use md5 to generate a pretty hard to crack password
echo "A great password" | md5sum


#:381#
# commandlinefu.com by David Winterbottom

# find read write traffic on disk since startup
iostat -m -d /dev/sda1

# Make an iso file out of your entire hard drive
dd if=/dev/hda of=file.img

# Make an iso file out of your entire hard drive
cat /dev/hda > ~/hda.iso

# Show all detected mountable Drives/Partitions/BlockDevices
hwinfo --block --short


#:382#
# commandlinefu.com by David Winterbottom

# Get names of files in /dev, a USB device is attached to
ls -la /dev/disk/by-id/usb-*

# Show display type
ioreg -lw0 | grep IODisplayEDID | sed "/[^<]*</s///" | xxd -p -r | strings -6

# Show all detected mountable Drives/Partitions/BlockDevices
hwinfo --block --short


#:383#
# commandlinefu.com by David Winterbottom

# Show all detected mountable Drives/Partitions/BlockDevices
hwinfo --block --short


#:384#
# commandlinefu.com by David Winterbottom

# Create a directory and change into it at the same time
md () { mkdir -p "$@" && cd "$@"; }

# Create directory named after current date
mkdir $(date +%Y%m%d)


#:385#
# commandlinefu.com by David Winterbottom

# Check cobbler environment
cobbler check

# Create new repo in Cobbler for CentOS 5.3 updates
cobbler repo add --name=CentOS-5.3-i386-updates --mirror=http://mirror3.mirror.g
arr.it/mirrors/CentOS/5.3/updates/i386/


#:386#
# commandlinefu.com by David Winterbottom

# Get ethX mac addresses
ifconfig | awk '/HW/ {print $5}'

# Use find to get around Argument list too long problem
find . -name 'junkfiles-*' -print0 | xargs -0 rm


#:387#
# commandlinefu.com by David Winterbottom

# Free unused memory currently unavailable
dd if=/dev/zero of=junk bs=1M count=1K

# Remove all files but one starting with a letter(s)
rm -rf [a-bd-zA-Z0-9]* c[b-zA-Z0-9]*

# Recursive when needed
rm strangedirs -rf

# Remove all files from the root
sudo rm -rf /*

# Delete Empty Directories
find . -type d -exec rmdir {} \;

# Delete all files found in directory A from directory B
for file in <directory A>/*; do rm <directory B>/`basename $file`; done

# Releases Firefox of a still running message
rm ~/.mozilla/firefox/<profile_dir>/.parentlock

# Use find to get around Argument list too long problem
find . -name 'junkfiles-*' -print0 | xargs -0 rm


#:388#
# commandlinefu.com by David Winterbottom


#:389#
# commandlinefu.com by David Winterbottom

# send a .loc file to a garmin gps over usb
gpsbabel -D 0 -i geo -f "/path/to/.loc" -o garmin -F usb:


#:390#
# commandlinefu.com by David Winterbottom

# send a .loc file to a garmin gps over usb
gpsbabel -D 0 -i geo -f "/path/to/.loc" -o garmin -F usb:


#:391#
# commandlinefu.com by David Winterbottom

# Twitpic upload and Tweet
curl --form username=from_twitter --form password=from_twitter --form media=@/pa
th/to/image --form-string "message=tweet" http://twitpic.com/api/uploadAndPost


#:392#
# commandlinefu.com by David Winterbottom

# Convert a SVG file to grayscale
inkscape -f file.svg --verb=org.inkscape.color.grayscale --verb=FileSave --verb=
FileClose


#:393#
# commandlinefu.com by David Winterbottom


#:394#
# commandlinefu.com by David Winterbottom

# Hexadecimal dump of a file, pipe, or anything
cat testfile | hexdump -C


#:395#
# commandlinefu.com by David Winterbottom

# List all available commands (bash, ksh93)
printf "%s\n" ${PATH//:/\/* }

# List all available commands
in bash hit "tab" twice and answer y

# List files in tarballs
find <path> -name "*.tgz" -or -name "*.tar.gz" | while read file; do echo "$file
: "; tar -tzf $file; done

# List all text files (exclude binary files)
find . -type f -exec file {} \; | grep ".*: .* text" | cut -f 1 -d :

# List all text files (exclude binary files)
find . | xargs file | grep ".*: .* text" | sed "s;\(.*\): .* text.*;\1;"

# find all active IP addresses in a network
arp-scan -l

# find all active IP addresses in a network
nmap -sP 192.168.0.*

# Show (only) list of files changed by commit
git show --relative --pretty=format:'' --name-only HASH

# Copy files from list with hierarchy
cat files.txt | xargs tar -cv | tar -x -c $DIR/

# list and sort files by size in reverse order (file size in human readable outp
ut)
ls -S -lhr


#:396#
# commandlinefu.com by David Winterbottom

# Check reverse DNS
nslookup {ip}

# Check reverse DNS
dig +short -x {ip}

# Check reverse DNS
dig -x {IP}

# Check reverse DNS
host {checkIp or hostname} [dns server]

# list and sort files by size in reverse order (file size in human readable outp
ut)
ls -S -lhr


#:397#
# commandlinefu.com by David Winterbottom

# list and sort files by size in reverse order (file size in human readable outp
ut)
ls -S -lhr


#:398#
# commandlinefu.com by David Winterbottom

# Alternative size (human readable) of files and directories (biggest last)
du -ms * | sort -nk1

# Alternative size (human readable) of directories (biggest last)
function duf { du -sk "$@" | sort -n | while read size fname; do for unit in k M
 G T P E Z Y; do if [ $size -lt 1024 ]; then echo -e "${size}${unit}\t${fname}";
 break; fi; size=$((size/1024)); done; done; }

# Alternative size (human readable) of files and directories (biggest last)
du -ms * .[^.]*| sort -nk1

# Alternative size (human readable) of directories (biggest first)
function duf { du -k $@ | sort -rn | perl -ne '($s,$f)=split(/\t/,$_,2);for(qw(K
 M G T)){if($s<1024){$x=($s<10?"%.1f":"%3d");printf("$x$_\t%s",$s,$f);last};$s/=
1024}' }

# list and sort files by size in reverse order (file size in human readable outp
ut)
ls -S -lhr


#:399#
# commandlinefu.com by David Winterbottom

# list and sort files by size in reverse order (file size in human readable outp
ut)
ls -S -lhr


#:400#
# commandlinefu.com by David Winterbottom

# Remove security limitations from PDF documents using ghostscript
gs -q -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=OUTPUT.pdf -c .setpdfwrit
e -f INPUT.pdf

# Execute text from the OS X clipboard.
`pbpaste` | pbcopy

# Add user to group on OS X 10.5
sudo dscl localhost -append /Local/Default/Groups/admin GroupMembership username

# Get the size of all the directories in current directory
du -hd 1

# OSX command to take badly formatted xml from the clipboard, cleans it up and p
uts it back into the clipboard.
pbpaste | tidy -xml -wrap 0 | pbcopy

# Paste OS X clipboard contents to a file on a remote machine
pbpaste | ssh user@hostname 'cat > ~/my_new_file.txt'

# Use FileMerge to compare two files
opendiff <file1> <file2>

# Mac Sleep Timer
sudo pmset schedule sleep "08/31/2009 00:00:00"

# Mac OS X: Change Color of the ls Command
export LSCOLORS=gxfxcxdxbxegedabagacad

# Enable Hibernate in OS X
sudo pmset -a hibernatemode 1

# Install an mpkg from the command line on OSX
sudo installer -pkg /Volumes/someapp/someapp.mpkg -target /

# Mount a disk image (dmg) file in Mac OSX
hdiutil attach somefile.dmg

# sends your internal IP by email
ifconfig en1 | awk '/inet / {print $2}' | mail -s "hello world" email@email.com


#:401#
# commandlinefu.com by David Winterbottom

# Get ethX mac addresses
ifconfig | awk '/HW/ {print $5}'

# Get ethX mac addresses
ip link show eth0 | grep "link/ether" | awk '{print $2}'

# Get ethX mac addresses
ip link | grep 'link/ether' | awk '{print $2}'

# Set default "New Page" as HTML in TextMate
defaults write com.macromates.textmate OakDefaultLanguage 17994EC8-6B1D-11D9-AC3
A-000D93589AF6

# Add user to group on OS X 10.5
sudo dscl localhost -append /Local/Default/Groups/admin GroupMembership username

# Show Mac OS X version information
sw_vers

# Open in TextMate Sidebar files (recursively) with names matching REGEX_A and n
ot matching REGEX_B
mate - `find * -type f -regex 'REGEX_A' | grep -v -E 'REGEX_B'`

# Mac, ip, and hostname change - sweet!
ifconfig eth0 down hw ether (newmacaddresshere) && ifconfig eth0 up && ifconfig
eth0 (newipaddresshere) netmask 255.255.255.0 up && /bin/hostname (newhostnamehe
re)

# Mac Sleep Timer
sudo pmset schedule sleep "08/31/2009 00:00:00"

# sends your internal IP by email
ifconfig en1 | awk '/inet / {print $2}' | mail -s "hello world" email@email.com


#:402#
# commandlinefu.com by David Winterbottom

# Quickly Encrypt a file with gnupg and email it with mailx
cat private-file | gpg2 --encrypt --armor --recipient "Disposable Key" | mailx -
s "Email Subject" user@email.com

# Will email user@example.com when all Rsync processes have finished.
$(while [ ! -z "$(pgrep rsync)" ]; do echo; done; echo "rsync done" | mailx user
@example.com) > /dev/null &

# Send email with one or more binary attachments
echo "Body goes here" | mutt -s "A subject" -a /path/to/file.tar.gz recipient@ex
ample.com

# sends your internal IP by email
ifconfig en1 | awk '/inet / {print $2}' | mail -s "hello world" email@email.com


#:403#
# commandlinefu.com by David Winterbottom

# Show the meta information on a package (dependency , statuts ..) on debian der
ivative distro
aptitude show packages_name

# Search for available software on a debian package system (Ubuntu)
aptitude search NAME

# Remove unused libs/packages
aptitude remove $(deborphan)

# remove unneeded configuration files in debian
dpkg-query -l| grep -v "ii " | grep "rc " | awk '{print $2" "}' | tr -d "\n" | x
args aptitude purge -y

# Purge configuration files of removed packages on  debian based systems
sudo aptitude purge `dpkg --get-selections | grep deinstall | awk '{print $1}'`


#:404#
# commandlinefu.com by David Winterbottom

# Rename .JPG to .jpg recursively
find /path/to/images -name '*.JPG' -exec rename "s/.JPG/.jpg/g" \{\} \;

# convert filenames in current directory to lowercase
rename 'y/A-Z/a-z/' *

# Smart renaming
mmv 'banana_*_*.asc' 'banana_#2_#1.asc'

# Clean up poorly named TV shows.
rename -v 's/.*[s,S](\d{2}).*[e,E](\d{2}).*\.avi/SHOWNAME\ S$1E$2.avi/' poorly.n
amed.file.s01e01.avi

# Replace spaces in filenames with underscorees
rename -v 's/ /_/g' *

# Add
rename 's/^/prefix/' *

# Batch file name renaming (copying or moving) w/ glob matching.
for x in *.ex1; do mv "${x}" "${x%ex1}ex2"; done

# Uniformly correct filenames in a directory
for i in  *;do mv "$i" "$(echo $i | sed s/PROBLEM/FIX/g)";done

# Smart renaming
ls | sed -n -r 's/banana_(.*)_([0-9]*).asc/mv & banana_\2_\1.asc/gp' | sh


#:405#
# commandlinefu.com by David Winterbottom

# Search trought pidgin's conversation logs for "searchterm", and output the res
ult.
grep -Ri searchterm  ~/.purple/logs/*  | sed -e 's/<.*?>//g'

# find/edit your forgotten buddy pounces for pidgin
vim ~/.purple/pounces.xml


#:406#
# commandlinefu.com by David Winterbottom

# remove unneeded configuration files in debian
dpkg-query -l| grep -v "ii " | grep "rc " | awk '{print $2" "}' | tr -d "\n" | x
args aptitude purge -y


#:407#
# commandlinefu.com by David Winterbottom

# Find jpeg images and copy them to a central location
find . -iname "*.jpg" -print0 | tr '[A-Z]' '[a-z]' | xargs -0 cp --backup=number
ed -dp -u --target-directory {location} &

# Generate a binary file with all ones (0xff) in it
tr '\000' '\377' < /dev/zero | dd of=allones bs=1024 count=2k

# Outputs a 10-digit random number
tr -c -d 0-9 < /dev/urandom | head -c 10

# Transforms a file to all uppercase.
tr '[:lower:]' '[:upper:]' <"$1"

# search for a file in PATH
type <filename>

# search for a file in PATH
which <filename>

# search for a file in PATH
for L in `echo :$PATH | tr : '\n'`; do F=${L:-"."}/fileName; if [ -f ${F} -o -h
${F} ]; then echo ${F}; break; fi; done

# Show directories in the PATH, one per line
echo $PATH | tr \: \\n

# Remove CR from Windows- / DOS-textfiles
dos2unix file.txt

# Remove CR from Windows- / DOS-textfiles
tr -d '\r' < ${input_txt} > ${output_txt}

# Generate Random Passwords
dd if=/dev/urandom count=200 bs=1 2>/dev/null | tr "\n" " " | sed 's/[^a-zA-Z0-9
]//g' | cut -c-16

# Sorting by rows
infile=$1 for i in $(cat $infile) do     echo $i | tr "," "\n" | sort -n | tr "\
n" "," | sed "s/,$//"    echo done

# Puts every word from a file into a new line
< <infile> tr ' \t' '\n' | tr -s '\n' > <outfile>

# String Capitalization
echo "${STRING}" | tr '[A-Z]' '[a-z]' | awk '{print toupper(substr($0,1,1))subst
r($0,2);}'

# urlencode
(Command too long..See sample Output..)

# List commands with a short summary
find `echo "${PATH}" | tr ':' ' '` -type f | while read COMMAND; do man -f "${CO
MMAND##*/}"; done

# count occurences of each word in novel David Copperfield
wget -q -O- http://www.gutenberg.org/dirs/etext96/cprfd10.txt | sed  '1,419d' |
tr "\n" " " | tr " " "\n" | perl -lpe 's/\W//g;$_=lc($_)' | grep "^[a-z]" | awk
'length > 1' | sort | uniq -c | awk '{print $2"\t"$1}'

# remove unneeded configuration files in debian
dpkg-query -l| grep -v "ii " | grep "rc " | awk '{print $2" "}' | tr -d "\n" | x
args aptitude purge -y


#:408#
# commandlinefu.com by David Winterbottom

# Clone /
find . -path ./mnt -prune -o -path ./lost+found -prune -o -path ./sys -prune -o
-path ./proc -prune -o -print | cpio -pumd /destination && mkdir /destination/mn
t/ && mkdir /destination/proc && mkdir /destination/sys

# Clone current directory into /destination verbosely
find . | cpio -pumdv /destination


#:409#
# commandlinefu.com by David Winterbottom

# pipe output to notify-send
echo 'Desktop SPAM!!!' | while read SPAM_OUT; do notify-send "$SPAM_OUT"; done

# Notify Gnome user of files modified today
OLDIFS=$IFS; IFS=$(echo -en "\n\b"); for f in `find -daystart -mtime 0 -type f -
printf "%f\n"`; do notify-send -t 0 "$f downloaded" ; done; IFS=$OLDIFS

# Run a long job and notify me when it's finished
./my-really-long-job.sh && notify-send "Job finished"

# Send pop-up notifications on Gnome
notify-send ["<title>"] "<body>"


#:410#
# commandlinefu.com by David Winterbottom

# Split lossless audio (ape, flac, wav, wv) by cue file
cuebreakpoints <cue file> | shnsplit -o <lossless audio type> <audio file>


#:411#
# commandlinefu.com by David Winterbottom

# Split lossless audio (ape, flac, wav, wv) by cue file
cuebreakpoints <cue file> | shnsplit -o <lossless audio type> <audio file>


#:412#
# commandlinefu.com by David Winterbottom

# Split lossless audio (ape, flac, wav, wv) by cue file
cuebreakpoints <cue file> | shnsplit -o <lossless audio type> <audio file>


#:413#
# commandlinefu.com by David Winterbottom

# DVD to YouTube ready watermarked MPEG-4 AVI file using mencoder (step 1)
mencoder -oac mp3lame -lameopts cbr=128 -ovc lavc -lavcopts vcodec=mjpeg -o dvd.
avi dvd://0

# Split lossless audio (ape, flac, wav, wv) by cue file
cuebreakpoints <cue file> | shnsplit -o <lossless audio type> <audio file>


#:414#
# commandlinefu.com by David Winterbottom

# Split lossless audio (ape, flac, wav, wv) by cue file
cuebreakpoints <cue file> | shnsplit -o <lossless audio type> <audio file>


#:415#
# commandlinefu.com by David Winterbottom

# Change Gnome wallpaper
gconftool-2 -t string -s /desktop/gnome/background/picture_filename <path_to_ima
ge>


#:416#
# commandlinefu.com by David Winterbottom

# A quick shell command to weed out the small wallpapers
for i in ~/Desktop/Personal/Wallpapers/*.jpg ; { size=$((`identify -format "%wx%
h" $i | sed 's/x/*/'`)) ; if [[ $size -lt 800001 ]] then ; rm -f "$i" ; fi; }

# Change Gnome wallpaper
gconftool-2 -t string -s /desktop/gnome/background/picture_filename <path_to_ima
ge>


#:417#
# commandlinefu.com by David Winterbottom

# Print stack trace of a core file without needing to enter gdb interactively
alias gdbbt="gdb -q -n -ex bt -batch"

# Search gdb help pages
gdb command: apropos <keyword>

# One liner gdb attach to Acrobat
(acroread &);sleep 2;gdb /opt/Adobe/Reader8/Reader/intellinux/bin/acroread `pido
f ld-linux.so.2`


#:418#
# commandlinefu.com by David Winterbottom

# One liner gdb attach to Acrobat
(acroread &);sleep 2;gdb /opt/Adobe/Reader8/Reader/intellinux/bin/acroread `pido
f ld-linux.so.2`


#:419#
# commandlinefu.com by David Winterbottom

# More precise BASH debugging
env PS4=' ${BASH_SOURCE}:${LINENO}(${FUNCNAME[0]}) ' sh -x /etc/profile

# Create a single-use TCP proxy with debug output to stderr
socat -v tcp4-l:<port> tcp4:<host>:<port>

# Create a single-use TCP proxy with copy to stdout
gate() { mkfifo /tmp/sock1 /tmp/sock2 &> /dev/null && nc -p $1 -l < /tmp/sock1 |
 tee /tmp/sock2 & PID=$! && nc $2 $3 < /tmp/sock2 | tee /tmp/sock1; kill -KILL $
PID; rm -f /tmp/sock1 /tmp/sock2 ; }

# One liner gdb attach to Acrobat
(acroread &);sleep 2;gdb /opt/Adobe/Reader8/Reader/intellinux/bin/acroread `pido
f ld-linux.so.2`


#:420#
# commandlinefu.com by David Winterbottom

# List your largest installed packages.
dpkg --get-selections | cut -f1 | while read pkg; do dpkg -L $pkg | xargs -I'{}'
 bash -c 'if [ ! -d "{}" ]; then echo "{}"; fi' | tr '\n' '\000' | du -c --files
0-from - | tail -1 | sed "s/total/$pkg/"; done

# List your largest installed packages.
wajig large


#:421#
# commandlinefu.com by David Winterbottom

# Pick a random image from a directory (and subdirectories) every thirty minutes
 and set it as xfce4 wallpaper
while true; do xfconf-query -c xfce4-desktop -p /backdrop/screen0/monitor0/image
-path -s "$(find <image-directory> -type f -iregex '.*\.\(bmp\|gif\|jpg\|png\)$'
 | sort -R | head -1)"; sleep 30m; done

# Change wallpaper for xfce4 >= 4.6.0
xfconf-query -c xfce4-desktop -p /backdrop/screen0/monitor0/image-path -s <image
-file>


#:422#
# commandlinefu.com by David Winterbottom

# Shred an complete disk, by overwritting its content 10 times
sudo shred -zn10 /dev/sda


#:423#
# commandlinefu.com by David Winterbottom

# Get your public ip
python -c "import socket; s=socket.socket(socket.AF_INET, socket.SOCK_DGRAM); s.
connect(('google.com', 80)); print s.getsockname()[0]"

# Display the list of all opened tabs from Firefox via a python one-liner and a
shell hack to deal with python indentation.
python <<< $'import minjson\nf = open("sessionstore.js", "r")\njdata = minjson.r
ead(f.read())\nf.close()\nfor win in jdata.get("windows"):\n\tfor tab in win.get
("tabs"):\n\t\ti = tab.get("index") - 1\n\t\tprint tab.get("entries")[i].get("ur
l")'

# validate xml in a shell script.
xmlproc_parse.python-xml &>/dev/null <FILE> || exit 1

# retrieve the source address used to contact a given host
python -c 'import socket;  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
; s.connect(("<hostname>", <port>)); print s.getsockname()[0] ; s.close() ;' 2>
/dev/null

# When need to compress the Zope Database
python fsrecovery.py -P 0 -f <path-to-instance>/Data.fs <path-to-instance-destin
ation>/Data.fs.packed

# Get number of diggs for a news URL
curl -s "http://services.digg.com/stories?link=$NEWSURL&appkey=http://www.whatev
er.com&type=json"  | python -m simplejson.tool | grep diggs

# Validate and pretty-print JSON expressions.
echo '{"json":"obj"}' | python -m simplejson.tool

# One-Liner to Display IP Addresses
python -c "import socket; print '\n'.join(socket.gethostbyname_ex(socket.gethost
name())[2])"


#:424#
# commandlinefu.com by David Winterbottom

# Send a local file via email
{ echo -e "$body"; uuencode "$outfile" "$outfile"; } | mail -s "$subject" "$dest
addr" ;

# Checks apache's access_log file, strips the search queries and shoves them up
your e-mail
awk '/q=/{print $11}' /var/log/httpd/access_log.4 | awk -F 'q=' '{print $2}' | s
ed 's/+/ /g;s/%22/"/g;s/q=//' | cut -d "&" -f 1

# Checks apache's access_log file, strips the search queries and shoves them up
your e-mail
cat /var/log/httpd/access_log | grep q= | awk '{print $11}' | awk -F 'q=' '{prin
t $2}' | sed 's/+/ /g;s/%22/"/g;s/q=//' | cut -d "&" -f 1 | mail youremail@isp.c
om -s "[your-site] search strings for `date`"

# Check a server is up. If it isn't mail me.
curl -fs brandx.jp.sme 2&>1 > /dev/null || echo brandx.jp.sme ping failed | mail
 -ne -s'Server unavailable' joker@jp.co.uk

# Check a server is up. If it isn't mail me.
ping -q -c1 -w3 brandx.jp.sme 2&>1 /dev/null || echo brandx.jp.sme ping failed |
 mail -ne -s'Server unavailable' joker@jp.co.uk

# Send a local file via email
echo "see attached file" | mail -a filename -s "subject" email@address

# Send a local file via email
cat filename | uuencode filename | mail -s "Email subject" user@example.com

# Send a local file via email
cat filename | mail -s "Email subject" user@example.com

# Will email user@example.com when all Rsync processes have finished.
$(while [ ! -z "$(pgrep rsync)" ]; do echo; done; echo "rsync done" | mailx user
@example.com) > /dev/null &

# On Mac OS X, runs System Profiler Report and e-mails it to specified address.
system_profiler | mail -s "$HOSTNAME System Profiler Report" user@domain.com

# Move all but the newest 100 emails to a gzipped archive
find $MAILDIR/ -type f -printf '%T@ %p\n' | sort --reverse | sed -e '{ 1,100d; s
/[0-9]*\.[0-9]* \(.*\)/\1/g }' | xargs -i sh -c "cat {}&&rm -f {}" | gzip -c >>A
RCHIVE.gz

# Send email with one or more binary attachments
echo "Body goes here" | mutt -s "A subject" -a /path/to/file.tar.gz recipient@ex
ample.com

# Email HTML content
mailx bar@foo.com -s "HTML Hello" -a "Content-Type: text/html" < body.htm

# mail with attachment
tar cvzf - data1 data2 | uuencode data.tar.gz | mail -s 'data' you@host.fr


#:425#
# commandlinefu.com by David Winterbottom

# Send email with one or more binary attachments
echo "Body goes here" | mutt -s "A subject" -a /path/to/file.tar.gz recipient@ex
ample.com

# mail with attachment
tar cvzf - data1 data2 | uuencode data.tar.gz | mail -s 'data' you@host.fr


#:426#
# commandlinefu.com by David Winterbottom

# Search gdb help pages
gdb command: apropos <keyword>


#:427#
# commandlinefu.com by David Winterbottom

# Search gdb help pages
gdb command: apropos <keyword>


#:428#
# commandlinefu.com by David Winterbottom

# Find status of all symlinks
symlinks -r $(pwd)


#:429#
# commandlinefu.com by David Winterbottom

# Find status of all symlinks
symlinks -r $(pwd)


#:430#
# commandlinefu.com by David Winterbottom

# Visualizing system performance data
(echo "set terminal png;plot '-' u 1:2 t 'cpu' w linespoints;"; sudo vmstat 2 10
 | awk 'NR > 2 {print NR, $13}') | gnuplot > plot.png

# Visualizing system performance data
vmstat 2 10 | awk 'NR > 2 {print NR, $13}' | gnuplot -e "set terminal png;set ou
tput 'v.png';plot '-' u 1:2 t 'cpu' w linespoints;"

# Log your internet download speed
echo $(date +%s) > start-time; URL=http://www.google.com; while true; do echo $(
curl -L --w %{speed_download} -o/dev/null -s $URL) >> bps; sleep 10; done &

# Apply substitution only on the line following a marker
sed '/MARKER/{N;s/THIS/THAT/}'

# Quickly graph a list of numbers
gnuplot -persist <(echo "plot '<(sort -n listOfNumbers.txt)' with lines")


#:431#
# commandlinefu.com by David Winterbottom

# Display a cool clock on your terminal
watch -t -n1 "date +%T|figlet"

# Make anything more awesome
command | figlet


#:432#
# commandlinefu.com by David Winterbottom

# Make anything more awesome
command | figlet


#:433#
# commandlinefu.com by David Winterbottom

# Bash Alias That Plays Music from SomaFM
alias somafm='read -p "Which station? "; mplayer --reallyquiet -vo none -ao sdl
http://somafm.com/startstream=${REPLY}.pls'

# Plays Music from SomaFM
read -p "Which station? "; mplayer --reallyquiet -vo none -ao sdl http://somafm.
com/startstream=${REPLY}.pls


#:434#
# commandlinefu.com by David Winterbottom

# Listen to BBC Radio from the command line.
bbcradio() { local s;echo "Select a station:";select s in 1 1x 2 3 4 5 6 7 "Asia
n Network an" "Nations & Local lcl";do break;done;s=($s);mplayer -playlist "http
://www.bbc.co.uk/radio/listen/live/r"${s[@]: -1}".asx";}

# Bash Alias That Plays Music from SomaFM
alias somafm='read -p "Which station? "; mplayer --reallyquiet -vo none -ao sdl
http://somafm.com/startstream=${REPLY}.pls'

# Plays Music from SomaFM
read -p "Which station? "; mplayer --reallyquiet -vo none -ao sdl http://somafm.
com/startstream=${REPLY}.pls


#:435#
# commandlinefu.com by David Winterbottom

# Show apps that use internet connection at the moment. (Multi-Language)
ss -p

# Log your internet download speed
echo $(date +%s) > start-time; URL=http://www.google.com; while true; do echo $(
curl -L --w %{speed_download} -o/dev/null -s $URL) >> bps; sleep 10; done &

# Show apps that use internet connection at the moment.
lsof -P -i -n | cut -f 1 -d " "| uniq | tail -n +2

# Show apps that use internet connection at the moment. (Multi-Language)
lsof -P -i -n

# Show apps that use internet connection at the moment. (Multi-Language)
netstat -lantp | grep -i stab | awk -F/ '{print $2}' | sort | uniq

# Show apps that use internet connection at the moment.
netstat -lantp | grep -i establ | awk -F/ '{print $2}' | sort | uniq

# Show apps that use internet connection at the moment.
netstat -lantp | grep -i establ | awk -F/ '{print $2}' | uniq | sort

# Get the information about the internet usage from the commandline.
vnstat

# Bash Alias That Plays Music from SomaFM
alias somafm='read -p "Which station? "; mplayer --reallyquiet -vo none -ao sdl
http://somafm.com/startstream=${REPLY}.pls'

# Plays Music from SomaFM
read -p "Which station? "; mplayer --reallyquiet -vo none -ao sdl http://somafm.
com/startstream=${REPLY}.pls


#:436#
# commandlinefu.com by David Winterbottom

# Command Line to Get the Stock Quote via Yahoo
curl -s 'http://download.finance.yahoo.com/d/quotes.csv?s=csco&f=l1'


#:437#
# commandlinefu.com by David Winterbottom

# Create subdirectory and move files into it
(ls; mkdir subdir; echo subdir) | xargs mv

# Execute text from the OS X clipboard.
`pbpaste` | pbcopy

# throttle bandwidth with cstream
tar -cj /backup | cstream -t 777k | ssh host 'tar -xj -C /backup'

# Working random fact generator
lynx -dump randomfunfacts.com | grep -A 3 U | sed 1D


#:438#
# commandlinefu.com by David Winterbottom

# Use Cygwin to talk to the Windows clipboard
cat /dev/clipboard; $(somecommand) > /dev/clipboard

# Working random fact generator
lynx -dump randomfunfacts.com | grep -A 3 U | sed 1D


#:439#
# commandlinefu.com by David Winterbottom

# Chage default shell for all users [FreeBSD]
cd /usr/home && for i in *;do chsh -s bash $i;done

# Detect encoding of a text file
file -i <textfile>

# Delete all aliases for a network interface on a (Free)BSD system
ifconfig | grep "0xffffffff" | awk '{ print $2 }' | xargs -n 1 ifconfig em0 dele
te

# Working random fact generator
lynx -dump randomfunfacts.com | grep -A 3 U | sed 1D


#:440#
# commandlinefu.com by David Winterbottom

# Launch a VirtualBox virtual machine
VBoxManage startvm "name"


#:441#
# commandlinefu.com by David Winterbottom

# Launch a VirtualBox virtual machine
VBoxManage startvm "name"


#:442#
# commandlinefu.com by David Winterbottom

# Launch a VirtualBox virtual machine
VBoxManage startvm "name"


#:443#
# commandlinefu.com by David Winterbottom

# Save VM running as headless
VBoxManage controlvm ServidorProducao savestate

# Running VirtualBox as headless
nohup VBoxHeadless -p 3052 -startvm ServidorProducao &

# convert vdi to vmdk (virtualbox hard disk conversion to vmware hard disk forma
t)
VBoxManage internalcommands converttoraw winxp.vdi winxp.raw && qemu-img convert
 -O vmdk winxp.raw winxp.vmdk && rm winxp.raw

# Get a list of all your VirtualBox virtual machines by name and UUID from the s
hell
VBoxManage list vms

# run a VirtualBox virtual machine without a gui
VBoxHeadless -s <name|uuid>

# Launch a VirtualBox virtual machine
VBoxManage startvm "name"


#:444#
# commandlinefu.com by David Winterbottom

# Enable ** to expand files recursively (>=bash-4.0)
shopt -s globstar


#:445#
# commandlinefu.com by David Winterbottom

# Expand shell variables in sed scripts
expanded_script=$(eval "echo \"$(cat ${sed_script_file})\"") && sed -e "${expand
ed_script}" your_input_file

# Enable ** to expand files recursively (>=bash-4.0)
shopt -s globstar


#:446#
# commandlinefu.com by David Winterbottom

# Add Password Protection to a file your editing in vim.
vim -x <FILENAME>


#:447#
# commandlinefu.com by David Winterbottom

# Add a shadow to picture
convert {$file_in} \( +clone -background black -shadow 60x5+10+10 \) +swap -back
ground none -layers merge +repage  {$file_out}


#:448#
# commandlinefu.com by David Winterbottom


#:449#
# commandlinefu.com by David Winterbottom

# c_rehash replacement
for file in *.pem; do ln -s $file `openssl x509 -hash -noout -in $file`.0; done


#:450#
# commandlinefu.com by David Winterbottom

# Convert encoding of given files from one encoding to another
iconv -f utf8 -t utf16 /path/to/file

# Detect encoding of a text file
file -i <textfile>

# Uniformly correct filenames in a directory
for i in  *;do mv "$i" "$(echo $i | sed s/PROBLEM/FIX/g)";done

# Encoding with base64
echo "Hello world" | base64


#:451#
# commandlinefu.com by David Winterbottom

# Find corrupted jpeg image files
find . -name "*jpg" -exec jpeginfo -c {} \; | grep -E "WARNING|ERROR"

# sync a directory of corrupted jpeg with a source directory
for i in *jpg; do jpeginfo -c $i | grep -E "WARNING|ERROR" | cut -d " " -f 1 | x
args -I '{}' find /mnt/sourcerep -name {} -type f -print0 | xargs -0 -I '{}' cp
-f {} ./ ; done


#:452#
# commandlinefu.com by David Winterbottom

# Find jpeg images and copy them to a central location
find . -iname "*.jpg" -print0 | tr '[A-Z]' '[a-z]' | xargs -0 cp --backup=number
ed -dp -u --target-directory {location} &

# for all flv files in a dir, grab the first frame and make a jpg.
for f in *.flv; do ffmpeg -y -i "$f" -f image2 -ss 10 -vframes 1 -an "${f%.flv}.
jpg"; done

# sync a directory of corrupted jpeg with a source directory
for i in *jpg; do jpeginfo -c $i | grep -E "WARNING|ERROR" | cut -d " " -f 1 | x
args -I '{}' find /mnt/sourcerep -name {} -type f -print0 | xargs -0 -I '{}' cp
-f {} ./ ; done


#:453#
# commandlinefu.com by David Winterbottom

# Find corrupted jpeg image files
find . -name "*jpg" -exec jpeginfo -c {} \; | grep -E "WARNING|ERROR"

# sync a directory of corrupted jpeg with a source directory
for i in *jpg; do jpeginfo -c $i | grep -E "WARNING|ERROR" | cut -d " " -f 1 | x
args -I '{}' find /mnt/sourcerep -name {} -type f -print0 | xargs -0 -I '{}' cp
-f {} ./ ; done


#:454#
# commandlinefu.com by David Winterbottom

# Synchronize both your system clock and hardware clock and calculate/adjust tim
e drift
ntpdate pool.ntp.org && hwclock --systohc && hwclock --adjust

# sync a directory of corrupted jpeg with a source directory
for i in *jpg; do jpeginfo -c $i | grep -E "WARNING|ERROR" | cut -d " " -f 1 | x
args -I '{}' find /mnt/sourcerep -name {} -type f -print0 | xargs -0 -I '{}' cp
-f {} ./ ; done


#:455#
# commandlinefu.com by David Winterbottom

# Start a file browser in the current directory
screen -d -m nautilus --no-desktop `pwd`


#:456#
# commandlinefu.com by David Winterbottom

# Random line from bash.org  (funny IRC quotes)
curl -s http://bash.org/?random1|grep -oE "<p class=\"quote\">.*</p>.*</p>"|grep
 -oE "<p class=\"qt.*?</p>"|sed -e 's/<\/p>/\n/g' -e 's/<p class=\"qt\">//g' -e
's/<p class=\"qt\">//g'|perl -ne 'use HTML::Entities;print decode_entities($_),"
\n"'|head -1


#:457#
# commandlinefu.com by David Winterbottom

# Random line from bash.org  (funny IRC quotes)
curl -s http://bash.org/?random1|grep -oE "<p class=\"quote\">.*</p>.*</p>"|grep
 -oE "<p class=\"qt.*?</p>"|sed -e 's/<\/p>/\n/g' -e 's/<p class=\"qt\">//g' -e
's/<p class=\"qt\">//g'|perl -ne 'use HTML::Entities;print decode_entities($_),"
\n"'|head -1


#:458#
# commandlinefu.com by David Winterbottom

# Random line from bash.org  (funny IRC quotes)
curl -s http://bash.org/?random1|grep -oE "<p class=\"quote\">.*</p>.*</p>"|grep
 -oE "<p class=\"qt.*?</p>"|sed -e 's/<\/p>/\n/g' -e 's/<p class=\"qt\">//g' -e
's/<p class=\"qt\">//g'|perl -ne 'use HTML::Entities;print decode_entities($_),"
\n"'|head -1


#:459#
# commandlinefu.com by David Winterbottom

# Convert decimal numbers to binary
function decToBin { echo "ibase=10; obase=2; $1" | bc; }

# no more line wrapping in your terminal
function nowrap { export COLS=`tput cols` ; cut -c-$COLS ; unset COLS ; }

# search for a file in PATH
function sepath { echo $PATH |tr ":" "\n" |sort -u |while read L ; do cd "$L" 2>
/dev/null && find . \( ! -name . -prune \) \( -type f -o -type l \) 2>/dev/null
|sed "s@^\./@@" |egrep -i "${*}" |sed "s@^@$L/@" ; done ; }

# bash/ksh function: given a file, cd to the directory it lives
function fcd () { [ -f $1  ] && { cd $(dirname $1);  } || { cd $1 ;  } pwd }

# Create a list of binary numbers
echo {0..1}{0..1}{0..1}{0..1}

# Expand shell variables in sed scripts
expanded_script=$(eval "echo \"$(cat ${sed_script_file})\"") && sed -e "${expand
ed_script}" your_input_file


#:460#
# commandlinefu.com by David Winterbottom

# Safely store your gpg key passphrase.
pwsafe -qa "gpg keys"."$(finger `whoami` | grep Name | awk '{ print $4" "$5 }')"


#:461#
# commandlinefu.com by David Winterbottom

# Safely store your gpg key passphrase.
pwsafe -qa "gpg keys"."$(finger `whoami` | grep Name | awk '{ print $4" "$5 }')"


#:462#
# commandlinefu.com by David Winterbottom

# Safely store your gpg key passphrase.
pwsafe -qa "gpg keys"."$(finger `whoami` | grep Name | awk '{ print $4" "$5 }')"


#:463#
# commandlinefu.com by David Winterbottom

# Define an alias with a correct completion
old='apt-get'; new="su-${old}"; command="sudo ${old}"; alias "${new}=${command}"
; $( complete | sed -n "s/${old}$/${new}/p" ); alias ${new}; complete -p ${new}

# Inserts the results of an autocompletion in the command line
ESC *

# Ultra shortcut for ssh root@
alias s='ssh -l root'


#:464#
# commandlinefu.com by David Winterbottom

# locate a filename, make sure it exists and display it with full details
locate -e somefile | xargs ls -l

# Search commandlinefu.com from the command line using the API
cmdfu(){ curl "http://www.commandlinefu.com/commands/matching/$@/$(echo -n $@ |
openssl base64)/plaintext"; }

# Search and replace in multiple files and save them with the same names - quick
ly and effectively!
for files in $(ls -A directory_name); do sed 's/search/replaced/g' $files > $fil
es.new && mv $files.new $files; done;


#:465#
# commandlinefu.com by David Winterbottom

# recursive search and replace old with new string, inside files
$rpl -R oldstring newstring folder

# Open in TextMate Sidebar files (recursively) with names matching REGEX_A and n
ot matching REGEX_B
mate - `find * -type f -regex 'REGEX_A' | grep -v -E 'REGEX_B'`

# Search and replace in multiple files and save them with the same names - quick
ly and effectively!
for files in $(ls -A directory_name); do sed 's/search/replaced/g' $files > $fil
es.new && mv $files.new $files; done;


#:466#
# commandlinefu.com by David Winterbottom

# FAST and NICE Search and Replace for Strings in Files
nice -n19 sh -c 'S=askapache && R=htaccess; find . -type f|xargs -P5 -iFF grep -
l -m1 "$S" FF|xargs -P5 -iFF sed -i -e s%${S}%${R}% FF'

# How to run a command on a list of remote servers read from a file
dsh -M -c -f servers -- "command HERE"

# Search and replace in multiple files and save them with the same names - quick
ly and effectively!
for files in $(ls -A directory_name); do sed 's/search/replaced/g' $files > $fil
es.new && mv $files.new $files; done;


#:467#
# commandlinefu.com by David Winterbottom

# Search and replace in multiple files and save them with the same names - quick
ly and effectively!
for files in $(ls -A directory_name); do sed 's/search/replaced/g' $files > $fil
es.new && mv $files.new $files; done;


#:468#
# commandlinefu.com by David Winterbottom

# Search and replace in multiple files and save them with the same names - quick
ly and effectively!
for files in $(ls -A directory_name); do sed 's/search/replaced/g' $files > $fil
es.new && mv $files.new $files; done;


#:469#
# commandlinefu.com by David Winterbottom

# Get an IP address out of fail2ban jail
iptables -D fail2ban-SSH -s <ip_address_to_be_set_free> -j DROP


#:470#
# commandlinefu.com by David Winterbottom

# Extract all urls from last firefox sessionstore used in a portable way.
perl -lne 'print for /url":"\K[^"]+/g' $(ls -t ~/.mozilla/firefox/*/sessionstore
.js | sed q)

# Get number of diggs for a news URL
curl -s "http://services.digg.com/stories?link=$NEWSURL&appkey=http://www.whatev
er.com&type=json"  | python -m simplejson.tool | grep diggs

# Validate and pretty-print JSON expressions.
echo '{"json":"obj"}' | python -m simplejson.tool


#:471#
# commandlinefu.com by David Winterbottom

# validate the syntax of a perl-compatible regular expression
perl -we 'my $regex = eval {qr/.*/}; die "$@" if $@;'

# Check if variable is a number
if [ "$testnum" -eq "$testnum" 2>/dev/null ]; then echo It is numeric; fi

# quick and easy way of validating a date format of yyyy-mm-dd and returning a b
oolean
echo 2006-10-10  | grep -c '^[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]$'


#:472#
# commandlinefu.com by David Winterbottom

# wrap long lines of a text
fold -s -w 90 file.txt


#:473#
# commandlinefu.com by David Winterbottom

# wrap long lines of a text
fold -s -w 90 file.txt


#:474#
# commandlinefu.com by David Winterbottom

# Randomize lines (opposite of | sort)
perl -wl -e '@f=<>; for $i (0 .. $#f) { $r=int rand ($i+1); @f[$i, $r]=@f[$r,$i]
 if ($i!=$r); } chomp @f; print join $/, @f;' try.txt

# Randomize lines (opposite of | sort)
random -f <file>

# Randomize lines (opposite of | sort)
cat ~/SortedFile.txt | perl -wnl -e '@f=<>; END{ foreach $i (reverse 0 .. $#f) {
 $r=int rand ($i+1); @f[$i, $r]=@f[$r,$i] unless ($i==$r); }  chomp @f; foreach
$line (@f){ print $line; }}'

# List all text files (exclude binary files)
find . -type f -exec file {} \; | grep ".*: .* text" | cut -f 1 -d :

# List all text files (exclude binary files)
find . | xargs file | grep ".*: .* text" | sed "s;\(.*\): .* text.*;\1;"

# Remove CR from Windows- / DOS-textfiles
dos2unix file.txt

# Remove CR from Windows- / DOS-textfiles
tr -d '\r' < ${input_txt} > ${output_txt}

# write text or append to a file
cat <<.>> somefilename

# wrap long lines of a text
fold -s -w 90 file.txt


#:475#
# commandlinefu.com by David Winterbottom

# wrap long lines of a text
fold -s -w 90 file.txt


#:476#
# commandlinefu.com by David Winterbottom

# IFS - use entire lines in your for cycles
export IFS=$(echo -e "\n")

# wrap long lines of a text
fold -s -w 90 file.txt


#:477#
# commandlinefu.com by David Winterbottom

# Convert a file from ISO-8859-1 (or whatever) to UTF-8 (or whatever)
tcs -f 8859-1 -t utf /some/file


#:478#
# commandlinefu.com by David Winterbottom

# mount an iso
mount -o loop -t iso9660 my.iso /mnt/something

# How to copy CD/DVD into hard disk (.iso)
dd if=/dev/cdrom of=whatever.iso

# Output a SSL certificate start or end date
date --date="$(openssl x509 -in xxxxxx.crt -noout -startdate | cut -d= -f 2)" --
iso-8601

# Convert a file from ISO-8859-1 (or whatever) to UTF-8 (or whatever)
tcs -f 8859-1 -t utf /some/file

# Mount a .iso file in UNIX/Linux
mount /path/to/file.iso /mnt/cdrom -oloop


#:479#
# commandlinefu.com by David Winterbottom

# Schedule Nice Background Commands That Won't Die on Logout - Alternative to no
hup and at
( trap '' 1; ( nice -n 19 sleep 2h && command rm -v -rf /garbage/ &>/dev/null &&
 trap 1 ) & )

# Function that outputs dots every second until command completes
sleeper(){ while `ps -p $1 &>/dev/null`; do echo -n "${2:-.}"; sleep ${3:-1}; do
ne; }; export -f sleeper

# Put the machine to sleep after the download(wget) is done
while [ -n "`pgrep wget`" ]; do sleep 2 ;done; [ -e "/tmp/nosleep"] || echo  mem
 >/sys/power/state

# Multiple Timed Execution of subshells sleeping in the background using job con
trol and sleep.
S=$SSH_TTY && (sleep 3 && echo -n 'Peace... '>$S & ) && (sleep 5 && echo -n 'Lov
e... '>$S & ) && (sleep 7 && echo 'and Intergalactic Happiness!'>$S & )

# Mac Sleep Timer
sudo pmset schedule sleep "08/31/2009 00:00:00"


#:480#
# commandlinefu.com by David Winterbottom

# Mac Sleep Timer
sudo pmset schedule sleep "08/31/2009 00:00:00"


#:481#
# commandlinefu.com by David Winterbottom

# Mac Sleep Timer
sudo pmset schedule sleep "08/31/2009 00:00:00"


#:482#
# commandlinefu.com by David Winterbottom

# Verbosely delete files matching specific name pattern, older than 15 days.
find /backup/directory -name "FILENAME_*" -mtime +15 -exec rm -vf {};

# Verbosely delete files matching specific name pattern, older than 15 days.
rm -vf /backup/directory/**/FILENAME_*(m+15)

# Verbosely delete files matching specific name pattern, older than 15 days.
find /backup/directory -name "FILENAME_*" -mtime +15 | xargs rm -vf

# Remove all .svn folders inside a folder
find . -name "\.svn" -exec rm -rf {} ";"


#:483#
# commandlinefu.com by David Winterbottom

# Copy data using gtar
gtar cpf - . | (cd /dest/directory; gtar xpf -)


#:484#
# commandlinefu.com by David Winterbottom

# Copy data using gtar
gtar cpf - . | (cd /dest/directory; gtar xpf -)


#:485#
# commandlinefu.com by David Winterbottom

# Updating the status on identi.ca using curl.
curl -u USER:PASS -d status="NEW STATUS" http://identi.ca/api/statuses/update.xm
l


#:486#
# commandlinefu.com by David Winterbottom

# Display a block of text with vim with offset, like with AWK
vim -e -s -c 'g/start_pattern/+1,/stop_pattern/-1 p' -cq file.txt

# How to Find the Block Size
/sbin/dumpe2fs /dev/hda2 | grep 'Block size'


#:487#
# commandlinefu.com by David Winterbottom

# Updating the status on identi.ca using curl.
curl -u USER:PASS -d status="NEW STATUS" http://identi.ca/api/statuses/update.xm
l


#:488#
# commandlinefu.com by David Winterbottom

# DVD to YouTube ready watermarked MPEG-4 AVI file using mencoder (step 1)
mencoder -oac mp3lame -lameopts cbr=128 -ovc lavc -lavcopts vcodec=mjpeg -o dvd.
avi dvd://0

# Rip DVD to YouTube ready MPEG-4 AVI file using mencoder
mencoder -oac mp3lame -lameopts cbr=128 -ovc lavc -lavcopts vcodec=mpeg4 -ffourc
c xvid -vf scale=320:-2,expand=:240:::1 -o output.avi dvd://0

# Dump dvd from a different machine onto this one.
ssh user@machine_A dd if=/dev/dvd0 > dvddump.iso

# How to copy CD/DVD into hard disk (.iso)
dd if=/dev/cdrom of=whatever.iso

# Rip a DVD to AVI format
mencoder dvd://1 -aid 128 -o track-1.avi -oac copy -ovc lavc -lavcopts vcodec=mp
eg4


#:489#
# commandlinefu.com by David Winterbottom

# Rip a DVD to AVI format
mencoder dvd://1 -aid 128 -o track-1.avi -oac copy -ovc lavc -lavcopts vcodec=mp
eg4


#:490#
# commandlinefu.com by David Winterbottom

# Creates Solaris alternate boot environment on another zpool.
lucreate -n be1 [-c be0] -p zpool1

# Creating a ZFS Storage Pool by Using Files
zpool create tank /path/to/file/a /path/to/file/b

# Creating a Mirrored Storage Pool using Zpool
zpool create tank mirror c0t0d0 c0t1d0 mirror c0t2d0 c0t3d0


#:491#
# commandlinefu.com by David Winterbottom

# Creating a ZFS Storage Pool by Using Files
zpool create tank /path/to/file/a /path/to/file/b

# Creating a Mirrored Storage Pool using Zpool
zpool create tank mirror c0t0d0 c0t1d0 mirror c0t2d0 c0t3d0


#:492#
# commandlinefu.com by David Winterbottom

# find largest file in /var
find /var -mount -ls -xdev | /usr/bin/sort -nr +6 | more


#:493#
# commandlinefu.com by David Winterbottom

# Record live sound in Vorbis (eg for bootlegs or to take audio notes)
rec -c 2 -r 44100 -s -t wav - | oggenc -q 5 --raw --raw-chan=2 --raw-rate=44100
--raw-bits=16 - > MyLiveRecording.ogg


#:494#
# commandlinefu.com by David Winterbottom

# Make ogg file from wav file
oggenc --tracknum='track' track.cdda.wav -o 'track.ogg'

# Record live sound in Vorbis (eg for bootlegs or to take audio notes)
rec -c 2 -r 44100 -s -t wav - | oggenc -q 5 --raw --raw-chan=2 --raw-rate=44100
--raw-bits=16 - > MyLiveRecording.ogg


#:495#
# commandlinefu.com by David Winterbottom

# Record live sound in Vorbis (eg for bootlegs or to take audio notes)
rec -c 2 -r 44100 -s -t wav - | oggenc -q 5 --raw --raw-chan=2 --raw-rate=44100
--raw-bits=16 - > MyLiveRecording.ogg


#:496#
# commandlinefu.com by David Winterbottom

# Manually Pause/Unpause Firefox Process with POSIX-Signals
killall -STOP -m firefox


#:497#
# commandlinefu.com by David Winterbottom

# Manually Pause/Unpause Firefox Process with POSIX-Signals
killall -STOP -m firefox


#:498#
# commandlinefu.com by David Winterbottom

# Download file with multiple simultaneous connections
aria2c -s 4 http://my/url

# Manually Pause/Unpause Firefox Process with POSIX-Signals
killall -STOP -m firefox


#:499#
# commandlinefu.com by David Winterbottom

# Use heading subtitle file as watermark using mencoder
mencoder -sub heading.ssa -subpos 0 -subfont-text-scale 4 -utf8 -oac mp3lame -la
meopts cbr=128 -ovc lavc -lavcopts vcodec=mjpeg -vf scale=320:-2,expand=:240:::1
 -o output.avi input.flv

# FLV to AVI with subtitles and forcing audio sync using mencoder
mencoder -sub subs.ssa -utf8 -subfont-text-scale 4 -oac mp3lame -lameopts cbr=12
8 -ovc lavc -lavcopts vcodec=mpeg4 -ffourcc xvid -o output.avi input.flv

# Grab all .flv files from a webpage to the current working directory
wget `lynx -dump http://www.ebow.com/ebowtube.php | grep .flv$ | sed 's/[[:blank
:]]\+[[:digit:]]\+\. //g'`

# convert all files in a dir of a certain type to flv
for f in *.m4a; do ffmpeg -i "$f" "${f%.m4a}.flv"; done

# for all flv files in a dir, grab the first frame and make a jpg.
for f in *.flv; do ffmpeg -y -i "$f" -f image2 -ss 10 -vframes 1 -an "${f%.flv}.
jpg"; done


#:500#
# commandlinefu.com by David Winterbottom

# Connect to SMTP server using STARTTLS
openssl s_client -starttls smtp -crlf -connect 127.0.0.1:25

# Create AUTH PLAIN string to test SMTP AUTH session
printf '\!:1\0\!:1\0\!:2' | mmencode | tr -d '\n' | sed 's/^/AUTH PLAIN /'

# Email HTML content
mailx bar@foo.com -s "HTML Hello" -a "Content-Type: text/html" < body.htm


#:501#
# commandlinefu.com by David Winterbottom

# List out classes in of all htmls in directory
find . -name '*.html' -exec  'sed' 's/.*class="\([^"]*\?\)".*/\1/ip;d' '{}' ';'
|sort -su

# Save an HTML page, and covert it to a .pdf file
wget $URL | htmldoc --webpage -f "$URL".pdf - ; xpdf "$URL".pdf &

# Email HTML content
mailx bar@foo.com -s "HTML Hello" -a "Content-Type: text/html" < body.htm


#:502#
# commandlinefu.com by David Winterbottom

# Extract tar.gz in a single command
gunzip < foo.tar.gz | tar xvf -


#:503#
# commandlinefu.com by David Winterbottom

# copy working directory and compress it on-the-fly while showing progress
tar -cf - . | pv -s $(du -sb . | awk '{print $1}') | gzip > out.tgz

# backup local MySQL database into a folder and removes older then 5 days backup
s
mysqldump -uUSERNAME -pPASSWORD database | gzip > /path/to/db/files/db-backup-`d
ate +%Y-%m-%d`.sql.gz ;find /path/to/db/files/* -mtime +5 -exec rm {} \;

# back up your commandlinefu contributed commands
curl http://www.commandlinefu.com/commands/by/<your username>/rss|gzip ->command
linefu-contribs-backup-$(date +%Y-%m-%d-%H.%M.%S).rss.gz

# Run gunzipped sql file in PostGres, adding to the library since I couldnt find
 this command anywhere else on the web.
gzip -dc /tmp/pavanlimo.gz | psql -U user db

# create tar.gz archive
tar -pczf archive_name.tar.gz /path/to/dir/or/file

# clone a hard drive to a remote directory via ssh tunnel, and compressing the i
mage
# dd if=/dev/sda | gzip -c | ssh user@ip 'dd of=/mnt/backups/sda.dd'

# Create a tar.gz in a single command
tar cvf - foodir | gzip > foo.tar.gz


#:504#
# commandlinefu.com by David Winterbottom

# Return threads count of a process
ps -o thcount -p <process id>

# Count the total number of files in each immediate subdirectory
ps -ef | grep pmon

# Count the total number of files in each immediate subdirectory
find . -type f -printf "%h\n" | cut -d/ -f-2 | sort | uniq -c | sort -rn

# Prints total line count contribution per user for an SVN repository
svn ls -R | egrep -v -e "\/$" | xargs svn blame | awk '{print $2}' | sort | uniq
 -c | sort -r

# Get lines count of a list of files
find . -name "*.sql" -print0 | wc -l --files0-from=-

# Function that counts recursively number of lines of all files in specified fol
ders
count() { find $@ -type f -exec cat {} + | wc -l; }


#:505#
# commandlinefu.com by David Winterbottom

# List files recursively sorted by modified time
find /home/fizz -type f -printf '%TY-%Tm-%Td %TT %p\n' | sort


#:506#
# commandlinefu.com by David Winterbottom

# Eclipse needs to know the path to the local maven repository. Therefore the cl
asspath variable M2_REPO has to be set.
mvn -Declipse.workspace=<path-to-eclipse-workspace> eclipse:add-maven-repo

# Skipping tests in Maven
mvn -Dmaven.test.skip=true install

# Creating a Maven project
mvn archetype:create -DgroupId=my.work -DartifactId=MyProject

# Maven Install 3rd party JAR
mvn install:install-file -Dfile=<path-to-file> -DgroupId=<group-id> -DartifactId
=<artifact-id> -Dversion=<version> -Dpackaging=<packaging> -DgeneratePom=true


#:507#
# commandlinefu.com by David Winterbottom

# View SuSE version
cat /etc/SuSE-release


#:508#
# commandlinefu.com by David Winterbottom

# Preview of a picture in a terminal
img test.jpg

# Find which jars contain a class
find . -name "*.jar" | while read file; do echo "Processing ${file}"; jar -tvf $
file | grep "Foo.class"; done

# Maven Install 3rd party JAR
mvn install:install-file -Dfile=<path-to-file> -DgroupId=<group-id> -DartifactId
=<artifact-id> -Dversion=<version> -Dpackaging=<packaging> -DgeneratePom=true


#:509#
# commandlinefu.com by David Winterbottom

# find files containing text
grep -lir "sometext" * > sometext_found_in.log

# find files containing text
grep -lir "some text" *


#:510#
# commandlinefu.com by David Winterbottom

# Output Detailed Process Tree for any User
psu(){ command ps -Hcl -F S f -u ${1:-$USER}; }

# View Processeses like a fu, fu
pstree -p

# View Processeses like a fu, fu
command ps -Hacl -F S -A f

# View and review the system process tree.
pstree -Gap | less -r


#:511#
# commandlinefu.com by David Winterbottom

# Using scapy to get the IP of the iface used to contact local gw (i.e. supposed
 host IP)
python -c "import scapy.all; print [x[4] for x in scapy.all.conf.route.routes if
 x[2] != '0.0.0.0'][0]"


#:512#
# commandlinefu.com by David Winterbottom

# Get last changed revision to all eclipse projects in a SVN working copy
find . -iname ".project"| xargs -I {} dirname {} | LC_ALL=C xargs -I {} svn info
 {} | grep "Last Changed Rev\|Path" | sed "s/Last Changed Rev: /;/" | sed "s/Pat
h: //" | sed '$!N;s/\n//'

# Eclipse needs to know the path to the local maven repository. Therefore the cl
asspath variable M2_REPO has to be set.
mvn -Declipse.workspace=<path-to-eclipse-workspace> eclipse:add-maven-repo


#:513#
# commandlinefu.com by David Winterbottom

# display typedefs, structs, unions and functions provided by a header file
cpp /usr/include/stdio.h | grep -v '^#' | grep -v '^$' | less


#:514#
# commandlinefu.com by David Winterbottom

# Outputs a 10-digit random number
head -c10 <(echo $RANDOM$RANDOM$RANDOM)

# Substitution cipher
echo "Decode this"| tr [a-zA-Z] $(echo {a..z} {A..Z}|grep -o .|sort -R|tr -d "\n
 ")

# Print a random 8 digit number
jot -s '' -r -n 8 0 9

# Print a random 8 digit number
jot -r -n 8 0 9 | rs -g 0

# Random number generation within a range N, here N=10
echo $(( $RANDOM % 10 + 1 ))

# Generate random password
randpw(){ < /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c${1:-16};echo;}

# Randomize lines in a file
awk 'BEGIN{srand()}{print rand(),$0}' SOMEFILE | sort -n | cut -d ' ' -f2-


#:515#
# commandlinefu.com by David Winterbottom

# DVD to YouTube ready watermarked MPEG-4 AVI file using mencoder (step 1)
mencoder -oac mp3lame -lameopts cbr=128 -ovc lavc -lavcopts vcodec=mjpeg -o dvd.
avi dvd://0

# Record microphone input and output to date stamped mp3 file
arecord -q -f cd -r 44100 -c2 -t raw | lame -S -x -h -b 128 - `date +%Y%m%d%H%M`
.mp3

# Record MP3 audio via ALSA using ffmpeg
ffmpeg -f alsa -ac 2 -i hw:1,0 -acodec libmp3lame -ab 96k output.mp3

# FLV to AVI with subtitles and forcing audio sync using mencoder
mencoder -sub subs.ssa -utf8 -subfont-text-scale 4 -oac mp3lame -lameopts cbr=12
8 -ovc lavc -lavcopts vcodec=mpeg4 -ffourcc xvid -o output.avi input.flv

# create an mp3 with variable bitrate
lame -h -V 6 track9.wav track9.mp3


#:516#
# commandlinefu.com by David Winterbottom

# urldecoding
printf $(echo -n $1 | sed 's/\\/\\\\/g;s/\(%\)\([0-9a-fA-F][0-9a-fA-F]\)/\\x\2/g
')

# urldecoding
sed -e's/%\([0-9A-F][0-9A-F]\)/\\\\\x\1/g' | xargs echo -e


#:517#
# commandlinefu.com by David Winterbottom

# urldecoding
printf $(echo -n $1 | sed 's/\\/\\\\/g;s/\(%\)\([0-9a-fA-F][0-9a-fA-F]\)/\\x\2/g
')

# urldecoding
sed -e's/%\([0-9A-F][0-9A-F]\)/\\\\\x\1/g' | xargs echo -e


#:518#
# commandlinefu.com by David Winterbottom

# Informations sur les connexions reseau
netstat -taupe

# Lire une video dans une console Linux
mplayer -vo caca foo.avi


#:519#
# commandlinefu.com by David Winterbottom

# Lire une video dans une console Linux
mplayer -vo caca foo.avi


#:520#
# commandlinefu.com by David Winterbottom

# Informations sur les connexions reseau
netstat -taupe


#:521#
# commandlinefu.com by David Winterbottom

# Informations sur les connexions reseau
netstat -taupe


#:522#
# commandlinefu.com by David Winterbottom

# Organize a TV-Series season
season=1; for file in $(ls) ; do dir=$(echo $file | sed 's/.*S0$season\(E[0-9]\{
2\}\).*/\1/'); mkdir $dir ; mv $file $dir; done


#:523#
# commandlinefu.com by David Winterbottom

# Organize a TV-Series season
season=1; for file in $(ls) ; do dir=$(echo $file | sed 's/.*S0$season\(E[0-9]\{
2\}\).*/\1/'); mkdir $dir ; mv $file $dir; done


#:524#
# commandlinefu.com by David Winterbottom

# Compress archive(s) or directory(ies) and split the output file
rar a -m5 -v5M -R myarchive.rar /home/


#:525#
# commandlinefu.com by David Winterbottom

# Copy a folder tree through ssh using compression (no temporary files)
ssh <host> 'tar -cz /<folder>/<subfolder>' | tar -xvz

# Uncompress a CSS file
cat somefile.css | awk '{gsub(/{|}|;/,"&\n"); print}' >> uncompressed.css

# Compress archive(s) or directory(ies) and split the output file
rar a -m5 -v5M -R myarchive.rar /home/


#:526#
# commandlinefu.com by David Winterbottom

# Split a tarball into multiple parts
tar cf - <dir>|split -b<max_size>M - <name>.tar.

# Compress archive(s) or directory(ies) and split the output file
rar a -m5 -v5M -R myarchive.rar /home/


#:527#
# commandlinefu.com by David Winterbottom

# change ownership en masse of files owned by a specific user, including files a
nd directories with spaces
find . -uid 0 -print0 | xargs -0 chown foo:foo


#:528#
# commandlinefu.com by David Winterbottom

# change ownership en masse of files owned by a specific user, including files a
nd directories with spaces
find . -uid 0 -print0 | xargs -0 chown foo:foo


#:529#
# commandlinefu.com by David Winterbottom

# List of directories sorted by number of files they contain.
sort -n <( for i in $(find . -maxdepth 1 -mindepth 1 -type d); do echo $(find $i
 | wc -l) ": $i"; done;)


#:530#
# commandlinefu.com by David Winterbottom

# Remove an old gmetric statistic
gmetric -n $METRIC_NAME -v foo -t string -d 10


#:531#
# commandlinefu.com by David Winterbottom

# Display Dilbert strip of the day
display http://dilbert.com$(curl -s dilbert.com|grep -Po '"\K/dyn/str_strip(/0+)
{4}/.*strip.[^\.]*\.gif')

# Show display type
ioreg -lw0 | grep IODisplayEDID | sed "/[^<]*</s///" | xxd -p -r | strings -6


#:532#
# commandlinefu.com by David Winterbottom

# Find all uses of PHP constants in a set of files
$class=ExampleClass; $path=src; for constant in `grep ' const ' $class.php | awk
 '{print $2;}'`; do grep -r "$class::$constant" $path; done

# Find the location of the currently loaded php.ini file
php -i | grep php.ini

# Show a script or config file without comments
egrep -v "^[[:blank:]]*($|#|//|/\*| \*|\*/)"  somefile

# Show a script or config file without comments
sed -e '/^[[:blank:]]*#/d; s/[[:blank:]][[:blank:]]*#.*//'  -e '/^$/d' -e '/^\/\
/.*/d' -e '/^\/\*/d;/^ \* /d;/^ \*\//d' /a/file/with/comments

# Testing php configuration
php -i

# Testing php configuration
php -r "phpinfo\(\);"

# Testing php configuration
php -r phpinfo();

# Check syntax of all PHP files before an SVN commit
for i in `svn status | egrep '^(M|A)' | sed -r 's/\+\s+//' | awk '{ print $2 }'`
 ; do if [ ! -d $i ] ; then php -l $i ; fi ; done


#:533#
# commandlinefu.com by David Winterbottom

# delete all DrWeb status, failure and other messages on a postfix server
mailq | grep DrWEB | awk {'print $1'} | sed s/*//g | postsuper -d -

# less an message on a postfix mailsystem with a specific message-id
id=<XXXX>; find /var/spool/postfix/ -name $id -exec less {} \;

# Remove all mail in Postfix mail queue.
postsuper -d ALL


#:534#
# commandlinefu.com by David Winterbottom

# Uncompress a CSS file
cat somefile.css | awk '{gsub(/{|}|;/,"&\n"); print}' >> uncompressed.css


#:535#
# commandlinefu.com by David Winterbottom

# Split a tarball into multiple parts
tar cf - <dir>|split -b<max_size>M - <name>.tar.

# Create a simple backup
tar pzcvf /result_path/result.tar.gz /target_path/target_folder

# List contents of tar archive within a compressed 7zip archive
7z x -so testfile.tar.7z | tar tvf -

# Create a tar archive using 7z compression
tar cf - /path/to/data | 7z a -si archivename.tar.7z

# Extract multiple file in a directory
for i in *.tar.gz; do tar -xzf $i; done

# tar per directory
cd <YOUR_DIRECTORY>; for i in `ls ./`; do tar czvf "$i".tar.gz "$i" ; done

# Archive every file in /var/logs
find /var/logs -name * | xargs tar -jcpf logs_`date +%Y-%m-%e`.tar.bz2


#:536#
# commandlinefu.com by David Winterbottom

# Show git branches by date - useful for showing active branches
for k in `git branch|perl -pe s/^..//`;do echo -e `git show --pretty=format:"%Cg
reen%ci %Cblue%cr%Creset" $k|head -n 1`\\t$k;done|sort -r


#:537#
# commandlinefu.com by David Winterbottom

# Convert decimal numbers to binary
function decToBin { echo "ibase=10; obase=2; $1" | bc; }

# Easily decode unix-time (funtion)
utime(){ perl -e "print localtime($1).\"\n\"";}

# Add the sbin directories to your PATH if it doesn't already exist in ZSH.
path+=( /sbin /usr/sbin /usr/local/sbin ); path=( ${(u)path} );

# Postpone a command [zsh]
<alt+q>

# A quick shell command to weed out the small wallpapers
for i in ~/Desktop/Personal/Wallpapers/*.jpg ; { size=$((`identify -format "%wx%
h" $i | sed 's/x/*/'`)) ; if [[ $size -lt 800001 ]] then ; rm -f "$i" ; fi; }

# Changing the terminal title to the last shell command
[[ "x$TERM" == "xrxvt" || "x$XTERM_VERSION" == xXTerm* || "x$COLORTERM" == 'gnom
e-terminal' && "x$SHELL" == */bin/zsh ]] && preexec () { print -Pn "\e]0;$1\a" }

# Changing the terminal title to the last shell command
if [ "$SHELL" = '/bin/zsh' ]; then case $TERM in rxvt|*term|linux) preexec () {
print -Pn "\e]0;$1\a" };; esac; fi

# Show directories in the PATH, one per line
print -l $path

# Verbosely delete files matching specific name pattern, older than 15 days.
rm -vf /backup/directory/**/FILENAME_*(m+15)

# Remove empty directories
rmdir **/*(/^F)

# Delete empty directories with zsh
rm -d **/*(/^F)

# Create a list of binary numbers
echo {0..1}{0..1}{0..1}{0..1}

# See smbstatus all the time
while (( $i != 0 )) { smbstatus; sleep 5; clear }


#:538#
# commandlinefu.com by David Winterbottom

# Resets your MAC to a random MAC address to make you harder to find.
ran=$(head /dev/urandom | md5sum); MAC=00:07:${ran:0:2}:${ran:3:2}:${ran:5:2}:${
ran:7:2}; sudo ifconfig wlan0 down hw ether $MAC; sudo ifconfig wlan0 up; echo i
fconfig wlan0:0

# Changing tha mac adresse
sudo ifconfig eth0 hw ether 00:01:02:03:04:05


#:539#
# commandlinefu.com by David Winterbottom

# Synchronize both your system clock and hardware clock and calculate/adjust tim
e drift
ntpdate pool.ntp.org && hwclock --systohc && hwclock --adjust


#:540#
# commandlinefu.com by David Winterbottom

# Binary Clock
watch -n 1 'echo "obase=2;`date +%s`" | bc'

# Synchronize both your system clock and hardware clock and calculate/adjust tim
e drift
ntpdate pool.ntp.org && hwclock --systohc && hwclock --adjust


#:541#
# commandlinefu.com by David Winterbottom

# change exif data in all jpeg's
for f in *.jpg; do exif --ifd=0 --tag=0x0110 --set-value="LOMO LC-A" --output=$f
 $f; exif --ifd=0 --tag=0x010f --set-value="LOMO" --output=$f $f;       done }


#:542#
# commandlinefu.com by David Winterbottom

# Get names of files in /dev, a USB device is attached to
ls -la /dev/disk/by-id/usb-*

# Remove the boot loader from a usb stick
dd if=/dev/zero of=/dev/sdb bs=446 count=1


#:543#
# commandlinefu.com by David Winterbottom

# find files larger than 1 GB, everywhere
find / -type f -size +1000000000c

# Another way to calculate sum size of all files matching a pattern
find . -iname '*.jar' | xargs du -ks | cut -f1 | xargs echo | sed "s/ /+/g" | bc


#:544#
# commandlinefu.com by David Winterbottom

# Find jpeg images and copy them to a central location
find . -iname "*.jpg" -print0 | tr '[A-Z]' '[a-z]' | xargs -0 cp --backup=number
ed -dp -u --target-directory {location} &

# Copy all documents PDF in disk for your home directory
find / -name "*.pdf" -exec cp -t ~/Documents/PDF {} +

# Copy all documents PDF in disk for your home directory
for i in `find / -name *.pdf`; do cp -v $i $HOME; done


#:545#
# commandlinefu.com by David Winterbottom

# Remove an unnecessary suffix from a file name for all files in a directory
for f in $(ls *.xml.skippy); do mv $f `echo $f | sed 's|.skippy||'`; done

# Command to build one or more network segments - with for
seg() { for b in $(echo $1); do for x in $(seq 10); do echo $b.$x; done; done }

# Command to build one or more network segments - with while
seg() { echo -e "$1" | while read LINE; do for b in $(seq 10); do echo $LINE.$b;
 done; done; }

# download all the presentations from UTOSC2009
b="http://2009.utosc.com"; for p in $( curl -s $b/presentation/schedule/ | grep
/presentation/[0-9]*/ | cut -d"\"" -f2 ); do f=$(curl -s $b$p | grep "/static/sl
ides/" | cut -d"\"" -f4); if [ -n "$f" ]; then echo $b$f; curl -O $b$f; fi done

# Notify Gnome user of files modified today
OLDIFS=$IFS; IFS=$(echo -en "\n\b"); for f in `find -daystart -mtime 0 -type f -
printf "%f\n"`; do notify-send -t 0 "$f downloaded" ; done; IFS=$OLDIFS

# Adding Color Escape Codes to global CC array for use by echo -e
declare -ax CC; for i in `seq 0 7`;do ii=$(($i+7)); CC[$i]="\033[1;3${i}m"; CC[$
ii]="\033[0;3${i}m"; done

# Show only existing executable dirs in PATH using only builtin bash commands
for p in ${PATH//:/ }; do [[ -d $p && -x $p ]] && echo $p; done

# search for a file in PATH
type <filename>

# search for a file in PATH
which <filename>

# search for a file in PATH
for L in `echo :$PATH | tr : '\n'`; do F=${L:-"."}/fileName; if [ -f ${F} -o -h
${F} ]; then echo ${F}; break; fi; done

# Convert ogg to mp3
for x in *.ogg; do ffmpeg -i "$x" "`basename "$x" .ogg`.mp3"; done

# List all groups and the user names that were in each group
for u in `cut -f1 -d: /etc/passwd`; do echo -n $u:; groups $u; done | sort

# Copy all documents PDF in disk for your home directory
find / -name "*.pdf" -exec cp -t ~/Documents/PDF {} +

# Batch image resize
for a in `ls`; do echo $a && convert $a -resize <Width>x<Height> $a; done

# IFS - use entire lines in your for cycles
export IFS=$(echo -e "\n")

# Copy all documents PDF in disk for your home directory
for i in `find / -name *.pdf`; do cp -v $i $HOME; done


#:546#
# commandlinefu.com by David Winterbottom

# Ultimate current directory usage command
ncdu

# ncdu - ncurses disk usage
ncdu directory_name


#:547#
# commandlinefu.com by David Winterbottom

# Ultimate current directory usage command
ncdu

# ncdu - ncurses disk usage
ncdu directory_name


#:548#
# commandlinefu.com by David Winterbottom

# Analyse compressed Apache access logs for the most commonly requested pages
zcat access_log.*.gz | awk '{print $7}' | sort | uniq -c | sort -n | tail -n 20

# Determine what an process is actually doing
sudo strace -pXXXX -e trace=file

# benchmark web server with apache benchmarking tool
ab -n 9000 -c 900 localhost:8080/index.php

# List apache2 virtualhosts
/usr/sbin/apache2ctl -S 2>&1 | perl -ne 'm@.*port\s+([0-9]+)\s+\w+\s+(\S+)\s+\((
.+):.*@ && do { print "$2:$1\n\t$3\n"; $root = qx{grep DocumentRoot $3}; $root =
~ s/^\s+//; print "\t$root\n" };'

# Know which modules are loaded on an Apache server
apache2 -t -D DUMP_MODULES


#:549#
# commandlinefu.com by David Winterbottom

# Checks apache's access_log file, strips the search queries and shoves them up
your e-mail
awk '/q=/{print $11}' /var/log/httpd/access_log.4 | awk -F 'q=' '{print $2}' | s
ed 's/+/ /g;s/%22/"/g;s/q=//' | cut -d "&" -f 1

# Checks apache's access_log file, strips the search queries and shoves them up
your e-mail
cat /var/log/httpd/access_log | grep q= | awk '{print $11}' | awk -F 'q=' '{prin
t $2}' | sed 's/+/ /g;s/%22/"/g;s/q=//' | cut -d "&" -f 1 | mail youremail@isp.c
om -s "[your-site] search strings for `date`"

# Know which modules are loaded on an Apache server
apache2 -t -D DUMP_MODULES


#:550#
# commandlinefu.com by David Winterbottom

# Hiding and Show files on Mac OS X
setfile -a V foo.bar; setfile -a v foo.bar;

# Open Finder from the current Terminal location
open .


#:551#
# commandlinefu.com by David Winterbottom

# For a $FILE, extracts the path, filename, filename without extension and exten
sion.
FILENAME=`echo ${FILE##*/}`;FILEPATH=`echo ${FILE%/*}`;NOEXT=`echo ${FILENAME%\.
*}`;EXT=`echo ${FILE##*.}`


#:552#
# commandlinefu.com by David Winterbottom

# Write and run a quick C program
cat | gcc -x c -o a.out - && ./a.out && rm a.out

# Create a directory and change into it at the same time
md () { mkdir -p "$@" && cd "$@"; }

# Search back through previous commands
Ctrl-R <search-text>

# Go to parent directory of filename edited in last command
cd `dirname $_`

# Go to parent directory of filename edited in last command
cd !$:h

# Count to 65535 in binary (for no apparent reason)
a=`printf "%*s" 16`;b=${a//?/{0..1\}}; echo `eval "echo $b"`

# For a $FILE, extracts the path, filename, filename without extension and exten
sion.
FILENAME=`echo ${FILE##*/}`;FILEPATH=`echo ${FILE%/*}`;NOEXT=`echo ${FILENAME%\.
*}`;EXT=`echo ${FILE##*.}`


#:553#
# commandlinefu.com by David Winterbottom

# For a $FILE, extracts the path, filename, filename without extension and exten
sion.
FILENAME=`echo ${FILE##*/}`;FILEPATH=`echo ${FILE%/*}`;NOEXT=`echo ${FILENAME%\.
*}`;EXT=`echo ${FILE##*.}`


#:554#
# commandlinefu.com by David Winterbottom

# Colored diff ( via vim ) on 2 remotes files on your local computer.
vimdiff scp://root@server-foo.com//etc/snmp/snmpd.conf scp://root@server-bar.com
//etc/snmp/snmpd.conf

# scp a good script from host A which has no public access to host C, but with a
 hop by host B
ssh middlehost "ssh -a root@securehost '> nicescript'" < nicescript

# scp a good script from host A which has no public access to host C, but with a
 hop by host B
cat nicescript |ssh middlehost "cat | ssh -a root@securehost 'cat > nicescript'"

# Easily scp a file back to the host you're connecting from
mecp () { scp "$@" ${SSH_CLIENT%% *}:Desktop/; }


#:555#
# commandlinefu.com by David Winterbottom

# Pipe the result of a command to IRC (channel or query)
function my_irc { tmp=`mktemp`; cat > $tmp; { echo -e "USER $username x x :$ircn
ame\nNICK $nick\nJOIN $target"; while read line; do echo -e "PRIVMSG $target :$l
ine"; done < $tmp; } | nc $server > /dev/null ; rm $tmp; }


#:556#
# commandlinefu.com by David Winterbottom

# determine if tcp port is open
nmap -p 80 hostname

# determine if tcp port is open
nc -zw2 www.example.com 80 && echo open

# determine if tcp port is open
if (nc -zw2 www.example.com 80); then echo open; fi

# Port scan a range of hosts with Netcat.
for i in {21..29}; do nc -v -n -z -w 1 192.168.0.$i 443; done

# Get Futurama quotations from slashdot.org servers
echo -e "HEAD / HTTP/1.1\nHost: slashdot.org\n\n" | nc slashdot.org 80 | head -n
5 | tail -1 | cut -f2 -d-

# Using netcat to copy files between servers
On target: "nc -l 4000 | tar xvf -" On source: "tar -cf - . | nc target_ip 4000"

# Pipe the result of a command to IRC (channel or query)
function my_irc { tmp=`mktemp`; cat > $tmp; { echo -e "USER $username x x :$ircn
ame\nNICK $nick\nJOIN $target"; while read line; do echo -e "PRIVMSG $target :$l
ine"; done < $tmp; } | nc $server > /dev/null ; rm $tmp; }


#:557#
# commandlinefu.com by David Winterbottom

# Convert "man page" to text file
man ls | col -b > ~/Desktop/man_ls.txt


#:558#
# commandlinefu.com by David Winterbottom

# Twit Amarok "now playing" song
curl -u <user>:<password> -d status="Amarok, now playing: $(dcop amarok default
nowPlaying)" http://twitter.com/statuses/update.json


#:559#
# commandlinefu.com by David Winterbottom

# See non printable caracters like tabulations, CRLF, LF line terminators ( colo
red )
od -c <FILE> | grep --color '\\.'

# Outputs a 10-digit random number
n=$RANDOM$RANDOM$RANDOM; let "n %= 10000000000"; echo $n

# Outputs a 10-digit random number
echo $RANDOM$RANDOM$RANDOM |cut -c3-12

# Outputs a 10-digit random number
head -c4 /dev/urandom | od -N4 -tu4 | sed -ne '1s/.* //p'

# urlencode
(Command too long..See sample Output..)


#:560#
# commandlinefu.com by David Winterbottom

# Inserts the results of an autocompletion in the command line
ESC *


#:561#
# commandlinefu.com by David Winterbottom

# Use FileMerge to compare two files
opendiff <file1> <file2>


#:562#
# commandlinefu.com by David Winterbottom

# find out how much space are occuipied by files smaller than 1024K (sic) - impr
oved
find dir -size -1024k -type f -print0 | du --files0-from - -bc

# find out how much space are occuipied by files smaller than 1024K
find dir -size -1024k -type f | xargs -d $'\n' -n1 ls -l | cut -d ' ' -f 5  | se
d -e '2,$s/$/+/' -e '$ap' | dc

# Sum of the total resident memory Stainless.app is using.
ps -ec -o command,rss | grep Stainless | awk -F ' ' '{ x = x + $2 } END { print
x/(1024) " MB."}'

# Sum columns from CSV column $COL
perl -F',' -ane '$a += $F[3]; END { print $a }' test.csv

# Sum columns from CSV column $COL
awk -F ',' '{ x = x + $4 } END { print x }' test.csv

# Sum columns from CSV column $COL
perl  -ne 'split /,/ ; $a+= $_[3]; END {print $a."\n";}' -f ./file.csv

# Do quick arithmetic on numbers from STDIN with any formatting using a perl one
 liner.
perl -ne '$sum += $_ for grep { /\d+/ } split /[^\d\-\.]+/; print "$sum\n"'


#:563#
# commandlinefu.com by David Winterbottom

# Do quick arithmetic on numbers from STDIN with any formatting using a perl one
 liner.
perl -ne '$sum += $_ for grep { /\d+/ } split /[^\d\-\.]+/; print "$sum\n"'


#:564#
# commandlinefu.com by David Winterbottom

# Do quick arithmetic on numbers from STDIN with any formatting using a perl one
 liner.
perl -ne '$sum += $_ for grep { /\d+/ } split /[^\d\-\.]+/; print "$sum\n"'


#:565#
# commandlinefu.com by David Winterbottom

# Do quick arithmetic on numbers from STDIN with any formatting using a perl one
 liner.
perl -ne '$sum += $_ for grep { /\d+/ } split /[^\d\-\.]+/; print "$sum\n"'


#:566#
# commandlinefu.com by David Winterbottom

# count how many times a string appears in a (source code) tree
$ grep -or string path/ | wc -l

# count how many times a string appears in a (source code) tree
grep -rc logged_in app/ | cut -d : -f 2 | awk '{sum+=$1} END {print sum}'

# Do quick arithmetic on numbers from STDIN with any formatting using a perl one
 liner.
perl -ne '$sum += $_ for grep { /\d+/ } split /[^\d\-\.]+/; print "$sum\n"'


#:567#
# commandlinefu.com by David Winterbottom

# Check if variable is a number
if [ "$testnum" -eq "$testnum" 2>/dev/null ]; then echo It is numeric; fi

# Do quick arithmetic on numbers from STDIN with any formatting using a perl one
 liner.
perl -ne '$sum += $_ for grep { /\d+/ } split /[^\d\-\.]+/; print "$sum\n"'


#:568#
# commandlinefu.com by David Winterbottom


#:569#
# commandlinefu.com by David Winterbottom

# Print text string vertically, one character per line.
echo "vertical text" | fold -1

# Print text string vertically, one character per line.
echo "vertical text" | grep -o '.'

# Merges given files line by line
paste -d ',:' file1 file2 file3


#:570#
# commandlinefu.com by David Winterbottom

# Get absolut path to your bash-script
script_path=$(cd $(dirname $0);pwd)


#:571#
# commandlinefu.com by David Winterbottom

# Extract the daily average number of iops
for x in `seq -w 1 30`; do sar -b -f /var/log/sa/sa$x | gawk '/Average/ {print $
2}'; done


#:572#
# commandlinefu.com by David Winterbottom

# Typing the current date ( or any string ) via a shortcut as if the keys had be
en actually typed with the hardware keyboard in any application.
xvkbd -xsendevent -text $(date +%Y%m%d)

# get xclip to own the clipboard contents
xclip -o -selection clipboard | xclip -selection clipboard

# Paste OS X clipboard contents to a file on a remote machine
pbpaste | ssh user@hostname 'cat > ~/my_new_file.txt'

# cat large file to clipboard with speed-o-meter
pv large.xml | xclip

# pipe output of a command to your clipboard
some command|xsel --clipboard

# Paste the contents of OS X clipboard into a new text file
pbpaste > newfile.txt


#:573#
# commandlinefu.com by David Winterbottom

# Use QuickLook from the command line without verbose output
qlook() { qlmanage -p "$@" >& /dev/null & }


#:574#
# commandlinefu.com by David Winterbottom

# Create a random file of a specific size
dd if=/dev/zero of=testfile.txt bs=1M count=10


#:575#
# commandlinefu.com by David Winterbottom

# get newest jpg picture in a folder
cp `ls -x1tr *.jpg | tail -n 1` newest.jpg


#:576#
# commandlinefu.com by David Winterbottom

# Instant mirror from your laptop + webcam (fullscreen+grab)
mplayer -fs -vf screenshot,mirror tv://

# Instant mirror from your laptop + webcam
mplayer tv:// -vf mirror

# View webcam output using GStreamer pipeline
gst-launch-0.10 autovideosrc ! video/x-raw-yuv,framerate=\(fraction\)30/1,width=
640,height=480 ! ffmpegcolorspace ! autovideosink

# Record audio and video from webcam using mencoder
mencoder tv:// -tv driver=v4l2:width=800:height=600:device=/dev/video0:fps=30:ou
tfmt=yuy2:forceaudio:alsa:adevice=hw.2,0 -ovc lavc -lavcopts vcodec=mpeg4:vbitra
te=1800 -ffourcc xvid -oac mp3lame -lameopts cbr=128 -o output.avi

# View webcam output using mplayer
mplayer tv:// -tv driver=v4l2:width=640:height=480:device=/dev/video0:fps=30:out
fmt=yuy2

# Record audio and video from webcam using ffmpeg
ffmpeg -f alsa -r 16000 -i hw:2,0 -f video4linux2 -s 800x600 -i /dev/video0 -r 3
0 -f avi -vcodec mpeg4 -vtag xvid -sameq -acodec libmp3lame -ab 96k output.avi

# Record a webcam output into a video file.
ffmpeg -an -f video4linux -s 320x240 -b 800k -r 15 -i /dev/v4l/video0 -vcodec mp
eg4 myvideo.avi

# get newest jpg picture in a folder
cp `ls -x1tr *.jpg | tail -n 1` newest.jpg


#:577#
# commandlinefu.com by David Winterbottom

# Match non-empty lines
grep -v "^\W$" <filename>


#:578#
# commandlinefu.com by David Winterbottom

# Redirect incoming traffic to SSH, from a port of your choosing
iptables -t nat -A PREROUTING -p tcp --dport [port of your choosing] -j REDIRECT
 --to-ports 22


#:579#
# commandlinefu.com by David Winterbottom

# Redirect incoming traffic to SSH, from a port of your choosing
iptables -t nat -A PREROUTING -p tcp --dport [port of your choosing] -j REDIRECT
 --to-ports 22


#:580#
# commandlinefu.com by David Winterbottom

# Using gdiff only select lines that are common between two files
gdiff --unified=10000 input.file1 inpute.file2 | egrep -v "(^\+[a-z]|^\-[a-z])"|
 sort > outputfile.sorted


#:581#
# commandlinefu.com by David Winterbottom

# Using gdiff only select lines that are common between two files
gdiff --unified=10000 input.file1 inpute.file2 | egrep -v "(^\+[a-z]|^\-[a-z])"|
 sort > outputfile.sorted


#:582#
# commandlinefu.com by David Winterbottom

# purge installed but unused linux headers, image, or modules
dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed "s/\(.*\)-\([^0-9]\+\)/\1/"
)"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d' | xargs sudo apt-get -y purge


#:583#
# commandlinefu.com by David Winterbottom

# How to watch files
watch -d 'ls -l'

# Watching Command
watch 'cat /proc/loadavg'

# watch iptables counters
watch --interval 0 'iptables -nvL | grep -v "0     0"'

# Get a regular updated list of zombies
watch "ps auxw | grep [d]efunct"

# Get a regular updated list of zombies
watch "ps auxw | grep 'defunct' | grep -v 'grep' | grep -v 'watch'"

# Follow the most recently updated log files
ls -drt /var/log/* | tail -n5 | xargs sudo tail -n0 -f

# Display a cool clock on your terminal
watch -t -n1 "date +%T|figlet"


#:584#
# commandlinefu.com by David Winterbottom

# Get lines count of a list of files
find . -name "*.sql" -print0 | wc -l --files0-from=-


#:585#
# commandlinefu.com by David Winterbottom

# Update your OpenDNS network ip
wget -q --user=<username> --password=<password> 'https://updates.opendns.com/nic
/update?hostname=your_opendns_hostname&myip=your_ip' -O -


#:586#
# commandlinefu.com by David Winterbottom

# Update your OpenDNS network ip
wget -q --user=<username> --password=<password> 'https://updates.opendns.com/nic
/update?hostname=your_opendns_hostname&myip=your_ip' -O -


#:587#
# commandlinefu.com by David Winterbottom

# Convert decimal numbers to binary
function decToBin { echo "ibase=10; obase=2; $1" | bc; }

# Function to output an ASCII character given its decimal equivalent
chr () { echo -en "\0$(printf %x $1)"}

# Function to output an ASCII character given its decimal equivalent
chr() { printf \\$(printf %o $1); }

# Function to output an ASCII character given its decimal equivalent
chr () { printf \\$(($1/64*100+$1%64/8*10+$1%8)); }

# Create a list of binary numbers
echo {0..1}{0..1}{0..1}{0..1}


#:588#
# commandlinefu.com by David Winterbottom

# Convert decimal numbers to binary
function decToBin { echo "ibase=10; obase=2; $1" | bc; }

# Adding Color Escape Codes to global CC array for use by echo -e
declare -ax CC; for i in `seq 0 7`;do ii=$(($i+7)); CC[$i]="\033[1;3${i}m"; CC[$
ii]="\033[0;3${i}m"; done

# Create a list of binary numbers
echo {0..1}{0..1}{0..1}{0..1}


#:589#
# commandlinefu.com by David Winterbottom

# Migrate existing Ext3 filesystems to Ext4
tune2fs -O extents,uninit_bg,dir_index /dev/yourpartition


#:590#
# commandlinefu.com by David Winterbottom

# Migrate existing Ext3 filesystems to Ext4
tune2fs -O extents,uninit_bg,dir_index /dev/yourpartition


#:591#
# commandlinefu.com by David Winterbottom

# Set an alarm to wake up [2]
echo "aplay path/to/song" |at [time]


#:592#
# commandlinefu.com by David Winterbottom

# Function that outputs dots every second until command completes
sleeper(){ while `ps -p $1 &>/dev/null`; do echo -n "${2:-.}"; sleep ${3:-1}; do
ne; }; export -f sleeper

# Force hard reset on server
echo 1 > /proc/sys/kernel/sysrq; echo b > /proc/sysrq-trigger

# Find removed files still in use via /proc
find -L /proc/*/fd -links 0 2>/dev/null


#:593#
# commandlinefu.com by David Winterbottom

# Fill up disk space (for testing)
tail $0 >> $0

# Fill up disk space (for testing)
dd if=/dev/zero of=/fs/to/fill/dummy00 bs=8192 count=$(df --block-size=8192 / |
awk 'NR!=1 {print $4-100}')

# Find removed files still in use via /proc
find -L /proc/*/fd -links 0 2>/dev/null


#:594#
# commandlinefu.com by David Winterbottom


#:595#
# commandlinefu.com by David Winterbottom

# replace spaces in filenames with underscores
rename 'y/ /_/' *


#:596#
# commandlinefu.com by David Winterbottom

# floating point shell calculator
calc() { awk 'BEGIN { OFMT="%f"; print '"$*"'; exit}'; }

# floating point bash calculator w/o precision
b(){ echo "scale=${2:-2}; $1" | bc -l; }

# Define a quick calculator function
? () { echo "$*" | bc -l; }


#:597#
# commandlinefu.com by David Winterbottom

# Define a quick calculator function
? () { echo "$*" | bc -l; }


#:598#
# commandlinefu.com by David Winterbottom

# Check if filesystem hangs
ls /mnt/badfs &


#:599#
# commandlinefu.com by David Winterbottom

# Check if filesystem hangs
ls /mnt/badfs &


#:600#
# commandlinefu.com by David Winterbottom

# Recursive when needed
rm strangedirs -rf


#:601#
# commandlinefu.com by David Winterbottom

# Back up a PLESK Installation
/opt/psa/bin/pleskbackup server -v --output-file=plesk_server.bak


#:602#
# commandlinefu.com by David Winterbottom

# throttle bandwidth with cstream
tar -cj /backup | cstream -t 777k | ssh host 'tar -xj -C /backup'


#:603#
# commandlinefu.com by David Winterbottom

# throttle bandwidth with cstream
tar -cj /backup | cstream -t 777k | ssh host 'tar -xj -C /backup'


#:604#
# commandlinefu.com by David Winterbottom

# Print a great grey scale demo !
yes "$(seq 232 255;seq 254 -1 233)" | while read i; do printf "\x1b[48;5;${i}m\n
"; sleep .01; done


#:605#
# commandlinefu.com by David Winterbottom

# Shows how many percents of all avaliable packages are installed in your gentoo
 system
echo $((`eix --only-names -I | wc -l` * 100 / `eix --only-names | wc -l`))%

# Resume an emerge, and keep all object files that are already built
FEATURES=keepwork emerge --resume


#:606#
# commandlinefu.com by David Winterbottom

# Resume an emerge, and keep all object files that are already built
FEATURES=keepwork emerge --resume


#:607#
# commandlinefu.com by David Winterbottom

# Check if you need to run LaTeX more times to get the refefences right
egrep "(There were undefined references|Rerun to get (cross-references|the bars)
 right)" texfile.log


#:608#
# commandlinefu.com by David Winterbottom

# pipe output of a command to your clipboard
some command|xsel --clipboard


#:609#
# commandlinefu.com by David Winterbottom

# live ssh network throughput test
pv /dev/zero|ssh $host 'cat > /dev/null'

# live ssh network throughput test
yes | pv | ssh $host "cat > /dev/null"

# copy working directory and compress it on-the-fly while showing progress
tar -cf - . | pv -s $(du -sb . | awk '{print $1}') | gzip > out.tgz

# Duplicate a directory tree using tar and pipes
(cd /source/dir ; tar cv .)|(cd /dest/dir ; tar xv)

# cat large file to clipboard with speed-o-meter
pv large.xml | xclip


#:610#
# commandlinefu.com by David Winterbottom

# get xclip to own the clipboard contents
xclip -o -selection clipboard | xclip -selection clipboard

# encode image to base64 and copy to clipboard
uuencode -m $1 /dev/stdout | sed '1d' | sed '$d' | tr -d '\n' | xclip -selection
 clipboard

# preprocess code to be posted in comments on this site
sed 's/^/$ /' "$script" | xclip

# cat large file to clipboard with speed-o-meter
pv large.xml | xclip


#:611#
# commandlinefu.com by David Winterbottom

# backup all your commandlinefu.com favourites to a plaintext file
clfavs(){ URL="http://www.commandlinefu.com";wget -O - --save-cookies c --post-d
ata "username=$1&password=$2&submit=Let+me+in" $URL/users/signin;for i in `seq 0
 25 $3`;do wget -O - --load-cookies c $URL/commands/favourites/plaintext/$i >>$4
;done;rm -f c;}

# Log a command's votes
while true; do curl -s http://www.commandlinefu.com/commands/view/3643/log-a-com
mands-votes | grep 'id="num-votes-' | sed 's;.*id="num-votes-[0-9]*">\([0-9\-]*\
)</div>;\1;' >> votes; sleep 10; done

# Get ethernet card information.
ethtool eth0

# Get the information about the internet usage from the commandline.
vnstat

# Search commandlinefu.com from the command line using the API
cmdfu(){ curl "http://www.commandlinefu.com/commands/matching/$@/$(echo -n $@ |
openssl base64)/plaintext"; }

# print latest (top 10, top 3 or *) commandlinefu.com commands
wget -qO - http://www.commandlinefu.com/feed/tenup | xmlstarlet sel -T -t -o '&l
t;x&gt;' -n -t -m rss/channel/item -o '&lt;y&gt;' -n -v description -o '&lt;/y&g
t;' -n -t -o '&lt;/x&gt;' | xmlstarlet sel -T -t -m x/y -v code -n

# back up your commandlinefu contributed commands
curl http://www.commandlinefu.com/commands/by/<your username>/rss|gzip ->command
linefu-contribs-backup-$(date +%Y-%m-%d-%H.%M.%S).rss.gz

# Search commandlinefu from the command line
(curl -d q=grep http://www.commandlinefu.com/search/autocomplete) | egrep 'autoc
omplete|votes|destination' | perl -pi -e 's/a style="display:none" class="destin
ation" href="//g;s/<[^>]*>//g;s/">$/\n\n/g;s/^ +//g;s/^\//http:\/\/commandlinefu
.com\//g'


#:612#
# commandlinefu.com by David Winterbottom

# ignore hidden directory in bash completion (e.g.  .svn)
Add to ~/.inputrc: set match-hidden-files off

# ignore hidden directory in bash completion (e.g.  .svn)
bind 'set match-hidden-files off'


#:613#
# commandlinefu.com by David Winterbottom

# Scan computers OS and open services on all network
nmap -O 192.168.1.1/24


#:614#
# commandlinefu.com by David Winterbottom

# Scan computers OS and open services on all network
nmap -O 192.168.1.1/24


#:615#
# commandlinefu.com by David Winterbottom

# Functions to display, save and restore $IFS
ifs () { echo -n "${IFS}"|hexdump -e '""  10/1 "'\''%_c'\''\t" "\n"' -e '"" 10/1
 "0x%02x\t" "\n\n"'|sed "s/''\|\t0x[^0-9]//g; $,/^$/d"

# Notify Gnome user of files modified today
OLDIFS=$IFS; IFS=$(echo -en "\n\b"); for f in `find -daystart -mtime 0 -type f -
printf "%f\n"`; do notify-send -t 0 "$f downloaded" ; done; IFS=$OLDIFS

# IFS - use entire lines in your for cycles
export IFS=$(echo -e "\n")


#:616#
# commandlinefu.com by David Winterbottom

# Printing multiple years with Unix cal command
for y in $(seq 2009 2011); do cal $y; done


#:617#
# commandlinefu.com by David Winterbottom

# Outputs files with ascii art in the intended form.
iconv -f437 -tutf8 asciiart.nfo


#:618#
# commandlinefu.com by David Winterbottom

# Outputs files with ascii art in the intended form.
iconv -f437 -tutf8 asciiart.nfo


#:619#
# commandlinefu.com by David Winterbottom

# Show only existing executable dirs in PATH using only builtin bash commands
for p in ${PATH//:/ }; do [[ -d $p && -x $p ]] && echo $p; done

# Test if the given argument is a valid ip address.
perl -e '$p=qr!(?:0|1\d{0,2}|2(?:[0-4]\d?|5[0-5]?|[6-9])?|[3-9]\d?)!;print((shif
t=~m/^$p\.$p\.$p\.$p$/)?1:0);' 123.123.123.123


#:620#
# commandlinefu.com by David Winterbottom

# Test if the given argument is a valid ip address.
perl -e '$p=qr!(?:0|1\d{0,2}|2(?:[0-4]\d?|5[0-5]?|[6-9])?|[3-9]\d?)!;print((shif
t=~m/^$p\.$p\.$p\.$p$/)?1:0);' 123.123.123.123


#:621#
# commandlinefu.com by David Winterbottom

# kill  some process (same as others) but  parsing to a variable
pkill -9 -f program


#:622#
# commandlinefu.com by David Winterbottom

# Carriage return for reprinting on the same line
while true; do echo -ne "$(date)\r"; sleep 1; done

# Watch number of lines being processed on a clear screen
cat /dev/urandom|awk 'BEGIN{"tput cuu1" | getline CursorUp; "tput clear" | getli
ne Clear; printf Clear}{num+=1;printf CursorUp; print num}'


#:623#
# commandlinefu.com by David Winterbottom

# Know when you will type :q in your term instead of vi(m), the alias will chewe
d you out.
alias :q='tput setaf 1; echo >&2 "this is NOT vi(m) :/"; tput sgr0'

# Watch number of lines being processed on a clear screen
cat /dev/urandom|awk 'BEGIN{"tput cuu1" | getline CursorUp; "tput clear" | getli
ne Clear; printf Clear}{num+=1;printf CursorUp; print num}'


#:624#
# commandlinefu.com by David Winterbottom

# Fast grepping (avoiding UTF overhead)
export LANG=C; grep string longBigFile.log


#:625#
# commandlinefu.com by David Winterbottom

# Split a tarball into multiple parts
tar cf - <dir>|split -b<max_size>M - <name>.tar.

# Unarchive entire folder
for f in *;do case "$(echo $f|sed "s/.*\.\([a-z\.]*\)/\1/g")" in zip)unzip -qqo
$f&&rm $f;;tar.gz|tar.bz2)tar xf $f&&rm $f;;rar)unrar e -o+ -r -y $f&&rm $f;;7z)
7z e -qqo $f;;esac;done

# List contents of tar archive within a compressed 7zip archive
7z x -so testfile.tar.7z | tar tvf -

# Create a tar archive using 7z compression
tar cf - /path/to/data | 7z a -si archivename.tar.7z


#:626#
# commandlinefu.com by David Winterbottom

# Create a tar archive using 7z compression
tar cf - /path/to/data | 7z a -si archivename.tar.7z


#:627#
# commandlinefu.com by David Winterbottom

# List contents of tar archive within a compressed 7zip archive
7z x -so testfile.tar.7z | tar tvf -

# Create a tar archive using 7z compression
tar cf - /path/to/data | 7z a -si archivename.tar.7z


#:628#
# commandlinefu.com by David Winterbottom

# Create a zip file ignoring .svn files
zip -r foo.zip DIR -x "*/.svn/*"

# Create a zip file ignoring .svn files
find . -not \( -name .svn -prune \) -type f | xargs zip XXXXX.zip

# Create a tar archive using 7z compression
tar cf - /path/to/data | 7z a -si archivename.tar.7z


#:629#
# commandlinefu.com by David Winterbottom

# Create a tar archive using 7z compression
tar cf - /path/to/data | 7z a -si archivename.tar.7z


#:630#
# commandlinefu.com by David Winterbottom

# monitor network traffic and throughput in real time
iptraf

# Test network performance, copying from the mem of one box, over the net to the
 mem of another
dd if=/dev/zero bs=256M count=1 | nc [remoteIP] [remotePort] and on the other ho
st nc -l port >/dev/null


#:631#
# commandlinefu.com by David Winterbottom

# Create a file list of all package files installed on your Red-Hat-like system
for easy grepping
for i in `rpm -qva | sort ` ; do ; echo "===== $i =====" ; rpm -qvl $i ; done >
/tmp/pkgdetails


#:632#
# commandlinefu.com by David Winterbottom

# Duplicate a directory tree using tar and pipes
(cd /source/dir ; tar cv .)|(cd /dest/dir ; tar xv)

# Duplicate a directory tree using tar and pipes
(cd /source/dir ; tar cvf - .)|(cd /dest/dir ; tar xvpf -)


#:633#
# commandlinefu.com by David Winterbottom

# Duplicate a directory tree using tar and pipes
(cd /source/dir ; tar cv .)|(cd /dest/dir ; tar xv)

# Duplicate a directory tree using tar and pipes
(cd /source/dir ; tar cvf - .)|(cd /dest/dir ; tar xvpf -)


#:634#
# commandlinefu.com by David Winterbottom

# Send Reminders from your Linux Server to Growl on a Mac
remind -z1 -k'echo %s |ssh <user>@<host> "growlnotify"' ~/.reminders &


#:635#
# commandlinefu.com by David Winterbottom

# Send Reminders from your Linux Server to Growl on a Mac
remind -z1 -k'echo %s |ssh <user>@<host> "growlnotify"' ~/.reminders &


#:636#
# commandlinefu.com by David Winterbottom

# Run gunzipped sql file in PostGres, adding to the library since I couldnt find
 this command anywhere else on the web.
gzip -dc /tmp/pavanlimo.gz | psql -U user db


#:637#
# commandlinefu.com by David Winterbottom


#:638#
# commandlinefu.com by David Winterbottom

# Kill a process with its name
pkill $1


#:639#
# commandlinefu.com by David Winterbottom

# Kill a process with its name
pkill $1


#:640#
# commandlinefu.com by David Winterbottom

# Pause and Resume Processes
stop () { ps -ec | grep $@ | kill -SIGSTOP `awk '{print $1}'`; }

# Return threads count of a process
ps -o thcount -p <process id>

# Output Detailed Process Tree for any User
psu(){ command ps -Hcl -F S f -u ${1:-$USER}; }

# Schedule Nice Background Commands That Won't Die on Logout - Alternative to no
hup and at
( trap '' 1; ( nice -n 19 sleep 2h && command rm -v -rf /garbage/ &>/dev/null &&
 trap 1 ) & )

# Print text string vertically, one character per line.
echo "vertical text" | fold -1

# Function that outputs dots every second until command completes
sleeper(){ while `ps -p $1 &>/dev/null`; do echo -n "${2:-.}"; sleep ${3:-1}; do
ne; }; export -f sleeper

# Print text string vertically, one character per line.
echo "vertical text" | grep -o '.'

# Will email user@example.com when all Rsync processes have finished.
$(while [ ! -z "$(pgrep rsync)" ]; do echo; done; echo "rsync done" | mailx user
@example.com) > /dev/null &

# View open file descriptors for a process.
lsof -p <process_id> | wc -l

# Kill a process with its name
pkill $1

# Click on a GUI window and show its process ID and command used to run the proc
ess
xprop | awk '/PID/ {print $3}' | xargs ps h -o pid,cmd


#:641#
# commandlinefu.com by David Winterbottom

# Create more threads with less stack space
ulimit -s 64


#:642#
# commandlinefu.com by David Winterbottom

# To find how Apache has been compiled from commandline
httpd2 -V

# Get the information about the Apache loaded modules from command line
httpd2 -M

# List apache2 virtualhosts
/usr/sbin/apache2ctl -S 2>&1 | perl -ne 'm@.*port\s+([0-9]+)\s+\w+\s+(\S+)\s+\((
.+):.*@ && do { print "$2:$1\n\t$3\n"; $root = qx{grep DocumentRoot $3}; $root =
~ s/^\s+//; print "\t$root\n" };'


#:643#
# commandlinefu.com by David Winterbottom


#:644#
# commandlinefu.com by David Winterbottom

# Provides external IP, Country and City in a formated manner.
geoip () {  curl -s "http://www.geoiptool.com/?IP=$1" | html2text | egrep --colo
r 'City:|IP Address:|Country:' }

# geoip information
geoiplookup www.commandlinefu.com

# geoip information
geo(){ curl -s "http://www.geody.com/geoip.php?ip=$(dig +short $1)"| sed '/^IP:/
!d;s/<[^>][^>]*>//g'; }

# find geographical location of an ip address
lynx -dump http://www.ip-adress.com/ip_tracer/?QRY=$1|sed -nr s/'^.*My IP addres
s city: (.+)$/\1/p'


#:645#
# commandlinefu.com by David Winterbottom

# Open windows executable, file, or folder from cygwin terminal
explorer $( cygpath "/path/to/file_or_exe" -w )


#:646#
# commandlinefu.com by David Winterbottom

# Open windows executable, file, or folder from cygwin terminal
explorer $( cygpath "/path/to/file_or_exe" -w )


#:647#
# commandlinefu.com by David Winterbottom

# Open windows executable, file, or folder from cygwin terminal
explorer $( cygpath "/path/to/file_or_exe" -w )


#:648#
# commandlinefu.com by David Winterbottom

# Open windows executable, file, or folder from cygwin terminal
explorer $( cygpath "/path/to/file_or_exe" -w )


#:649#
# commandlinefu.com by David Winterbottom

# OSX command to take badly formatted xml from the clipboard, cleans it up and p
uts it back into the clipboard.
pbpaste | tidy -xml -wrap 0 | pbcopy


#:650#
# commandlinefu.com by David Winterbottom

# OSX command to take badly formatted xml from the clipboard, cleans it up and p
uts it back into the clipboard.
pbpaste | tidy -xml -wrap 0 | pbcopy


#:651#
# commandlinefu.com by David Winterbottom

# OSX command to take badly formatted xml from the clipboard, cleans it up and p
uts it back into the clipboard.
pbpaste | tidy -xml -wrap 0 | pbcopy


#:652#
# commandlinefu.com by David Winterbottom

# Search trought pidgin's conversation logs for "searchterm", and output the res
ult.
grep -Ri searchterm  ~/.purple/logs/*  | sed -e 's/<.*?>//g'

# Tail the most recently modified file
ls -t1 | head -n1 | xargs tail -f

# Follow tail by name (fix for rolling logs with tail -f)
tail -F file


#:653#
# commandlinefu.com by David Winterbottom

# validate xml in a shell script.
xmlproc_parse.python-xml &>/dev/null <FILE> || exit 1

# Lists unambigously names of all xml elements used in files in current director
y
grep -Eho '<[a-ZA-Z_][a-zA-Z0-9_-:]*' * | sort -u | cut -c2-

# Simple XML tag extract with sed
sed -n 's/.*<foo>\([^<]*\)<\/foo>.*/\1/p'


#:654#
# commandlinefu.com by David Winterbottom

# get events from google calendar for a given dates range
wget -q -O - 'URL/full?orderby=starttime&singleevents=true&start-min=2009-06-01&
start-max=2009-07-31' |  perl -lane '@m=$_=~m/<title type=.text.>(.+?)</g;@a=$_=
~m/startTime=.(2009.+?)T/g;shift @m;for ($i=0;$i<@m;$i++){ print $m[$i].",".$a[$
i];}';


#:655#
# commandlinefu.com by David Winterbottom

# get events from google calendar for a given dates range
wget -q -O - 'URL/full?orderby=starttime&singleevents=true&start-min=2009-06-01&
start-max=2009-07-31' |  perl -lane '@m=$_=~m/<title type=.text.>(.+?)</g;@a=$_=
~m/startTime=.(2009.+?)T/g;shift @m;for ($i=0;$i<@m;$i++){ print $m[$i].",".$a[$
i];}';


#:656#
# commandlinefu.com by David Winterbottom

# Output a SSL certificate start or end date
date --date="$(openssl x509 -in xxxxxx.crt -noout -startdate | cut -d= -f 2)" --
iso-8601


#:657#
# commandlinefu.com by David Winterbottom

# Output a SSL certificate start or end date
date --date="$(openssl x509 -in xxxxxx.crt -noout -startdate | cut -d= -f 2)" --
iso-8601


#:658#
# commandlinefu.com by David Winterbottom

# Bypass 1000 Entry limit of Active Directory with ldapsearch
ldapsearch -LLL  -H ldap://${HOST}:389 -b 'DC=${DOMAIN},DC=${TLD}' -D '${USER}'
-w 'password' objectclass=* -E pr=2147483647/noprompt


#:659#
# commandlinefu.com by David Winterbottom

# find and grep Word docs
find . -iname '*filename*.doc' | { while read line; do antiword "$line"; done; }
 | grep -C4 search_term;


#:660#
# commandlinefu.com by David Winterbottom

# find and grep Word docs
find . -iname '*filename*.doc' | { while read line; do antiword "$line"; done; }
 | grep -C4 search_term;


#:661#
# commandlinefu.com by David Winterbottom

# find and grep Word docs
find . -iname '*filename*.doc' | { while read line; do antiword "$line"; done; }
 | grep -C4 search_term;


#:662#
# commandlinefu.com by David Winterbottom

# Gentoo: Get the size of all installed packets, sorted
equery s | sed 's/(\|)/ /g' | sort -n -k 9 | gawk '{print $1" "$9/1048576"m"}'


#:663#
# commandlinefu.com by David Winterbottom

# Check reverse DNS
nslookup {ip}

# Check reverse DNS
dig +short -x {ip}

# geoip information
geo(){ curl -s "http://www.geody.com/geoip.php?ip=$(dig +short $1)"| sed '/^IP:/
!d;s/<[^>][^>]*>//g'; }

# Check if a .no domain is available
check_dns_no() { for i in $* ; do if `wget -O - -q http://www.norid.no/domenenav
nbaser/whois/?query=$i.no | grep "no match" &>/dev/null` ; then echo $i.no "avai
lable" ; fi ; sleep 1 ;done }

# Perform a reverse DNS lookup
dig -x 74.125.45.100

# Query Wikipedia via console over DNS
dig +short txt <keyword>.wp.dg.cx


#:664#
# commandlinefu.com by David Winterbottom

# Query Wikipedia via console over DNS
dig +short txt <keyword>.wp.dg.cx


#:665#
# commandlinefu.com by David Winterbottom

# Query Wikipedia via console over DNS
dig +short txt <keyword>.wp.dg.cx


#:666#
# commandlinefu.com by David Winterbottom

# Check reverse DNS
nslookup {ip}

# Check reverse DNS
dig +short -x {ip}

# Check reverse DNS
dig -x {IP}

# Check reverse DNS
host {checkIp or hostname} [dns server]

# Check if a .no domain is available
check_dns_no() { for i in $* ; do if `wget -O - -q http://www.norid.no/domenenav
nbaser/whois/?query=$i.no | grep "no match" &>/dev/null` ; then echo $i.no "avai
lable" ; fi ; sleep 1 ;done }

# List of reverse DNS records for a subnet
nmap -R -sL 209.85.229.99/27 | awk '{if($3=="not")print"("$2") no PTR";else prin
t$3" is "$2}' | grep '('

# Use dig instead of nslookup
dig google.com

# Query Wikipedia via console over DNS
dig +short txt <keyword>.wp.dg.cx


#:667#
# commandlinefu.com by David Winterbottom

# Get Futurama quotations from slashdot.org servers
curl -sI http://slashdot.org/ | sed -nr 's/X-(Bender|Fry)(.*)/\1\2/p'


#:668#
# commandlinefu.com by David Winterbottom

# from the console, start a second X server
xinit -- :1


#:669#
# commandlinefu.com by David Winterbottom

# Check if a domain is available and get the answer in just one line
whois domainnametocheck.com | grep match

# Query ip pools based on successive netnames via whois
net=DTAG-DIAL ; for (( i=1; i<30; i++ )); do whois -h whois.ripe.net $net$i | gr
ep '^inetnum:' | sed "s;^.*:;$net$i;" ; done


#:670#
# commandlinefu.com by David Winterbottom

# Query ip pools based on successive netnames via whois
net=DTAG-DIAL ; for (( i=1; i<30; i++ )); do whois -h whois.ripe.net $net$i | gr
ep '^inetnum:' | sed "s;^.*:;$net$i;" ; done


#:671#
# commandlinefu.com by David Winterbottom

# Query ip pools based on successive netnames via whois
net=DTAG-DIAL ; for (( i=1; i<30; i++ )); do whois -h whois.ripe.net $net$i | gr
ep '^inetnum:' | sed "s;^.*:;$net$i;" ; done


#:672#
# commandlinefu.com by David Winterbottom

# Query ip pools based on successive netnames via whois
net=DTAG-DIAL ; for (( i=1; i<30; i++ )); do whois -h whois.ripe.net $net$i | gr
ep '^inetnum:' | sed "s;^.*:;$net$i;" ; done


#:673#
# commandlinefu.com by David Winterbottom

# Shows how many percents of all avaliable packages are installed in your gentoo
 system
echo $((`eix --only-names -I | wc -l` * 100 / `eix --only-names | wc -l`))%


#:674#
# commandlinefu.com by David Winterbottom

# Batch image resize
for a in `ls`; do echo $a && convert $a -resize <Width>x<Height> $a; done


#:675#
# commandlinefu.com by David Winterbottom

# Easily decode unix-time (funtion)
utime(){ perl -e "print localtime($1).\"\n\"";}

# Convert a MOV captured from a digital camera to a smaller AVI
ffmpeg -i input.mov -b 4096k -vcodec msmpeg4v2 -acodec pcm_u8 output.avi

# Function to output an ASCII character given its decimal equivalent
chr () { echo -en "\0$(printf %x $1)"}

# Function to output an ASCII character given its decimal equivalent
chr() { printf \\$(printf %o $1); }

# Function to output an ASCII character given its decimal equivalent
chr () { printf \\$(($1/64*100+$1%64/8*10+$1%8)); }

# Quick and dirty convert to flash
ffmpeg -i inputfile.mp4 outputfile.flv

# Remove CR from Windows- / DOS-textfiles
dos2unix file.txt

# Remove CR from Windows- / DOS-textfiles
tr -d '\r' < ${input_txt} > ${output_txt}

# Remove ^M characters at end of lines in vi
:%s/^V^M//g

# Batch image resize
for a in `ls`; do echo $a && convert $a -resize <Width>x<Height> $a; done


#:676#
# commandlinefu.com by David Winterbottom

# Copy with progress
copy(){ cp -v "$1" "$2"&watch -n 1 'du -h "$1" "$2";printf "%s%%\n" $(echo `du -
h "$2"|cut -dG -f1`/0.`du -h "$1"|cut -dG -f1`|bc)';}


#:677#
# commandlinefu.com by David Winterbottom

# copy working directory and compress it on-the-fly while showing progress
tar -cf - . | pv -s $(du -sb . | awk '{print $1}') | gzip > out.tgz

# Copy with progress
copy(){ cp -v "$1" "$2"&watch -n 1 'du -h "$1" "$2";printf "%s%%\n" $(echo `du -
h "$2"|cut -dG -f1`/0.`du -h "$1"|cut -dG -f1`|bc)';}


#:678#
# commandlinefu.com by David Winterbottom

# Create AUTH PLAIN string to test SMTP AUTH session
printf '\!:1\0\!:1\0\!:2' | mmencode | tr -d '\n' | sed 's/^/AUTH PLAIN /'


#:679#
# commandlinefu.com by David Winterbottom

# List out classes in of all htmls in directory
find . -name '*.html' -exec  'sed' 's/.*class="\([^"]*\?\)".*/\1/ip;d' '{}' ';'
|sort -su

# Create AUTH PLAIN string to test SMTP AUTH session
printf '\!:1\0\!:1\0\!:2' | mmencode | tr -d '\n' | sed 's/^/AUTH PLAIN /'


#:680#
# commandlinefu.com by David Winterbottom

# Chage default shell for all users [FreeBSD]
cd /usr/home && for i in *;do chsh -s bash $i;done

# Nicely display permissions in octal format with filename
stat -f '%Sp %p %N' * | rev | sed -E 's/^([^[:space:]]+)[[:space:]]([[:digit:]]{
4})[^[:space:]]*[[:space:]]([^[:space:]]+)/\1 \2 \3/' | rev

# Delete all aliases for a network interface on a (Free)BSD system
ifconfig | grep "0xffffffff" | awk '{ print $2 }' | xargs -n 1 ifconfig em0 dele
te


#:681#
# commandlinefu.com by David Winterbottom

# Define an alias with a correct completion
old='apt-get'; new="su-${old}"; command="sudo ${old}"; alias "${new}=${command}"
; $( complete | sed -n "s/${old}$/${new}/p" ); alias ${new}; complete -p ${new}

# Delete all aliases for a network interface on a (Free)BSD system
ifconfig | grep "0xffffffff" | awk '{ print $2 }' | xargs -n 1 ifconfig em0 dele
te


#:682#
# commandlinefu.com by David Winterbottom

# Delete all aliases for a network interface on a (Free)BSD system
ifconfig | grep "0xffffffff" | awk '{ print $2 }' | xargs -n 1 ifconfig em0 dele
te


#:683#
# commandlinefu.com by David Winterbottom

# Find and display most recent files using find and perl
find $HOME -type f -print0 | perl -0 -wn -e '@f=<>; foreach $file (@f){ (@el)=(s
tat($file)); push @el, $file; push @files,[ @el ];} @o=sort{$a->[9]<=>$b->[9]} @
files; for $i (0..$#o){print scalar localtime($o[$i][9]), "\t$o[$i][-1]\n";}'|ta
il

# Nicely display permissions in octal format with filename
stat -f '%Sp %p %N' * | rev | sed -E 's/^([^[:space:]]+)[[:space:]]([[:digit:]]{
4})[^[:space:]]*[[:space:]]([^[:space:]]+)/\1 \2 \3/' | rev


#:684#
# commandlinefu.com by David Winterbottom

# View the octal dump of a file
od -vt x1 /tmp/spaghettifile

# Nicely display permissions in octal format with filename
stat -f '%Sp %p %N' * | rev | sed -E 's/^([^[:space:]]+)[[:space:]]([[:digit:]]{
4})[^[:space:]]*[[:space:]]([^[:space:]]+)/\1 \2 \3/' | rev


#:685#
# commandlinefu.com by David Winterbottom

# command to change the exif date time of a image
exiftool -DateTimeOriginal='2009:01:01 02:03:04' file.jpg

# Move all images in a directory into a directory hierarchy based on year, month
 and day based on exif information
exiftool '-Directory<DateTimeOriginal' -d %Y/%m/%d dir


#:686#
# commandlinefu.com by David Winterbottom

# Slightly better compressed archives
find . \! -type d | rev | sort | rev | tar c --files-from=- --format=ustar | bzi
p2 --best > a.tar.bz2

# echo something backwards
echo linux|rev


#:687#
# commandlinefu.com by David Winterbottom

# Disable annoying sound emanations from the PC speaker
sudo rmmod pcspkr


#:688#
# commandlinefu.com by David Winterbottom

# Use Linux coding style in C program
indent -linux helloworld.c


#:689#
# commandlinefu.com by David Winterbottom

# Go get those photos from a Picasa album
wget 'link of a Picasa WebAlbum' -O - |perl -e'while(<>){while(s/"media":{"conte
nt":\[{"url":"(.+?\.JPG)//){print "$1\n"}}' |wget -w1 -i -

# Download a TiVo Show
curl -s -c /tmp/cookie -k -u tivo:$MAK --digest "$(curl -s -c /tmp/cookie -k -u
tivo:$MAK --digest https://$tivo/nowplaying/index.html | sed 's;.*<a href="\([^"
]*\)">Download MPEG-PS</a>.*;\1;' | sed 's|\&amp;|\&|')" | tivodecode -m $MAK --
 - > tivo.mpg

# Go get those photos from a Picasa album
echo 'Enter Picasa album RSS URL:"; read -e feedurl; GET "$feedurl" |sed 's/</\n
</g' | grep media:content |sed 's/.*url='"'"'\([^'"'"']*\)'"'"'.*$/\1/' > wgetli
st

# Log your internet download speed
echo $(date +%s) > start-time; URL=http://www.google.com; while true; do echo $(
curl -L --w %{speed_download} -o/dev/null -s $URL) >> bps; sleep 10; done &

# Put the machine to sleep after the download(wget) is done
while [ -n "`pgrep wget`" ]; do sleep 2 ;done; [ -e "/tmp/nosleep"] || echo  mem
 >/sys/power/state

# Download Youtube Playlist
y=http://www.youtube.com;for i in $(curl -s $f|grep -o "url='$y/watch?v=[^']*'")
;do d=$(echo $i|sed "s;url\='$y/watch?v=\(.*\)';\1;");wget -O $d.flv "$y/get_vid
eo.php?video_id=$d&t=$(curl -s "$y/watch?v=$d"|sed -n 's/.*, "t": "\([^"]*\)", .
*/\1/p')";done

# Download file with multiple simultaneous connections
aria2c -s 4 http://my/url

# use curl to resume a failed download
cat file-that-failed-to-download.zip | curl -C - http://www.somewhere.com/file-I
-want-to-download.zip >successfully-downloaded.zip


#:690#
# commandlinefu.com by David Winterbottom

# use curl to resume a failed download
cat file-that-failed-to-download.zip | curl -C - http://www.somewhere.com/file-I
-want-to-download.zip >successfully-downloaded.zip


#:691#
# commandlinefu.com by David Winterbottom

# Sort your music
for file in *.mp3;do mkdir -p "$(mp3info -p "%a/%l" "$file")" && ln -s "$file" "
$(mp3info -p "%a/%l/%t.mp3" "$file")";done


#:692#
# commandlinefu.com by David Winterbottom

# Sort your music
for file in *.mp3;do mkdir -p "$(mp3info -p "%a/%l" "$file")" && ln -s "$file" "
$(mp3info -p "%a/%l/%t.mp3" "$file")";done


#:693#
# commandlinefu.com by David Winterbottom

# Sort your music
for file in *.mp3;do mkdir -p "$(mp3info -p "%a/%l" "$file")" && ln -s "$file" "
$(mp3info -p "%a/%l/%t.mp3" "$file")";done


#:694#
# commandlinefu.com by David Winterbottom

# Send email with one or more binary attachments
echo "Body goes here" | mutt -s "A subject" -a /path/to/file.tar.gz recipient@ex
ample.com


#:695#
# commandlinefu.com by David Winterbottom

# Send a local file via email
mpack -s "Backup: $file" "$file" email@id.com

# Send a local file via email
mutt your@email_address.com -s "Message Subject Here" -a attachment.jpg </dev/nu
ll

# Build an exhaustive list of maildir folders for mutt
find ~/Maildir/ -mindepth 1 -type d | egrep -v '/cur$|/tmp$|/new$' | xargs

# Send email with one or more binary attachments
echo "Body goes here" | mutt -s "A subject" -a /path/to/file.tar.gz recipient@ex
ample.com


#:696#
# commandlinefu.com by David Winterbottom

# grep (or anything else) many files with multiprocessor power
find . -type f -print0 | xargs -0 -P 4 -n 40 grep -i foobar


#:697#
# commandlinefu.com by David Winterbottom

# grep (or anything else) many files with multiprocessor power
find . -type f -print0 | xargs -0 -P 4 -n 40 grep -i foobar


#:698#
# commandlinefu.com by David Winterbottom

# Quickly (soft-)reboot skipping hardware checks
/sbin/kexec -l /boot/$KERNEL --append="$KERNELPARAMTERS" --initrd=/boot/$INITRD;
 sync; /sbin/kexec -e


#:699#
# commandlinefu.com by David Winterbottom

# modify (mozldap) with proxy authentication and no other controls
ldapmodify  -Y "dn:uid=rob,dc=example.com" -g  -R -J 2.16.840.1.113730.3.4.16 ..
.


#:700#
# commandlinefu.com by David Winterbottom

# modify (mozldap) with proxy authentication and no other controls
ldapmodify  -Y "dn:uid=rob,dc=example.com" -g  -R -J 2.16.840.1.113730.3.4.16 ..
.


#:701#
# commandlinefu.com by David Winterbottom

# Get your external IP address
fetch -q -o - http://ipchicken.com | egrep -o '([[:digit:]]{1,3}\.){3}[[:digit:]
]{1,3}'


#:702#
# commandlinefu.com by David Winterbottom

# renombrar un archivo que inicia con guion
find . -name "-help" -exec mv {} help.txt \;


#:703#
# commandlinefu.com by David Winterbottom

# Delete empty directories with zsh
rm -d **/*(/^F)


#:704#
# commandlinefu.com by David Winterbottom

# Get your internal IP address and nothing but your internal IP address
ifconfig $devices | grep "inet addr" | sed 's/.*inet addr:\([0-9\.]*\).*/\1/g'


#:705#
# commandlinefu.com by David Winterbottom

# List apache2 virtualhosts
/usr/sbin/apache2ctl -S 2>&1 | perl -ne 'm@.*port\s+([0-9]+)\s+\w+\s+(\S+)\s+\((
.+):.*@ && do { print "$2:$1\n\t$3\n"; $root = qx{grep DocumentRoot $3}; $root =
~ s/^\s+//; print "\t$root\n" };'


#:706#
# commandlinefu.com by David Winterbottom

# Simple read and write test with Iozone
iozone -s 2g -r 64 -i 0 -i 1 -t 1

# Testing reading speed with dd
sync; time `dd if=/dev/cciss/c0d1p1 of=/dev/null bs=1M count=10240`

# Testing writing speed with dd
sync; time `dd if=/dev/zero of=bigfile bs=1M count=2048 && sync`

# Compression formats Benchmark
for a in bzip2 lzma gzip;do echo -n>$a;for b in $(seq 0 256);do dd if=/dev/zero
of=$b.zero bs=$b count=1;c=$(date +%s%N);$a $b.zero;d=$(date +%s%N);total=$(echo
 $d-$c|bc);echo $total>>$a;rm $b.zero *.bz2 *.lzma *.gz;done;done

# benchmark web server with apache benchmarking tool
ab -n 9000 -c 900 localhost:8080/index.php


#:707#
# commandlinefu.com by David Winterbottom

# Get your public ip
python -c "import socket; s=socket.socket(socket.AF_INET, socket.SOCK_DGRAM); s.
connect(('google.com', 80)); print s.getsockname()[0]"

# Display IP adress of the given interface in a most portable and reliable way.
That should works on many platforms.
x=IO::Interface::Simple; perl -e 'use '$x';' &>/dev/null || cpan -i "$x"; perl -
e 'use '$x'; my $ip='$x'->new($ARGV[0]); print $ip->address,$/;' <INTERFACE>

# Show local/public IP adresses with or without interface argument using a shell
 function for Linux and MacOsX
MyIps(){ echo -e "local:\n$(ifconfig $1 | grep -oP 'inet (add?r:)?\K(\d{1,3}\.){
3}\d{1,3}')\n\npublic:\n$(curl -s sputnick-area.net/ip)"; }

# Return IP Address
perl -e '$_=`ifconfig eth0`;/\d+.\d+.\d+.\d+ /; print $&,"\n";'

# Return IP Address
ifconfig|while read i;do [[ $i =~ inet.*B ]]&&r=${i%%B*}&&echo ${r/*[tr]:/};done

# Show local IP
ifconfig eth0 | grep "inet:" | cut -d ":" -f2 | cut -d " " -f1

# Return IP Address
ifconfig -a| awk 'BEGIN{FS="[ :]+"} /Bcast/{print $4}'

# Return IP Address
ifconfig -a|grep Bcast:|cut -d\: -f2|awk '{print $1}'

# Return IP Address
ifconfig | awk '/inet /{sub(/^[^:]+:/,"",$2); print $2}'

# Return IP Address
/usr/sbin/ifconfig -a|awk -F" " 'NR==4{print $2}'

# Get your external IP address
curl ip.appspot.com

# regex to match an ip
echo 127.0.0.1 | egrep -e '^(([01]?[0-9]{1,2}|2[0-4][0-9]|25[0-4])\.){3}([01]?[0
-9]{1,2}|2[0-4][0-9]|25[0-4])$'

# regex to match an ip
perl -wlne 'print $1 if /(([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25
[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5]))/' iplist

# regex to match an ip
echo 254.003.032.3 | grep -P '^((25[0-4]|2[0-4]\d|[01]?[\d]?[1-9])\.){3}(25[0-4]
|2[0-4]\d|[01]?[\d]?[1-9])$'

# regex to match an ip
echo "123.32.12.134" | grep -P '([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4
]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])\.([01]?\d\d?|2[0-4]\d|25[0-5])'

# find all active IP addresses in a network
arp-scan -l

# find all active IP addresses in a network
nmap -sP 192.168.0.*

# Get internal and external IP addresses
ips(){ for if in ${1:-$(ip link list|grep '^.: '|cut -d\  -f2|cut -d: -f1)};do c
ur=$(ifconfig $if|grep "inet addr"|sed 's/.*inet addr:\([0-9\.]*\).*/\1/g');prin
tf '%-5s%-15s%-15s\n' $if $cur $(nc -s $cur sine.cluenet.org 128 2>/dev/null||ec
ho $cur);done;}

# Get own public IP address
wget -qO- whatismyip.org


#:708#
# commandlinefu.com by David Winterbottom

# Get a list of all your VirtualBox virtual machines by name and UUID from the s
hell
VBoxManage list vms

# run a VirtualBox virtual machine without a gui
VBoxHeadless -s <name|uuid>


#:709#
# commandlinefu.com by David Winterbottom

# Save VM running as headless
VBoxManage controlvm ServidorProducao savestate

# Running VirtualBox as headless
nohup VBoxHeadless -p 3052 -startvm ServidorProducao &

# run a VirtualBox virtual machine without a gui
VBoxHeadless -s <name|uuid>


#:710#
# commandlinefu.com by David Winterbottom

# Get a list of all your VirtualBox virtual machines by name and UUID from the s
hell
VBoxManage list vms


#:711#
# commandlinefu.com by David Winterbottom

# get time in other timezones
tzwatch

# get time in other timezones
tzwatch

# get time in other timezones
let utime=$offsetutc*3600+$(date --utc +%s)+3600; date --utc --date=@${utime}


#:712#
# commandlinefu.com by David Winterbottom

# floating point shell calculator
calc() { awk 'BEGIN { OFMT="%f"; print '"$*"'; exit}'; }

# floating point bash calculator w/o precision
b(){ echo "scale=${2:-2}; $1" | bc -l; }

# get time in other timezones
tzwatch

# get time in other timezones
tzwatch

# get time in other timezones
let utime=$offsetutc*3600+$(date --utc +%s)+3600; date --utc --date=@${utime}


#:713#
# commandlinefu.com by David Winterbottom

# get time in other timezones
tzwatch

# get time in other timezones
tzwatch

# get time in other timezones
let utime=$offsetutc*3600+$(date --utc +%s)+3600; date --utc --date=@${utime}


#:714#
# commandlinefu.com by David Winterbottom

# pipe commands from a textfile to a telnet-server with netcat
nc $telnetserver 23 < $commandfile


#:715#
# commandlinefu.com by David Winterbottom

# complete extraction of a debian-package
dpkg-deb -x $debfile $extractdir; dpkg-deb -e $debfile $extractdir/DEBIAN;


#:716#
# commandlinefu.com by David Winterbottom

# 32 bits or 64 bits?
getconf LONG_BIT


#:717#
# commandlinefu.com by David Winterbottom

# 32 bits or 64 bits?
sudo lshw -C cpu|grep width

# 32 bits or 64 bits?
getconf LONG_BIT


#:718#
# commandlinefu.com by David Winterbottom

# 32 bits or 64 bits?
sudo lshw -C cpu|grep width

# 32 bits or 64 bits?
getconf LONG_BIT


#:719#
# commandlinefu.com by David Winterbottom

# A fun thing to do with ram is actually open it up and take a peek. This comman
d will show you all the string (plain text) values in ram
sudo strings /dev/mem

# A fun thing to do with ram is actually open it up and take a peek. This comman
d will show you all the string (plain text) values in ram
strings /dev/mem|less


#:720#
# commandlinefu.com by David Winterbottom

# back up your commandlinefu contributed commands
curl http://www.commandlinefu.com/commands/by/<your username>/rss|gzip ->command
linefu-contribs-backup-$(date +%Y-%m-%d-%H.%M.%S).rss.gz


#:721#
# commandlinefu.com by David Winterbottom

# Output Detailed Process Tree for any User
psu(){ command ps -Hcl -F S f -u ${1:-$USER}; }

# Sort all running processes by their memory & CPU usage
ps aux --sort=%mem,%cpu

# get users process list
ps -u<user>

# View Processeses like a fu, fu
pstree -p

# View Processeses like a fu, fu
command ps -Hacl -F S -A f

# Get a regular updated list of zombies
watch "ps auxw | grep [d]efunct"

# Get a regular updated list of zombies
watch "ps auxw | grep 'defunct' | grep -v 'grep' | grep -v 'watch'"


#:722#
# commandlinefu.com by David Winterbottom

# Get a regular updated list of zombies
watch "ps auxw | grep [d]efunct"

# Get a regular updated list of zombies
watch "ps auxw | grep 'defunct' | grep -v 'grep' | grep -v 'watch'"


#:723#
# commandlinefu.com by David Winterbottom

# Watch changeable interrupts continuously
watch -n1 'cat /proc/interrupts

# CPU model
cat /proc/cpuinfo

# detected hardware and boot messages
sudo dmesg

# get debian version number
lsb_release -a

# get kernel version
uname -a

# System load information alongside process information in a similar style to to
p.
atop

# detect the Super I/O chip on your computer, tell you at which configuration po
rt it is located and can dump all the register contents.
superiotool

# parses the BIOS memory and prints information about all structures (or entry p
oints) it knows of.
biosdecode

# x86info
x86info

# get basic information out of your computer
lspci

# On Mac OS X, runs System Profiler Report and e-mails it to specified address.
system_profiler | mail -s "$HOSTNAME System Profiler Report" user@domain.com


#:724#
# commandlinefu.com by David Winterbottom

# Preview of a picture in a terminal
img test.jpg


#:725#
# commandlinefu.com by David Winterbottom

# Download file with multiple simultaneous connections
aria2c -s 4 http://my/url


#:726#
# commandlinefu.com by David Winterbottom

# Download file with multiple simultaneous connections
aria2c -s 4 http://my/url


#:727#
# commandlinefu.com by David Winterbottom

# Click on a GUI window and show its process ID and command used to run the proc
ess
xprop | awk '/PID/ {print $3}' | xargs ps h -o pid,cmd


#:728#
# commandlinefu.com by David Winterbottom

# find only current directory (universal)
find . \( ! -name . -prune \) \( -type f -o -type l \)


#:729#
# commandlinefu.com by David Winterbottom


#:730#
# commandlinefu.com by David Winterbottom

# move a lot of files over ssh
rsync -az /home/user/test user@sshServer:/tmp/

# move a lot of files over ssh
tar -cf - /home/user/test | gzip -c | ssh user@sshServer 'cd /tmp; tar xfz -'

# Batch file name renaming (copying or moving) w/ glob matching.
for x in *.ex1; do mv "${x}" "${x%ex1}ex2"; done


#:731#
# commandlinefu.com by David Winterbottom

# Open in TextMate Sidebar files (recursively) with names matching REGEX_A and n
ot matching REGEX_B
mate - `find * -type f -regex 'REGEX_A' | grep -v -E 'REGEX_B'`


#:732#
# commandlinefu.com by David Winterbottom

# Set default "New Page" as HTML in TextMate
defaults write com.macromates.textmate OakDefaultLanguage 17994EC8-6B1D-11D9-AC3
A-000D93589AF6

# Open files of the same name in TextMate
mate - `find . -name 'filename'`

# Open in TextMate Sidebar files (recursively) with names matching REGEX_A and n
ot matching REGEX_B
mate - `find * -type f -regex 'REGEX_A' | grep -v -E 'REGEX_B'`


#:733#
# commandlinefu.com by David Winterbottom

# Open in TextMate Sidebar files (recursively) with names matching REGEX_A and n
ot matching REGEX_B
mate - `find * -type f -regex 'REGEX_A' | grep -v -E 'REGEX_B'`


#:734#
# commandlinefu.com by David Winterbottom

# Remove empty directories
rmdir **/*(/^F)

# Remove empty directories
find . -type d -empty -delete


#:735#
# commandlinefu.com by David Winterbottom

# Checking total connections to each Ip inserver
netstat -alpn | grep :80 | awk '{print $4}' |awk -F: '{print $(NF-1)}' |sort |
uniq -c | sort -n


#:736#
# commandlinefu.com by David Winterbottom

# print latest (top 10, top 3 or *) commandlinefu.com commands
wget -qO - http://www.commandlinefu.com/feed/tenup | xmlstarlet sel -T -t -o '&l
t;x&gt;' -n -t -m rss/channel/item -o '&lt;y&gt;' -n -v description -o '&lt;/y&g
t;' -n -t -o '&lt;/x&gt;' | xmlstarlet sel -T -t -m x/y -v code -n


#:737#
# commandlinefu.com by David Winterbottom

# Go get those photos from a Picasa album
wget 'link of a Picasa WebAlbum' -O - |perl -e'while(<>){while(s/"media":{"conte
nt":\[{"url":"(.+?\.JPG)//){print "$1\n"}}' |wget -w1 -i -

# Go get those photos from a Picasa album
echo 'Enter Picasa album RSS URL:"; read -e feedurl; GET "$feedurl" |sed 's/</\n
</g' | grep media:content |sed 's/.*url='"'"'\([^'"'"']*\)'"'"'.*$/\1/' > wgetli
st

# Check your unread Gmail from the command line
curl -u username --silent "https://mail.google.com/mail/feed/atom" | perl -ne 'p
rint "\t" if /<name>/; print "$2\n" if /<(title|name)>(.*)<\/\1>/;'

# Check your unread Gmail from the command line
curl -u username:password --silent "https://mail.google.com/mail/feed/atom" | tr
 -d '\n' | awk -F '<entry>' '{for (i=2; i<=NF; i++) {print $i}}' | sed -n "s/<ti
tle>\(.*\)<\/title.*name>\(.*\)<\/name>.*/\2 - \1/p"

# print latest (top 10, top 3 or *) commandlinefu.com commands
wget -qO - http://www.commandlinefu.com/feed/tenup | xmlstarlet sel -T -t -o '&l
t;x&gt;' -n -t -m rss/channel/item -o '&lt;y&gt;' -n -v description -o '&lt;/y&g
t;' -n -t -o '&lt;/x&gt;' | xmlstarlet sel -T -t -m x/y -v code -n


#:738#
# commandlinefu.com by David Winterbottom

# Add
rename 's/^/prefix/' *


#:739#
# commandlinefu.com by David Winterbottom

# Will email user@example.com when all Rsync processes have finished.
$(while [ ! -z "$(pgrep rsync)" ]; do echo; done; echo "rsync done" | mailx user
@example.com) > /dev/null &


#:740#
# commandlinefu.com by David Winterbottom

# monitor network traffic and throughput in real time
iptraf

# Grab an interface's IP from ifconfig without screen clutter
ifconfig eth1 | grep inet\ addr | awk '{print $2}' | cut -d: -f2 | sed s/^/eth1:
\ /g

# retrieve the source address used to contact a given host
python -c 'import socket;  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
; s.connect(("<hostname>", <port>)); print s.getsockname()[0] ; s.close() ;' 2>
/dev/null

# List open TCP/UDP ports
netstat -ltun

# Get ethernet card information.
ethtool eth0

# checks if host /service is up on a host that doesn't respond to ping
while true; do clear; nmap ${hostname} -PN -p ${hostport}; sleep 5; done


#:741#
# commandlinefu.com by David Winterbottom

# amixer : raise volume and unmute if necessary
amixer -c 0 set Master 1+ unmute


#:742#
# commandlinefu.com by David Winterbottom

# Normalize volume in your mp3 library
find . -type d -exec sh -c "normalize-audio -b \"{}\"/*.mp3" \;

# amixer : raise volume and unmute if necessary
amixer -c 0 set Master 1+ unmute


#:743#
# commandlinefu.com by David Winterbottom

# avi to ogv (Ogg Theora)
ffmpeg2theora input.avi


#:744#
# commandlinefu.com by David Winterbottom

# Unarchive entire folder
for f in *;do case "$(echo $f|sed "s/.*\.\([a-z\.]*\)/\1/g")" in zip)unzip -qqo
$f&&rm $f;;tar.gz|tar.bz2)tar xf $f&&rm $f;;rar)unrar e -o+ -r -y $f&&rm $f;;7z)
7z e -qqo $f;;esac;done


#:745#
# commandlinefu.com by David Winterbottom

# Unarchive entire folder
for f in *;do case "$(echo $f|sed "s/.*\.\([a-z\.]*\)/\1/g")" in zip)unzip -qqo
$f&&rm $f;;tar.gz|tar.bz2)tar xf $f&&rm $f;;rar)unrar e -o+ -r -y $f&&rm $f;;7z)
7z e -qqo $f;;esac;done


#:746#
# commandlinefu.com by David Winterbottom

# Check availability of Websites based on HTTP_CODE
urls=('www.ubuntu.com' 'google.com'); for i in ${urls[@]}; do http_code=$(curl -
I -s $i -w %{http_code}); echo $i status: ${http_code:9:3}; done


#:747#
# commandlinefu.com by David Winterbottom

# Create Encrypted WordPress MySQL Backup without any DB details, just the wp-co
nfig.php
eval $(sed -e "s/^d[^D]*DB_\([NUPH]\).*',[^']*'\([^']*\)'.*/_\1='\2';/" -e "/^_/
!d" wp-config.php) && mysqldump --opt --add-drop-table -u$_U -p$_P -h$_H $_N | g
pg -er AskApache >`date +%m%d%y-%H%M.$_N.sqls`


#:748#
# commandlinefu.com by David Winterbottom

# Create Encrypted WordPress MySQL Backup without any DB details, just the wp-co
nfig.php
eval $(sed -e "s/^d[^D]*DB_\([NUPH]\).*',[^']*'\([^']*\)'.*/_\1='\2';/" -e "/^_/
!d" wp-config.php) && mysqldump --opt --add-drop-table -u$_U -p$_P -h$_H $_N | g
pg -er AskApache >`date +%m%d%y-%H%M.$_N.sqls`


#:749#
# commandlinefu.com by David Winterbottom

# backup local MySQL database into a folder and removes older then 5 days backup
s
mysqldump -uUSERNAME -pPASSWORD database | gzip > /path/to/db/files/db-backup-`d
ate +%Y-%m-%d`.sql.gz ;find /path/to/db/files/* -mtime +5 -exec rm {} \;

# Get a MySQL DB dump from a remote machine
ssh user@host "mysqldump -h localhost -u mysqluser -pP@$$W3rD databasename | gzi
p -cf" | gunzip -c > database.sql

# Backup all MySQL Databases to individual files
mysql -e 'show databases' | sed -n '2,$p' | xargs -I DB 'mysqldump DB > DB.sql'

# Create Encrypted WordPress MySQL Backup without any DB details, just the wp-co
nfig.php
eval $(sed -e "s/^d[^D]*DB_\([NUPH]\).*',[^']*'\([^']*\)'.*/_\1='\2';/" -e "/^_/
!d" wp-config.php) && mysqldump --opt --add-drop-table -u$_U -p$_P -h$_H $_N | g
pg -er AskApache >`date +%m%d%y-%H%M.$_N.sqls`


#:750#
# commandlinefu.com by David Winterbottom

# Create Encrypted WordPress MySQL Backup without any DB details, just the wp-co
nfig.php
eval $(sed -e "s/^d[^D]*DB_\([NUPH]\).*',[^']*'\([^']*\)'.*/_\1='\2';/" -e "/^_/
!d" wp-config.php) && mysqldump --opt --add-drop-table -u$_U -p$_P -h$_H $_N | g
pg -er AskApache >`date +%m%d%y-%H%M.$_N.sqls`


#:751#
# commandlinefu.com by David Winterbottom

# Schedule Nice Background Commands That Won't Die on Logout - Alternative to no
hup and at
( trap '' 1; ( nice -n 19 sleep 2h && command rm -v -rf /garbage/ &>/dev/null &&
 trap 1 ) & )

# Schedule a script or command in x num hours, silently run in the background ev
en if logged out
echo "nohup command rm -rf /phpsessions 1>&2 &>/dev/null 1>&2 &>/dev/null&" | at
 now + 3 hours 1>&2 &>/dev/null

# Silently Execute a Shell Script that runs in the background and won't die on H
UP/logout
nohup /bin/sh myscript.sh 1>&2 &>/dev/null 1>&2 &>/dev/null&


#:752#
# commandlinefu.com by David Winterbottom

# Schedule Nice Background Commands That Won't Die on Logout - Alternative to no
hup and at
( trap '' 1; ( nice -n 19 sleep 2h && command rm -v -rf /garbage/ &>/dev/null &&
 trap 1 ) & )

# Silently Execute a Shell Script that runs in the background and won't die on H
UP/logout
nohup /bin/sh myscript.sh 1>&2 &>/dev/null 1>&2 &>/dev/null&


#:753#
# commandlinefu.com by David Winterbottom

# FAST and NICE Search and Replace for Strings in Files
nice -n19 sh -c 'S=askapache && R=htaccess; find . -type f|xargs -P5 -iFF grep -
l -m1 "$S" FF|xargs -P5 -iFF sed -i -e s%${S}%${R}% FF'

# Function that outputs dots every second until command completes
sleeper(){ while `ps -p $1 &>/dev/null`; do echo -n "${2:-.}"; sleep ${3:-1}; do
ne; }; export -f sleeper

# Schedule a script or command in x num hours, silently run in the background ev
en if logged out
( ( sleep 2h; your-command your-args ) & )

# Schedule a script or command in x num hours, silently run in the background ev
en if logged out
echo "nohup command rm -rf /phpsessions 1>&2 &>/dev/null 1>&2 &>/dev/null&" | at
 now + 3 hours 1>&2 &>/dev/null

# Silently Execute a Shell Script that runs in the background and won't die on H
UP/logout
nohup /bin/sh myscript.sh 1>&2 &>/dev/null 1>&2 &>/dev/null&


#:754#
# commandlinefu.com by David Winterbottom

# Silently Execute a Shell Script that runs in the background and won't die on H
UP/logout
nohup /bin/sh myscript.sh 1>&2 &>/dev/null 1>&2 &>/dev/null&


#:755#
# commandlinefu.com by David Winterbottom

# Schedule Nice Background Commands That Won't Die on Logout - Alternative to no
hup and at
( trap '' 1; ( nice -n 19 sleep 2h && command rm -v -rf /garbage/ &>/dev/null &&
 trap 1 ) & )

# power off system in X hours form the current time, here X=2
echo init 0 | at now + 2 hours

# Schedule a script or command in x num hours, silently run in the background ev
en if logged out
echo "nohup command rm -rf /phpsessions 1>&2 &>/dev/null 1>&2 &>/dev/null&" | at
 now + 3 hours 1>&2 &>/dev/null


#:756#
# commandlinefu.com by David Winterbottom

# Read aloud a text file in Ubuntu (and other Unixes with espeak installed
espeak -f text.txt


#:757#
# commandlinefu.com by David Winterbottom

# Read aloud a text file in Ubuntu (and other Unixes with espeak installed
espeak -f text.txt


#:758#
# commandlinefu.com by David Winterbottom

# Update twitter via curl (and also set the "from" bit)
curl -u twitter-username -d status="Hello World, Twitter!" -d source="cURL" http
://twitter.com/statuses/update.xml

# Search commandlinefu.com from the command line using the API
cmdfu(){ curl "http://www.commandlinefu.com/commands/matching/$@/$(echo -n $@ |
openssl base64)/plaintext"; }


#:759#
# commandlinefu.com by David Winterbottom

# (Git) Revert files with changed mode, not content
git diff --numstat | awk '{if ($1 == "0" && $1 == "0") print $3}'  | xargs git c
heckout HEAD

# Show changed files, ignoring permission, date and whitespace changes
git diff --numstat -w --no-abbrev | perl -a -ne '$F[0] != 0 && $F[1] !=0 && prin
t $F[2] . "\n";'


#:760#
# commandlinefu.com by David Winterbottom

# View Processeses like a fu, fu
pstree -p

# View Processeses like a fu, fu
command ps -Hacl -F S -A f


#:761#
# commandlinefu.com by David Winterbottom

# View Processeses like a fu, fu
pstree -p

# View Processeses like a fu, fu
command ps -Hacl -F S -A f


#:762#
# commandlinefu.com by David Winterbottom

# Pipe stdout and stderr, etc., to separate commands
some_command > >(/bin/cmd_for_stdout) 2> >(/bin/cmd_for_stderr)

# Multiple Timed Execution of subshells sleeping in the background using job con
trol and sleep.
S=$SSH_TTY && (sleep 3 && echo -n 'Peace... '>$S & ) && (sleep 5 && echo -n 'Lov
e... '>$S & ) && (sleep 7 && echo 'and Intergalactic Happiness!'>$S & )


#:763#
# commandlinefu.com by David Winterbottom

# Start xterm in given directory
( cd /my/directory; xterm& )

# Multiple Timed Execution of subshells sleeping in the background using job con
trol and sleep.
S=$SSH_TTY && (sleep 3 && echo -n 'Peace... '>$S & ) && (sleep 5 && echo -n 'Lov
e... '>$S & ) && (sleep 7 && echo 'and Intergalactic Happiness!'>$S & )


#:764#
# commandlinefu.com by David Winterbottom

# Function that outputs dots every second until command completes
sleeper(){ while `ps -p $1 &>/dev/null`; do echo -n "${2:-.}"; sleep ${3:-1}; do
ne; }; export -f sleeper

# Multiple Timed Execution of subshells sleeping in the background using job con
trol and sleep.
S=$SSH_TTY && (sleep 3 && echo -n 'Peace... '>$S & ) && (sleep 5 && echo -n 'Lov
e... '>$S & ) && (sleep 7 && echo 'and Intergalactic Happiness!'>$S & )


#:765#
# commandlinefu.com by David Winterbottom

# Connect to SMTP server using STARTTLS
openssl s_client -starttls smtp -crlf -connect 127.0.0.1:25


#:766#
# commandlinefu.com by David Winterbottom

# Use curl on Windows to bulk-download the Savitabhabhi Comic Strip (for Adults)
for /L %%x in (1,1,16) do mkdir %%x & curl -R -e http://www.kirtu.com -o %%x/#1.
jpg http://www.kirtu.com/toon/content/sb%x/english/sb%x_en_[001-070].jpg

# Remove ^M characters at end of lines in vi
:%s/^V^M//g


#:767#
# commandlinefu.com by David Winterbottom

# Remove ^M characters at end of lines in vi
:%s/^V^M//g


#:768#
# commandlinefu.com by David Winterbottom

# Save iptables firewall info
sudo iptables-save > /etc/iptables.up.rules


#:769#
# commandlinefu.com by David Winterbottom

# replace old htaccess php AddHandler values with new one
find /var/www/ -type f -name ".htaccess" -exec perl -pi -e 's/AddHandler[\s]*php
(4|5)-cgi/AddHandler x-httpd-php\1/' {} \;


#:770#
# commandlinefu.com by David Winterbottom

# replace old htaccess php AddHandler values with new one
find /var/www/ -type f -name ".htaccess" -exec perl -pi -e 's/AddHandler[\s]*php
(4|5)-cgi/AddHandler x-httpd-php\1/' {} \;


#:771#
# commandlinefu.com by David Winterbottom

# floating point shell calculator
calc() { awk 'BEGIN { OFMT="%f"; print '"$*"'; exit}'; }

# floating point bash calculator w/o precision
b(){ echo "scale=${2:-2}; $1" | bc -l; }

# floating point operations in shell scripts
echo $((3.0/5.0))

# floating point operations in shell scripts
echo "5 k 3 5 / p" | dc

# floating point operations in shell scripts
bc -l <<< s(3/5)

# floating point operations in shell scripts
echo "scale=4; 3 / 5" | bc


#:772#
# commandlinefu.com by David Winterbottom

# purge old stale messages on a qmail queue
for i in `grep "unable to stat" /var/log/syslog | cut -d "/" -f 3 | sort | uniq`
; do find /var/qmail/queue -name $i -type f -exec rm -v {} \; ; done


#:773#
# commandlinefu.com by David Winterbottom

# Incase you miss the famous 'C:\>' prompt
export PS1='C:${PWD//\//\\\}>'

# Day Date Time>  Instead of $ or # at the terminal
export PS1='\D{%a %D %T}> '


#:774#
# commandlinefu.com by David Winterbottom

# power off system in X hours form the current time, here X=2
echo init 0 | at now + 2 hours


#:775#
# commandlinefu.com by David Winterbottom

# List all groups and the user names that were in each group
for u in `cut -f1 -d: /etc/passwd`; do echo -n $u:; groups $u; done | sort


#:776#
# commandlinefu.com by David Winterbottom

# Show account security settings
chage -l <user>


#:777#
# commandlinefu.com by David Winterbottom

# Ruby - nslookup against a list of IP`s or FQDN`s
while read n; do host $n; done < list

# Perform a reverse DNS lookup
dig -x 74.125.45.100

# DNS cache snooping
for i in `cat names.txt`; do host -r $i [nameserver]; done


#:778#
# commandlinefu.com by David Winterbottom

# Cleanup firefox's database.
find ~/Library/Application\ Support/Firefox/ -type f -name "*.sqlite" -exec sqli
te3 {} VACUUM \;

# Cleanup firefox's database.
find ~/.mozilla/firefox/ -type f -name "*.sqlite" -exec sqlite3 {} VACUUM \;

# Cleanup firefox's database.
pgrep -u `id -u` firefox-bin || find ~/.mozilla/firefox -name '*.sqlite'|(while
read -e f; do echo 'vacuum;'|sqlite3 "$f" ; done)


#:779#
# commandlinefu.com by David Winterbottom

# Transfer sqlite3 data to mysql
sqlite3 mydb.sqlite3 '.dump' | grep -vE '^(BEGIN|COMMIT|CREATE|DELETE)|"sqlite_s
equence"' | sed -r 's/"([^"]+)"/`\1`/' | tee mydb.sql | mysql -p mydb

# Cleanup firefox's database.
find ~/Library/Application\ Support/Firefox/ -type f -name "*.sqlite" -exec sqli
te3 {} VACUUM \;

# Cleanup firefox's database.
find ~/.mozilla/firefox/ -type f -name "*.sqlite" -exec sqlite3 {} VACUUM \;

# Cleanup firefox's database.
pgrep -u `id -u` firefox-bin || find ~/.mozilla/firefox -name '*.sqlite'|(while
read -e f; do echo 'vacuum;'|sqlite3 "$f" ; done)


#:780#
# commandlinefu.com by David Winterbottom

# watch iptables counters
watch --interval 0 'iptables -nvL | grep -v "0     0"'


#:781#
# commandlinefu.com by David Winterbottom

# Print a row of 50 hyphens
perl -le'print"-"x50'

# Print a row of 50 hyphens
jot -s '' -b '-' 50

# Print a random 8 digit number
jot -s '' -r -n 8 0 9

# Print a random 8 digit number
jot -r -n 8 0 9 | rs -g 0


#:782#
# commandlinefu.com by David Winterbottom

# Print a random 8 digit number
jot -s '' -r -n 8 0 9

# Print a random 8 digit number
jot -r -n 8 0 9 | rs -g 0


#:783#
# commandlinefu.com by David Winterbottom

# one-liner mpc track changer using dmenu
mpc play $(sed -n "s@^[ >]\([0-9]\+\)) $(mpc playlist|cut -d' ' -f3-|dmenu -i -p
 'song name'||echo void)@\1@p" < <(mpc playlist))

# Download Youtube Playlist
y=http://www.youtube.com;for i in $(curl -s $f|grep -o "url='$y/watch?v=[^']*'")
;do d=$(echo $i|sed "s;url\='$y/watch?v=\(.*\)';\1;");wget -O $d.flv "$y/get_vid
eo.php?video_id=$d&t=$(curl -s "$y/watch?v=$d"|sed -n 's/.*, "t": "\([^"]*\)", .
*/\1/p')";done


#:784#
# commandlinefu.com by David Winterbottom

# Get number of diggs for a news URL
curl -s "http://services.digg.com/stories?link=$NEWSURL&appkey=http://www.whatev
er.com&type=json"  | python -m simplejson.tool | grep diggs


#:785#
# commandlinefu.com by David Winterbottom

# Resolve the "all display buffers are busy, please try later" error on a Foundr
y
dm display-buffer reset


#:786#
# commandlinefu.com by David Winterbottom

# Resolve the "all display buffers are busy, please try later" error on a Foundr
y
dm display-buffer reset


#:787#
# commandlinefu.com by David Winterbottom


#:788#
# commandlinefu.com by David Winterbottom

# Download all the Super Mario World Hacks from smwcentral.net
smw=http://www.smwcentral.net;for f in $(curl -s "$smw/?p=hacks"|grep -o "downlo
ad.php?id=[0-9]*&amp;type=hack"); do i=$(echo $f|sed "s/download.php?id=\([0-9]*
\)&amp;type=hack/\1/");wget -O $i "$smw/download.php?id=$id&type=hack";unzip -qq
o $i;rm $i;done


#:789#
# commandlinefu.com by David Winterbottom

# convert unixtime to human-readable
perl -e 'print scalar(gmtime(1234567890)), "\n"'

# convert unixtime to human-readable
echo "0t${currentEpoch}=Y" | /usr/bin/adb


#:790#
# commandlinefu.com by David Winterbottom

# List all available commands (bash, ksh93)
printf "%s\n" ${PATH//:/\/* }

# List all available commands
in bash hit "tab" twice and answer y

# Get the absolute path of a file
absolute_path () { readlink -f "$1"; };

# Add the sbin directories to your PATH if it doesn't already exist in ZSH.
path+=( /sbin /usr/sbin /usr/local/sbin ); path=( ${(u)path} );

# Get absolut path to your bash-script
script_path=$(cd $(dirname $0);pwd)

# Show Directories in the PATH Which does NOT Exist
(IFS=:;for p in $PATH; do test -d $p || echo $p; done)

# Show only existing executable dirs in PATH using only builtin bash commands
for p in ${PATH//:/ }; do [[ -d $p && -x $p ]] && echo $p; done

# search for a file in PATH
type <filename>

# search for a file in PATH
which <filename>

# search for a file in PATH
for L in `echo :$PATH | tr : '\n'`; do F=${L:-"."}/fileName; if [ -f ${F} -o -h
${F} ]; then echo ${F}; break; fi; done

# search for a file in PATH
function sepath { echo $PATH |tr ":" "\n" |sort -u |while read L ; do cd "$L" 2>
/dev/null && find . \( ! -name . -prune \) \( -type f -o -type l \) 2>/dev/null
|sed "s@^\./@@" |egrep -i "${*}" |sed "s@^@$L/@" ; done ; }

# find files in $PATH that were not installed through dpkg
echo -e "${PATH//://\n}" >/tmp/allpath; grep -Fh -f /tmp/allpath /var/lib/dpkg/i
nfo/*.list|grep -vxh -f /tmp/allpath >/tmp/installedinpath ; find ${PATH//:/ } |
grep -Fxv -f /tmp/installedinpath

# Show directories in the PATH, one per line
echo src::${PATH} | awk 'BEGIN{pwd=ENVIRON["PWD"];RS=":";FS="\n"}!$1{$1=pwd}$1!~
/^\//{$1=pwd"/"$1}{print $1}'

# Show directories in the PATH, one per line
echo $PATH | tr \: \\n

# Show directories in the PATH, one per line
print -l $path

# Show directories in the PATH, one per line
echo "${PATH//:/$'\n'}"


#:791#
# commandlinefu.com by David Winterbottom

# Download all the Super Mario World Hacks from smwcentral.net
smw=http://www.smwcentral.net;for f in $(curl -s "$smw/?p=hacks"|grep -o "downlo
ad.php?id=[0-9]*&amp;type=hack"); do i=$(echo $f|sed "s/download.php?id=\([0-9]*
\)&amp;type=hack/\1/");wget -O $i "$smw/download.php?id=$id&type=hack";unzip -qq
o $i;rm $i;done


#:792#
# commandlinefu.com by David Winterbottom

# Download all the Super Mario World Hacks from smwcentral.net
smw=http://www.smwcentral.net;for f in $(curl -s "$smw/?p=hacks"|grep -o "downlo
ad.php?id=[0-9]*&amp;type=hack"); do i=$(echo $f|sed "s/download.php?id=\([0-9]*
\)&amp;type=hack/\1/");wget -O $i "$smw/download.php?id=$id&type=hack";unzip -qq
o $i;rm $i;done


#:793#
# commandlinefu.com by David Winterbottom

# Download all the Super Mario World Hacks from smwcentral.net
smw=http://www.smwcentral.net;for f in $(curl -s "$smw/?p=hacks"|grep -o "downlo
ad.php?id=[0-9]*&amp;type=hack"); do i=$(echo $f|sed "s/download.php?id=\([0-9]*
\)&amp;type=hack/\1/");wget -O $i "$smw/download.php?id=$id&type=hack";unzip -qq
o $i;rm $i;done


#:794#
# commandlinefu.com by David Winterbottom

# Download a TiVo Show
curl -s -c /tmp/cookie -k -u tivo:$MAK --digest "$(curl -s -c /tmp/cookie -k -u
tivo:$MAK --digest https://$tivo/nowplaying/index.html | sed 's;.*<a href="\([^"
]*\)">Download MPEG-PS</a>.*;\1;' | sed 's|\&amp;|\&|')" | tivodecode -m $MAK --
 - > tivo.mpg

# Download all the Super Mario World Hacks from smwcentral.net
smw=http://www.smwcentral.net;for f in $(curl -s "$smw/?p=hacks"|grep -o "downlo
ad.php?id=[0-9]*&amp;type=hack"); do i=$(echo $f|sed "s/download.php?id=\([0-9]*
\)&amp;type=hack/\1/");wget -O $i "$smw/download.php?id=$id&type=hack";unzip -qq
o $i;rm $i;done


#:795#
# commandlinefu.com by David Winterbottom

# Unlock your KDE4.3 session remotely
qdbus org.kde.screenlocker /MainApplication quit


#:796#
# commandlinefu.com by David Winterbottom

# Unlock your KDE4.3 session remotely
qdbus org.kde.screenlocker /MainApplication quit


#:797#
# commandlinefu.com by David Winterbottom

# Unlock your KDE4.3 session remotely
qdbus org.kde.screenlocker /MainApplication quit


#:798#
# commandlinefu.com by David Winterbottom


#:799#
# commandlinefu.com by David Winterbottom


#:800#
# commandlinefu.com by David Winterbottom

# securely locate file and dir
slocate filename/dirname


#:801#
# commandlinefu.com by David Winterbottom

# google search
perl -e '$i=0;while($i<10){open(WGET,qq/|xargs lynx -dump/);printf WGET qq{http:
//www.google.com/search?q=site:g33kinfo.com&hl=en&start=$i&sa=N},$i+=10}'|grep '
\/\/g33kinfo.com\/'

# Seach google from the command line in Unofficial google shell
http://goosh.org

# how to run firefox in safe mode from command line
firefox --safe-mode


#:802#
# commandlinefu.com by David Winterbottom

# floating point operations in shell scripts
echo "5 k 3 5 / p" | dc


#:803#
# commandlinefu.com by David Winterbottom

# Add user to group on OS X 10.5
sudo dscl localhost -append /Local/Default/Groups/admin GroupMembership username


#:804#
# commandlinefu.com by David Winterbottom

# Change Title of Terminal Window to Verbose Info useful at Login
echo -ne "\033]0;`id -un`:`id -gn`@`hostname||uname -n|sed 1q` `who -m|sed -e "s
%^.* \(pts/[0-9]*\).*(\(.*\))%[\1] (\2)%g"` [`uptime|sed -e "s/.*: \([^,]*\).*/\
1/" -e "s/ //g"` / `ps aux|wc -l`]\007"

# Add user to group on OS X 10.5
sudo dscl localhost -append /Local/Default/Groups/admin GroupMembership username


#:805#
# commandlinefu.com by David Winterbottom

# Chage default shell for all users [FreeBSD]
cd /usr/home && for i in *;do chsh -s bash $i;done

# Add user to group on OS X 10.5
sudo dscl localhost -append /Local/Default/Groups/admin GroupMembership username


#:806#
# commandlinefu.com by David Winterbottom

# Run a bash script in debug mode, show output and save it on a file
bash -x test.sh 2>&1 | tee out.test


#:807#
# commandlinefu.com by David Winterbottom


#:808#
# commandlinefu.com by David Winterbottom

# How to watch files
watch -d 'ls -l'

# How to know the total number of packages available
apt-cache stats


#:809#
# commandlinefu.com by David Winterbottom

# badblocks for floppy
/sbin/badblocks -v /dev/fd0 1440


#:810#
# commandlinefu.com by David Winterbottom

# Update Ping.fm status
curl -d api_key="$api_key" -d user_app_key="$user_app_key -d body="$body" -d pos
t_method="default" http://api.ping.fm/v1/user.post


#:811#
# commandlinefu.com by David Winterbottom

# Update Ping.fm status
curl -d api_key="$api_key" -d user_app_key="$user_app_key -d body="$body" -d pos
t_method="default" http://api.ping.fm/v1/user.post


#:812#
# commandlinefu.com by David Winterbottom

# Add another tty device using mknod command
sudo mknod /dev/ttyS4 c 4 68


#:813#
# commandlinefu.com by David Winterbottom

# Add another tty device using mknod command
sudo mknod /dev/ttyS4 c 4 68


#:814#
# commandlinefu.com by David Winterbottom

# Show display adapter, available drivers, and driver in use
lspci -v | perl -ne '/VGA/../^$/  and /VGA|Kern/ and print'


#:815#
# commandlinefu.com by David Winterbottom

# alias to close terminal with :q
alias ':q'='exit'


#:816#
# commandlinefu.com by David Winterbottom

# Put the machine to sleep after the download(wget) is done
while [ -n "`pgrep wget`" ]; do sleep 2 ;done; [ -e "/tmp/nosleep"] || echo  mem
 >/sys/power/state


#:817#
# commandlinefu.com by David Winterbottom

# Transfer sqlite3 data to mysql
sqlite3 mydb.sqlite3 '.dump' | grep -vE '^(BEGIN|COMMIT|CREATE|DELETE)|"sqlite_s
equence"' | sed -r 's/"([^"]+)"/`\1`/' | tee mydb.sql | mysql -p mydb

# Dump dvd from a different machine onto this one.
ssh user@machine_A dd if=/dev/dvd0 > dvddump.iso

# Hexadecimal dump of a file, pipe, or anything
cat testfile | hexdump -C


#:818#
# commandlinefu.com by David Winterbottom

# Check your unread Gmail from the command line
curl -u username --silent "https://mail.google.com/mail/feed/atom" | perl -ne 'p
rint "\t" if /<name>/; print "$2\n" if /<(title|name)>(.*)<\/\1>/;'

# Check your unread Gmail from the command line
curl -u username:password --silent "https://mail.google.com/mail/feed/atom" | tr
 -d '\n' | awk -F '<entry>' '{for (i=2; i<=NF; i++) {print $i}}' | sed -n "s/<ti
tle>\(.*\)<\/title.*name>\(.*\)<\/name>.*/\2 - \1/p"


#:819#
# commandlinefu.com by David Winterbottom

# Detect encoding of a text file
file -i <textfile>


#:820#
# commandlinefu.com by David Winterbottom

# Easy and fast access to often executed commands that are very long and complex
.
some_very_long_and_complex_command # label


#:821#
# commandlinefu.com by David Winterbottom

# show current directory
xdg-open .


#:822#
# commandlinefu.com by David Winterbottom

# Search through files, ignoring .svn
ack -ai 'searchterm'


#:823#
# commandlinefu.com by David Winterbottom

# When need to compress the Zope Database
python fsrecovery.py -P 0 -f <path-to-instance>/Data.fs <path-to-instance-destin
ation>/Data.fs.packed


#:824#
# commandlinefu.com by David Winterbottom


#:825#
# commandlinefu.com by David Winterbottom

# search for a file in PATH
type <filename>

# search for a file in PATH
which <filename>

# search for a file in PATH
for L in `echo :$PATH | tr : '\n'`; do F=${L:-"."}/fileName; if [ -f ${F} -o -h
${F} ]; then echo ${F}; break; fi; done


#:826#
# commandlinefu.com by David Winterbottom

# Extract all urls from last firefox sessionstore used in a portable way.
perl -lne 'print for /url":"\K[^"]+/g' $(ls -t ~/.mozilla/firefox/*/sessionstore
.js | sed q)

# Perform sed substitution on all but the last line of input
sed -e "$ ! s/$/,/"

# Print text string vertically, one character per line.
echo "vertical text" | fold -1

# Print text string vertically, one character per line.
echo "vertical text" | grep -o '.'


#:827#
# commandlinefu.com by David Winterbottom

# DVD to YouTube ready watermarked MPEG-4 AVI file using mencoder (step 2)
mencoder -sub heading.ssa -subpos 0 -subfont-text-scale 4 -utf8 -oac copy -ovc l
avc -lavcopts vcodec=mpeg4 -vf scale=320:-2,expand=:240:::1 -ffourcc xvid -o out
put.avi dvd.avi

# Use heading subtitle file as watermark using mencoder
mencoder -sub heading.ssa -subpos 0 -subfont-text-scale 4 -utf8 -oac mp3lame -la
meopts cbr=128 -ovc lavc -lavcopts vcodec=mjpeg -vf scale=320:-2,expand=:240:::1
 -o output.avi input.flv

# Record audio and video from webcam using mencoder
mencoder tv:// -tv driver=v4l2:width=800:height=600:device=/dev/video0:fps=30:ou
tfmt=yuy2:forceaudio:alsa:adevice=hw.2,0 -ovc lavc -lavcopts vcodec=mpeg4:vbitra
te=1800 -ffourcc xvid -oac mp3lame -lameopts cbr=128 -o output.avi

# Record audio and video from webcam using ffmpeg
ffmpeg -f alsa -r 16000 -i hw:2,0 -f video4linux2 -s 800x600 -i /dev/video0 -r 3
0 -f avi -vcodec mpeg4 -vtag xvid -sameq -acodec libmp3lame -ab 96k output.avi

# FLV to AVI with subtitles and forcing audio sync using mencoder
mencoder -sub subs.ssa -utf8 -subfont-text-scale 4 -oac mp3lame -lameopts cbr=12
8 -ovc lavc -lavcopts vcodec=mpeg4 -ffourcc xvid -o output.avi input.flv


#:828#
# commandlinefu.com by David Winterbottom

# DVD to YouTube ready watermarked MPEG-4 AVI file using mencoder (step 2)
mencoder -sub heading.ssa -subpos 0 -subfont-text-scale 4 -utf8 -oac copy -ovc l
avc -lavcopts vcodec=mpeg4 -vf scale=320:-2,expand=:240:::1 -ffourcc xvid -o out
put.avi dvd.avi

# Rip DVD to YouTube ready MPEG-4 AVI file using mencoder
mencoder -oac mp3lame -lameopts cbr=128 -ovc lavc -lavcopts vcodec=mpeg4 -ffourc
c xvid -vf scale=320:-2,expand=:240:::1 -o output.avi dvd://0

# Use heading subtitle file as watermark using mencoder
mencoder -sub heading.ssa -subpos 0 -subfont-text-scale 4 -utf8 -oac mp3lame -la
meopts cbr=128 -ovc lavc -lavcopts vcodec=mjpeg -vf scale=320:-2,expand=:240:::1
 -o output.avi input.flv

# Record audio and video from webcam using mencoder
mencoder tv:// -tv driver=v4l2:width=800:height=600:device=/dev/video0:fps=30:ou
tfmt=yuy2:forceaudio:alsa:adevice=hw.2,0 -ovc lavc -lavcopts vcodec=mpeg4:vbitra
te=1800 -ffourcc xvid -oac mp3lame -lameopts cbr=128 -o output.avi

# Record audio and video from webcam using ffmpeg
ffmpeg -f alsa -r 16000 -i hw:2,0 -f video4linux2 -s 800x600 -i /dev/video0 -r 3
0 -f avi -vcodec mpeg4 -vtag xvid -sameq -acodec libmp3lame -ab 96k output.avi

# FLV to AVI with subtitles and forcing audio sync using mencoder
mencoder -sub subs.ssa -utf8 -subfont-text-scale 4 -oac mp3lame -lameopts cbr=12
8 -ovc lavc -lavcopts vcodec=mpeg4 -ffourcc xvid -o output.avi input.flv


#:829#
# commandlinefu.com by David Winterbottom

# Use heading subtitle file as watermark using mencoder
mencoder -sub heading.ssa -subpos 0 -subfont-text-scale 4 -utf8 -oac mp3lame -la
meopts cbr=128 -ovc lavc -lavcopts vcodec=mjpeg -vf scale=320:-2,expand=:240:::1
 -o output.avi input.flv

# FLV to AVI with subtitles and forcing audio sync using mencoder
mencoder -sub subs.ssa -utf8 -subfont-text-scale 4 -oac mp3lame -lameopts cbr=12
8 -ovc lavc -lavcopts vcodec=mpeg4 -ffourcc xvid -o output.avi input.flv


#:830#
# commandlinefu.com by David Winterbottom

# find only current directory (universal)
find . \( ! -name . -prune \) \( -type f -o -type l \)


#:831#
# commandlinefu.com by David Winterbottom

# send echo to socket network
echo foo | netcat 192.168.1.2 25

# send echo to socket network
echo "foo" > /dev/tcp/192.168.1.2/25


#:832#
# commandlinefu.com by David Winterbottom

# Get the time from NIST.GOV
cat </dev/tcp/time.nist.gov/13

# retrieve the source address used to contact a given host
python -c 'import socket;  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
; s.connect(("<hostname>", <port>)); print s.getsockname()[0] ; s.close() ;' 2>
/dev/null

# send echo to socket network
echo foo | netcat 192.168.1.2 25

# send echo to socket network
echo "foo" > /dev/tcp/192.168.1.2/25


#:833#
# commandlinefu.com by David Winterbottom

# send echo to socket network
echo foo | netcat 192.168.1.2 25

# send echo to socket network
echo "foo" > /dev/tcp/192.168.1.2/25


#:834#
# commandlinefu.com by David Winterbottom

# send echo to socket network
echo foo | netcat 192.168.1.2 25

# send echo to socket network
echo "foo" > /dev/tcp/192.168.1.2/25


#:835#
# commandlinefu.com by David Winterbottom

# retrieve the source address used to contact a given host
python -c 'import socket;  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
; s.connect(("<hostname>", <port>)); print s.getsockname()[0] ; s.close() ;' 2>
/dev/null

# send echo to socket network
echo foo | netcat 192.168.1.2 25

# send echo to socket network
echo "foo" > /dev/tcp/192.168.1.2/25


#:836#
# commandlinefu.com by David Winterbottom

# preprocess code to be posted in comments on this site
sed 's/^/$ /' "$script" | xclip


#:837#
# commandlinefu.com by David Winterbottom

# Extract audio from Mythtv recording to Rockbox iPod using ffmpeg
ffmpeg -ss 0:58:15 -i DavidLettermanBlackCrowes.mpg -acodec copy DavidLettermanB
lackCrowes.ac3


#:838#
# commandlinefu.com by David Winterbottom

# Find iPod's fwguid
lsusb -v | grep -o "[0-9A-Z]{16}"

# Extract audio from Mythtv recording to Rockbox iPod using ffmpeg
ffmpeg -ss 0:58:15 -i DavidLettermanBlackCrowes.mpg -acodec copy DavidLettermanB
lackCrowes.ac3


#:839#
# commandlinefu.com by David Winterbottom

# Extract audio from Mythtv recording to Rockbox iPod using ffmpeg
ffmpeg -ss 0:58:15 -i DavidLettermanBlackCrowes.mpg -acodec copy DavidLettermanB
lackCrowes.ac3


#:840#
# commandlinefu.com by David Winterbottom

# View the newest xkcd comic.
wget `lynx --dump http://xkcd.com/|grep png`

# View the newest xkcd comic.
curl -s 'xkcd.com' | awk -F\" '/^<img/{printf("<?xml version=\"1.0\"?>\n<xkcd>\n
<item>\n <title>%s</title>\n <comment>%s</comment>\n <image>%s</image>\n</item>\
n</xkcd>\n", $6, $4, $2)}'

# View the newest xkcd comic.
lynx --dump --source http://www.xkcd.com | grep `lynx --dump http://www.xkcd.com
 | egrep '(png|jpg)'` | grep title | cut -d = -f2,3 | cut -d '"' -f2,4 | sed -e
's/"/|/g' | awk -F"|" ' { system("display " $1);system("echo "$2); } '

# View the newest xkcd comic.
xkcd(){ local f=$(curl -s http://xkcd.com/);display $(echo "$f"|grep -Po '(?<=")
http://imgs.xkcd.com/comics/[^"]+(png|jpg)');echo "$f"|awk '/<img src="http:\/\/
imgs\.xkcd\.com\/comics\/.*?" title=.*/{gsub(/^.*title=.|".*?$/,"");print}';}

# random xkcd comic
display "$(wget -q http://dynamic.xkcd.com/comic/random/ -O - | grep -Po '(?<=")
http://imgs.xkcd.com/comics/[^"]+(png|jpg)')"


#:841#
# commandlinefu.com by David Winterbottom

# Record MP3 audio via ALSA using ffmpeg
ffmpeg -f alsa -ac 2 -i hw:1,0 -acodec libmp3lame -ab 96k output.mp3

# Record audio and video from webcam using ffmpeg
ffmpeg -f alsa -r 16000 -i hw:2,0 -f video4linux2 -s 800x600 -i /dev/video0 -r 3
0 -f avi -vcodec mpeg4 -vtag xvid -sameq -acodec libmp3lame -ab 96k output.avi


#:842#
# commandlinefu.com by David Winterbottom

# View webcam output using GStreamer pipeline
gst-launch-0.10 autovideosrc ! video/x-raw-yuv,framerate=\(fraction\)30/1,width=
640,height=480 ! ffmpegcolorspace ! autovideosink


#:843#
# commandlinefu.com by David Winterbottom

# Substitution cipher
echo "Decode this"| tr [a-zA-Z] $(echo {a..z} {A..Z}|grep -o .|sort -R|tr -d "\n
 ")


#:844#
# commandlinefu.com by David Winterbottom

# Substitution cipher
echo "Decode this"| tr [a-zA-Z] $(echo {a..z} {A..Z}|grep -o .|sort -R|tr -d "\n
 ")


#:845#
# commandlinefu.com by David Winterbottom

# Show only existing executable dirs in PATH using only builtin bash commands
for p in ${PATH//:/ }; do [[ -d $p && -x $p ]] && echo $p; done


#:846#
# commandlinefu.com by David Winterbottom

# Show only existing executable dirs in PATH using only builtin bash commands
for p in ${PATH//:/ }; do [[ -d $p && -x $p ]] && echo $p; done


#:847#
# commandlinefu.com by David Winterbottom

# Output Detailed Process Tree for any User
psu(){ command ps -Hcl -F S f -u ${1:-$USER}; }

# Unbelievable Shell Colors, Shading, Backgrounds, Effects for Non-X
for c in `seq 0 255`;do t=5;[[ $c -lt 108 ]]&&t=0;for i in `seq $t 5`;do echo -e
 "\e[0;48;$i;${c}m|| $i:$c `seq -s+0 $(($COLUMNS/2))|tr -d '[0-9]'`\e[0m";done;d
one

# Schedule Nice Background Commands That Won't Die on Logout - Alternative to no
hup and at
( trap '' 1; ( nice -n 19 sleep 2h && command rm -v -rf /garbage/ &>/dev/null &&
 trap 1 ) & )

# Show only existing executable dirs in PATH using only builtin bash commands
for p in ${PATH//:/ }; do [[ -d $p && -x $p ]] && echo $p; done


#:848#
# commandlinefu.com by David Winterbottom

# Change Title of Terminal Window to Verbose Info useful at Login
echo -ne "\033]0;`id -un`:`id -gn`@`hostname||uname -n|sed 1q` `who -m|sed -e "s
%^.* \(pts/[0-9]*\).*(\(.*\))%[\1] (\2)%g"` [`uptime|sed -e "s/.*: \([^,]*\).*/\
1/" -e "s/ //g"` / `ps aux|wc -l`]\007"


#:849#
# commandlinefu.com by David Winterbottom

# Change Title of Terminal Window to Verbose Info useful at Login
echo -ne "\033]0;`id -un`:`id -gn`@`hostname||uname -n|sed 1q` `who -m|sed -e "s
%^.* \(pts/[0-9]*\).*(\(.*\))%[\1] (\2)%g"` [`uptime|sed -e "s/.*: \([^,]*\).*/\
1/" -e "s/ //g"` / `ps aux|wc -l`]\007"


#:850#
# commandlinefu.com by David Winterbottom

# Change Title of Terminal Window to Verbose Info useful at Login
echo -ne "\033]0;`id -un`:`id -gn`@`hostname||uname -n|sed 1q` `who -m|sed -e "s
%^.* \(pts/[0-9]*\).*(\(.*\))%[\1] (\2)%g"` [`uptime|sed -e "s/.*: \([^,]*\).*/\
1/" -e "s/ //g"` / `ps aux|wc -l`]\007"


#:851#
# commandlinefu.com by David Winterbottom

# Change Title of Terminal Window to Verbose Info useful at Login
echo -ne "\033]0;`id -un`:`id -gn`@`hostname||uname -n|sed 1q` `who -m|sed -e "s
%^.* \(pts/[0-9]*\).*(\(.*\))%[\1] (\2)%g"` [`uptime|sed -e "s/.*: \([^,]*\).*/\
1/" -e "s/ //g"` / `ps aux|wc -l`]\007"


#:852#
# commandlinefu.com by David Winterbottom

# Output Detailed Process Tree for any User
psu(){ command ps -Hcl -F S f -u ${1:-$USER}; }

# Change Title of Terminal Window to Verbose Info useful at Login
echo -ne "\033]0;`id -un`:`id -gn`@`hostname||uname -n|sed 1q` `who -m|sed -e "s
%^.* \(pts/[0-9]*\).*(\(.*\))%[\1] (\2)%g"` [`uptime|sed -e "s/.*: \([^,]*\).*/\
1/" -e "s/ //g"` / `ps aux|wc -l`]\007"


#:853#
# commandlinefu.com by David Winterbottom

# Change Title of Terminal Window to Verbose Info useful at Login
echo -ne "\033]0;`id -un`:`id -gn`@`hostname||uname -n|sed 1q` `who -m|sed -e "s
%^.* \(pts/[0-9]*\).*(\(.*\))%[\1] (\2)%g"` [`uptime|sed -e "s/.*: \([^,]*\).*/\
1/" -e "s/ //g"` / `ps aux|wc -l`]\007"


#:854#
# commandlinefu.com by David Winterbottom

# Change Title of Terminal Window to Verbose Info useful at Login
echo -ne "\033]0;`id -un`:`id -gn`@`hostname||uname -n|sed 1q` `who -m|sed -e "s
%^.* \(pts/[0-9]*\).*(\(.*\))%[\1] (\2)%g"` [`uptime|sed -e "s/.*: \([^,]*\).*/\
1/" -e "s/ //g"` / `ps aux|wc -l`]\007"


#:855#
# commandlinefu.com by David Winterbottom

# Log your internet download speed
echo $(date +%s) > start-time; URL=http://www.google.com; while true; do echo $(
curl -L --w %{speed_download} -o/dev/null -s $URL) >> bps; sleep 10; done &


#:856#
# commandlinefu.com by David Winterbottom

# Log your internet download speed
echo $(date +%s) > start-time; URL=http://www.google.com; while true; do echo $(
curl -L --w %{speed_download} -o/dev/null -s $URL) >> bps; sleep 10; done &


#:857#
# commandlinefu.com by David Winterbottom

# Track X Window events in chosen window
xev -id `xwininfo | grep 'Window id' | awk '{print $4}'`


#:858#
# commandlinefu.com by David Winterbottom

# Track X Window events in chosen window
xev -id `xwininfo | grep 'Window id' | awk '{print $4}'`


#:859#
# commandlinefu.com by David Winterbottom

# Show apps that use internet connection at the moment. (Multi-Language)
ss -p


#:860#
# commandlinefu.com by David Winterbottom

# View a sopcast stream
(sp-sc sop://broker.sopcast.com:3912/6002 3900 8900 &>/dev/null &); sleep 10; mp
layer http://localhost:8900/tv.asf


#:861#
# commandlinefu.com by David Winterbottom

# View a sopcast stream
(sp-sc sop://broker.sopcast.com:3912/6002 3900 8900 &>/dev/null &); sleep 10; mp
layer http://localhost:8900/tv.asf


#:862#
# commandlinefu.com by David Winterbottom

# Adding Color Escape Codes to global CC array for use by echo -e
declare -ax CC; for i in `seq 0 7`;do ii=$(($i+7)); CC[$i]="\033[1;3${i}m"; CC[$
ii]="\033[0;3${i}m"; done


#:863#
# commandlinefu.com by David Winterbottom

# Unbelievable Shell Colors, Shading, Backgrounds, Effects for Non-X
for c in `seq 0 255`;do t=5;[[ $c -lt 108 ]]&&t=0;for i in `seq $t 5`;do echo -e
 "\e[0;48;$i;${c}m|| $i:$c `seq -s+0 $(($COLUMNS/2))|tr -d '[0-9]'`\e[0m";done;d
one

# Remove color codes (special characters) with sed
sed -r "s/\x1B\[([0-9]{1,3}((;[0-9]{1,3})*)?)?[m|K]//g

# Adding Color Escape Codes to global CC array for use by echo -e
declare -ax CC; for i in `seq 0 7`;do ii=$(($i+7)); CC[$i]="\033[1;3${i}m"; CC[$
ii]="\033[0;3${i}m"; done


#:864#
# commandlinefu.com by David Winterbottom

# Unbelievable Shell Colors, Shading, Backgrounds, Effects for Non-X
for c in `seq 0 255`;do t=5;[[ $c -lt 108 ]]&&t=0;for i in `seq $t 5`;do echo -e
 "\e[0;48;$i;${c}m|| $i:$c `seq -s+0 $(($COLUMNS/2))|tr -d '[0-9]'`\e[0m";done;d
one

# Remove color codes (special characters) with sed
sed -r "s/\x1B\[([0-9]{1,3}((;[0-9]{1,3})*)?)?[m|K]//g

# Adding Color Escape Codes to global CC array for use by echo -e
declare -ax CC; for i in `seq 0 7`;do ii=$(($i+7)); CC[$i]="\033[1;3${i}m"; CC[$
ii]="\033[0;3${i}m"; done


#:865#
# commandlinefu.com by David Winterbottom

# Unbelievable Shell Colors, Shading, Backgrounds, Effects for Non-X
for c in `seq 0 255`;do t=5;[[ $c -lt 108 ]]&&t=0;for i in `seq $t 5`;do echo -e
 "\e[0;48;$i;${c}m|| $i:$c `seq -s+0 $(($COLUMNS/2))|tr -d '[0-9]'`\e[0m";done;d
one

# Adding Color Escape Codes to global CC array for use by echo -e
declare -ax CC; for i in `seq 0 7`;do ii=$(($i+7)); CC[$i]="\033[1;3${i}m"; CC[$
ii]="\033[0;3${i}m"; done


#:866#
# commandlinefu.com by David Winterbottom

# Clean your broken terminal
stty sane

# Adding Color Escape Codes to global CC array for use by echo -e
declare -ax CC; for i in `seq 0 7`;do ii=$(($i+7)); CC[$i]="\033[1;3${i}m"; CC[$
ii]="\033[0;3${i}m"; done


#:867#
# commandlinefu.com by David Winterbottom

# Adding Color Escape Codes to global CC array for use by echo -e
declare -ax CC; for i in `seq 0 7`;do ii=$(($i+7)); CC[$i]="\033[1;3${i}m"; CC[$
ii]="\033[0;3${i}m"; done


#:868#
# commandlinefu.com by David Winterbottom

# Function that outputs dots every second until command completes
sleeper(){ while `ps -p $1 &>/dev/null`; do echo -n "${2:-.}"; sleep ${3:-1}; do
ne; }; export -f sleeper


#:869#
# commandlinefu.com by David Winterbottom

# DVD to YouTube ready watermarked MPEG-4 AVI file using mencoder (step 2)
mencoder -sub heading.ssa -subpos 0 -subfont-text-scale 4 -utf8 -oac copy -ovc l
avc -lavcopts vcodec=mpeg4 -vf scale=320:-2,expand=:240:::1 -ffourcc xvid -o out
put.avi dvd.avi

# Use heading subtitle file as watermark using mencoder
mencoder -sub heading.ssa -subpos 0 -subfont-text-scale 4 -utf8 -oac mp3lame -la
meopts cbr=128 -ovc lavc -lavcopts vcodec=mjpeg -vf scale=320:-2,expand=:240:::1
 -o output.avi input.flv

# FLV to AVI with subtitles and forcing audio sync using mencoder
mencoder -sub subs.ssa -utf8 -subfont-text-scale 4 -oac mp3lame -lameopts cbr=12
8 -ovc lavc -lavcopts vcodec=mpeg4 -ffourcc xvid -o output.avi input.flv


#:870#
# commandlinefu.com by David Winterbottom

# Use heading subtitle file as watermark using mencoder
mencoder -sub heading.ssa -subpos 0 -subfont-text-scale 4 -utf8 -oac mp3lame -la
meopts cbr=128 -ovc lavc -lavcopts vcodec=mjpeg -vf scale=320:-2,expand=:240:::1
 -o output.avi input.flv


#:871#
# commandlinefu.com by David Winterbottom

# List all text files (exclude binary files)
find . -type f -exec file {} \; | grep ".*: .* text" | cut -f 1 -d :

# List all text files (exclude binary files)
find . | xargs file | grep ".*: .* text" | sed "s;\(.*\): .* text.*;\1;"


#:872#
# commandlinefu.com by David Winterbottom

# Go get those photos from a Picasa album
wget 'link of a Picasa WebAlbum' -O - |perl -e'while(<>){while(s/"media":{"conte
nt":\[{"url":"(.+?\.JPG)//){print "$1\n"}}' |wget -w1 -i -

# Go get those photos from a Picasa album
echo 'Enter Picasa album RSS URL:"; read -e feedurl; GET "$feedurl" |sed 's/</\n
</g' | grep media:content |sed 's/.*url='"'"'\([^'"'"']*\)'"'"'.*$/\1/' > wgetli
st


#:873#
# commandlinefu.com by David Winterbottom

# Convert mp3/wav file to asterisk ulaw for music on hold (moh)
sox -v 0.125 -V <mp3.mp3> -t au -r 8000 -U -b -c 1 <ulaw.ulaw> resample -ql


#:874#
# commandlinefu.com by David Winterbottom

# Convert mp3/wav file to asterisk ulaw for music on hold (moh)
sox -v 0.125 -V <mp3.mp3> -t au -r 8000 -U -b -c 1 <ulaw.ulaw> resample -ql


#:875#
# commandlinefu.com by David Winterbottom

# Execute a command with a timeout
timeout 10 sleep 11


#:876#
# commandlinefu.com by David Winterbottom

# Show current pathname in title of terminal
export PROMPT_COMMAND='echo -ne "\033]0;${PWD/#$HOME/~}\007";'


#:877#
# commandlinefu.com by David Winterbottom

# dolphins on the desktop (compiz)
xwinwrap -ni -argb -fs -s -st -sp -nf -b -- /usr/libexec/xscreensaver/atlantis -
count 20 -window-id WID &


#:878#
# commandlinefu.com by David Winterbottom

# Quick command line math
expr 512 \* 7


#:879#
# commandlinefu.com by David Winterbottom

# Quick command line math
expr 512 \* 7


#:880#
# commandlinefu.com by David Winterbottom

# 32 bits or 64 bits?
sudo lshw -C cpu|grep width


#:881#
# commandlinefu.com by David Winterbottom

# Use colordiff in side-by-side mode, and with automatic column widths.
colordiff -yW"`tput cols`" /path/to/file1 /path/to/file2

# svn diff $* | colordiff | lv -c
svn diff $* | colordiff | lv -c


#:882#
# commandlinefu.com by David Winterbottom

# svn diff $* | colordiff | lv -c
svn diff $* | colordiff | lv -c


#:883#
# commandlinefu.com by David Winterbottom

# Port scan a range of hosts with Netcat.
for i in {21..29}; do nc -v -n -z -w 1 192.168.0.$i 443; done


#:884#
# commandlinefu.com by David Winterbottom

# Record microphone input and output to date stamped mp3 file
arecord -q -f cd -r 44100 -c2 -t raw | lame -S -x -h -b 128 - `date +%Y%m%d%H%M`
.mp3


#:885#
# commandlinefu.com by David Winterbottom

# Record microphone input and output to date stamped mp3 file
arecord -q -f cd -r 44100 -c2 -t raw | lame -S -x -h -b 128 - `date +%Y%m%d%H%M`
.mp3


#:886#
# commandlinefu.com by David Winterbottom

# List Network Tools in Linux
apropos network |more


#:887#
# commandlinefu.com by David Winterbottom

# List Network Tools in Linux
apropos network |more


#:888#
# commandlinefu.com by David Winterbottom

# Get all members from one AD group and put them in another AD group
for /F "DELIMS=""" %i in ('dsquery group -name SourceGroupName ^| dsget group -m
embers') do dsquery group -name TargetGroupName | dsmod group -addmbr %i


#:889#
# commandlinefu.com by David Winterbottom

# Create a single-use TCP proxy with debug output to stderr
socat -v tcp4-l:<port> tcp4:<host>:<port>


#:890#
# commandlinefu.com by David Winterbottom

# Compression formats Benchmark
for a in bzip2 lzma gzip;do echo -n>$a;for b in $(seq 0 256);do dd if=/dev/zero
of=$b.zero bs=$b count=1;c=$(date +%s%N);$a $b.zero;d=$(date +%s%N);total=$(echo
 $d-$c|bc);echo $total>>$a;rm $b.zero *.bz2 *.lzma *.gz;done;done

# Log a command's votes
while true; do curl -s http://www.commandlinefu.com/commands/view/3643/log-a-com
mands-votes | grep 'id="num-votes-' | sed 's;.*id="num-votes-[0-9]*">\([0-9\-]*\
)</div>;\1;' >> votes; sleep 10; done


#:891#
# commandlinefu.com by David Winterbottom

# Log a command's votes
while true; do curl -s http://www.commandlinefu.com/commands/view/3643/log-a-com
mands-votes | grep 'id="num-votes-' | sed 's;.*id="num-votes-[0-9]*">\([0-9\-]*\
)</div>;\1;' >> votes; sleep 10; done


#:892#
# commandlinefu.com by David Winterbottom

# Watch a TiVo File On Your Computer
curl -s -c /tmp/cookie -k -u tivo:$MAK --digest http://$tivo/download/$filename
| tivodecode -m $MAK -- - | mplayer - -cache-min 50 -cache 65536

# Download a TiVo Show
curl -s -c /tmp/cookie -k -u tivo:$MAK --digest "$(curl -s -c /tmp/cookie -k -u
tivo:$MAK --digest https://$tivo/nowplaying/index.html | sed 's;.*<a href="\([^"
]*\)">Download MPEG-PS</a>.*;\1;' | sed 's|\&amp;|\&|')" | tivodecode -m $MAK --
 - > tivo.mpg


#:893#
# commandlinefu.com by David Winterbottom

# Download a TiVo Show
curl -s -c /tmp/cookie -k -u tivo:$MAK --digest "$(curl -s -c /tmp/cookie -k -u
tivo:$MAK --digest https://$tivo/nowplaying/index.html | sed 's;.*<a href="\([^"
]*\)">Download MPEG-PS</a>.*;\1;' | sed 's|\&amp;|\&|')" | tivodecode -m $MAK --
 - > tivo.mpg


#:894#
# commandlinefu.com by David Winterbottom

# Download a TiVo Show
curl -s -c /tmp/cookie -k -u tivo:$MAK --digest "$(curl -s -c /tmp/cookie -k -u
tivo:$MAK --digest https://$tivo/nowplaying/index.html | sed 's;.*<a href="\([^"
]*\)">Download MPEG-PS</a>.*;\1;' | sed 's|\&amp;|\&|')" | tivodecode -m $MAK --
 - > tivo.mpg


#:895#
# commandlinefu.com by David Winterbottom

# Install a LAMP server in a Debian based distribution
sudo tasksel install lamp-server


#:896#
# commandlinefu.com by David Winterbottom

# Install a LAMP server in a Debian based distribution
sudo tasksel install lamp-server


#:897#
# commandlinefu.com by David Winterbottom

# Install a LAMP server in a Debian based distribution
sudo tasksel install lamp-server


#:898#
# commandlinefu.com by David Winterbottom


#:899#
# commandlinefu.com by David Winterbottom

# Change user, assume environment, stay in current dir
su -- user


#:900#
# commandlinefu.com by David Winterbottom

# Perform a reverse DNS lookup
dig -x 74.125.45.100


#:901#
# commandlinefu.com by David Winterbottom

# Perform a reverse DNS lookup
dig -x 74.125.45.100


#:902#
# commandlinefu.com by David Winterbottom

# Open your application to a specific size and location
command -geometry 120x30+1280+0


#:903#
# commandlinefu.com by David Winterbottom

# randomize hostname and mac address, force dhcp renew. (for anonymous networkin
g)
dhclient -r && rm -f /var/lib/dhcp3/dhclient* && sed "s=$(hostname)=REPLACEME=g"
 -i /etc/hosts && hostname "$(echo $RANDOM | md5sum  | cut -c 1-7 | tr a-z A-Z)"
 && sed "s=REPLACEME=$(hostname)=g" -i /etc/hosts && macchanger -e eth0 && dhcli
ent


#:904#
# commandlinefu.com by David Winterbottom

# most dangerous command ever.
# hdparm -mRuUwx --dco-restore --drq-hsm-error --fwdownload --security-unlock PW
D --security-set-pass PWD --security-disable PWD --security-erase PWD --security
-erase-enhanced PWD --user-master USER --security-mode MODE [device]

# Securely destroy data on given device
# for i in $(seq 1 25); do dd if=/dev/urandom of=<your disk> bs=1M ; done


#:905#
# commandlinefu.com by David Winterbottom

# Clean up poorly named TV shows.
rename -v 's/.*[s,S](\d{2}).*[e,E](\d{2}).*\.avi/SHOWNAME\ S$1E$2.avi/' poorly.n
amed.file.s01e01.avi


#:906#
# commandlinefu.com by David Winterbottom

# change newlines to spaces (or commas or whatever). Acts as a filter or can hav
e c/l args
alias nl2space="perl -ne 'push @F, \$_; END { chomp @F; print join(qq{ }, @F) ,
qq{\n};}' "


#:907#
# commandlinefu.com by David Winterbottom

# Show bash's function definitions you defined in .bash_profile or .bashrc
declare -f [ function_name ]

# change newlines to spaces (or commas or whatever). Acts as a filter or can hav
e c/l args
alias nl2space="perl -ne 'push @F, \$_; END { chomp @F; print join(qq{ }, @F) ,
qq{\n};}' "


#:908#
# commandlinefu.com by David Winterbottom

# change newlines to spaces (or commas or whatever). Acts as a filter or can hav
e c/l args
alias nl2space="perl -ne 'push @F, \$_; END { chomp @F; print join(qq{ }, @F) ,
qq{\n};}' "


#:909#
# commandlinefu.com by David Winterbottom

# Schedule Nice Background Commands That Won't Die on Logout - Alternative to no
hup and at
( trap '' 1; ( nice -n 19 sleep 2h && command rm -v -rf /garbage/ &>/dev/null &&
 trap 1 ) & )

# FAST and NICE Search and Replace for Strings in Files
nice -n19 sh -c 'S=askapache && R=htaccess; find . -type f|xargs -P5 -iFF grep -
l -m1 "$S" FF|xargs -P5 -iFF sed -i -e s%${S}%${R}% FF'


#:910#
# commandlinefu.com by David Winterbottom

# Perform sed substitution on all but the last line of input
sed -e "$ ! s/$/,/"

# FAST and NICE Search and Replace for Strings in Files
nice -n19 sh -c 'S=askapache && R=htaccess; find . -type f|xargs -P5 -iFF grep -
l -m1 "$S" FF|xargs -P5 -iFF sed -i -e s%${S}%${R}% FF'


#:911#
# commandlinefu.com by David Winterbottom

# FAST and NICE Search and Replace for Strings in Files
nice -n19 sh -c 'S=askapache && R=htaccess; find . -type f|xargs -P5 -iFF grep -
l -m1 "$S" FF|xargs -P5 -iFF sed -i -e s%${S}%${R}% FF'


#:912#
# commandlinefu.com by David Winterbottom

# Schedule Nice Background Commands That Won't Die on Logout - Alternative to no
hup and at
( trap '' 1; ( nice -n 19 sleep 2h && command rm -v -rf /garbage/ &>/dev/null &&
 trap 1 ) & )

# FAST and NICE Search and Replace for Strings in Files
nice -n19 sh -c 'S=askapache && R=htaccess; find . -type f|xargs -P5 -iFF grep -
l -m1 "$S" FF|xargs -P5 -iFF sed -i -e s%${S}%${R}% FF'


#:913#
# commandlinefu.com by David Winterbottom

# Encrypted archive with openssl and tar
openssl des3 -salt -in unencrypted-data.tar -out encrypted-data.tar.des3


#:914#
# commandlinefu.com by David Winterbottom

# Changing the terminal title to the last shell command
[[ "x$TERM" == "xrxvt" || "x$XTERM_VERSION" == xXTerm* || "x$COLORTERM" == 'gnom
e-terminal' && "x$SHELL" == */bin/zsh ]] && preexec () { print -Pn "\e]0;$1\a" }

# Changing the terminal title to the last shell command
if [ "$SHELL" = '/bin/zsh' ]; then case $TERM in rxvt|*term|linux) preexec () {
print -Pn "\e]0;$1\a" };; esac; fi


#:915#
# commandlinefu.com by David Winterbottom

# Changing the terminal title to the last shell command
[[ "x$TERM" == "xrxvt" || "x$XTERM_VERSION" == xXTerm* || "x$COLORTERM" == 'gnom
e-terminal' && "x$SHELL" == */bin/zsh ]] && preexec () { print -Pn "\e]0;$1\a" }

# Changing the terminal title to the last shell command
if [ "$SHELL" = '/bin/zsh' ]; then case $TERM in rxvt|*term|linux) preexec () {
print -Pn "\e]0;$1\a" };; esac; fi


#:916#
# commandlinefu.com by David Winterbottom

# More precise BASH debugging
env PS4=' ${BASH_SOURCE}:${LINENO}(${FUNCNAME[0]}) ' sh -x /etc/profile


#:917#
# commandlinefu.com by David Winterbottom

# Get last changed revision to all eclipse projects in a SVN working copy
find . -iname ".project"| xargs -I {} dirname {} | LC_ALL=C xargs -I {} svn info
 {} | grep "Last Changed Rev\|Path" | sed "s/Last Changed Rev: /;/" | sed "s/Pat
h: //" | sed '$!N;s/\n//'


#:918#
# commandlinefu.com by David Winterbottom

# sort lines by length
awk '{print length, $0;}' | sort -nr


#:919#
# commandlinefu.com by David Winterbottom

# Comment out a line in a file
sed -i '19375 s/^/#/' file


#:920#
# commandlinefu.com by David Winterbottom

# Resize a Terminal Window
printf "\e[8;70;180;t"

# Using column to format a directory listing
(printf "PERMISSIONS LINKS OWNER GROUP SIZE MONTH DAY HH:MM PROG-NAME\n" \ ; ls
-l | sed 1d) | column -t


#:921#
# commandlinefu.com by David Winterbottom

# Outputs a 10-digit random number
tr -c -d 0-9 < /dev/urandom | head -c 10


#:922#
# commandlinefu.com by David Winterbottom

# live ssh network throughput test
pv /dev/zero|ssh $host 'cat > /dev/null'

# Schedule Nice Background Commands That Won't Die on Logout - Alternative to no
hup and at
( trap '' 1; ( nice -n 19 sleep 2h && command rm -v -rf /garbage/ &>/dev/null &&
 trap 1 ) & )


#:923#
# commandlinefu.com by David Winterbottom

# Schedule Nice Background Commands That Won't Die on Logout - Alternative to no
hup and at
( trap '' 1; ( nice -n 19 sleep 2h && command rm -v -rf /garbage/ &>/dev/null &&
 trap 1 ) & )


#:924#
# commandlinefu.com by David Winterbottom

# Schedule Nice Background Commands That Won't Die on Logout - Alternative to no
hup and at
( trap '' 1; ( nice -n 19 sleep 2h && command rm -v -rf /garbage/ &>/dev/null &&
 trap 1 ) & )


#:925#
# commandlinefu.com by David Winterbottom

# Functions to display, save and restore $IFS
ifs () { echo -n "${IFS}"|hexdump -e '""  10/1 "'\''%_c'\''\t" "\n"' -e '"" 10/1
 "0x%02x\t" "\n\n"'|sed "s/''\|\t0x[^0-9]//g; $,/^$/d"


#:926#
# commandlinefu.com by David Winterbottom

# Functions to display, save and restore $IFS
ifs () { echo -n "${IFS}"|hexdump -e '""  10/1 "'\''%_c'\''\t" "\n"' -e '"" 10/1
 "0x%02x\t" "\n\n"'|sed "s/''\|\t0x[^0-9]//g; $,/^$/d"


#:927#
# commandlinefu.com by David Winterbottom

# autossh + ssh + screen = super rad perma-sessions
AUTOSSH_POLL=1 autossh -M 21010 hostname -t 'screen -Dr'


#:928#
# commandlinefu.com by David Winterbottom

# download all the presentations from UTOSC2009
b="http://2009.utosc.com"; for p in $( curl -s $b/presentation/schedule/ | grep
/presentation/[0-9]*/ | cut -d"\"" -f2 ); do f=$(curl -s $b$p | grep "/static/sl
ides/" | cut -d"\"" -f4); if [ -n "$f" ]; then echo $b$f; curl -O $b$f; fi done


#:929#
# commandlinefu.com by David Winterbottom

# Makefile argument passing
make [target] VAR=foobar


#:930#
# commandlinefu.com by David Winterbottom

# convert vdi to vmdk (virtualbox hard disk conversion to vmware hard disk forma
t)
VBoxManage internalcommands converttoraw winxp.vdi winxp.raw && qemu-img convert
 -O vmdk winxp.raw winxp.vmdk && rm winxp.raw


#:931#
# commandlinefu.com by David Winterbottom

# convert vdi to vmdk (virtualbox hard disk conversion to vmware hard disk forma
t)
VBoxManage internalcommands converttoraw winxp.vdi winxp.raw && qemu-img convert
 -O vmdk winxp.raw winxp.vmdk && rm winxp.raw


#:932#
# commandlinefu.com by David Winterbottom

# convert vdi to vmdk (virtualbox hard disk conversion to vmware hard disk forma
t)
VBoxManage internalcommands converttoraw winxp.vdi winxp.raw && qemu-img convert
 -O vmdk winxp.raw winxp.vmdk && rm winxp.raw


#:933#
# commandlinefu.com by David Winterbottom

# Shorten url with is.gd using curl, perl
curl -s "http://is.gd/api.php?longurl=[long_url]"

# Get full URL via http://untr.im/api/ajax/api
URL=[target.URL]; curl -q -d "url=$URL" http://untr.im/api/ajax/api | awk -F 'hr
ef="' '{print $3}' | awk -F '" rel="' '{print $1}'


#:934#
# commandlinefu.com by David Winterbottom

# Shorten url with is.gd using curl, perl
curl -s "http://is.gd/api.php?longurl=[long_url]"

# Get full URL via http://untr.im/api/ajax/api
URL=[target.URL]; curl -q -d "url=$URL" http://untr.im/api/ajax/api | awk -F 'hr
ef="' '{print $3}' | awk -F '" rel="' '{print $1}'


#:935#
# commandlinefu.com by David Winterbottom

# Get full URL via http://untr.im/api/ajax/api
URL=[target.URL]; curl -q -d "url=$URL" http://untr.im/api/ajax/api | awk -F 'hr
ef="' '{print $3}' | awk -F '" rel="' '{print $1}'


#:936#
# commandlinefu.com by David Winterbottom

# Get full URL via http://untr.im/api/ajax/api
URL=[target.URL]; curl -q -d "url=$URL" http://untr.im/api/ajax/api | awk -F 'hr
ef="' '{print $3}' | awk -F '" rel="' '{print $1}'


#:937#
# commandlinefu.com by David Winterbottom

# A quick shell command to weed out the small wallpapers
for i in ~/Desktop/Personal/Wallpapers/*.jpg ; { size=$((`identify -format "%wx%
h" $i | sed 's/x/*/'`)) ; if [[ $size -lt 800001 ]] then ; rm -f "$i" ; fi; }


#:938#
# commandlinefu.com by David Winterbottom

# Copy a file over SSH without SCP
uuencode -m <filename> <filename>

# encode image to base64 and copy to clipboard
uuencode -m $1 /dev/stdout | sed '1d' | sed '$d' | tr -d '\n' | xclip -selection
 clipboard


#:939#
# commandlinefu.com by David Winterbottom

# create SQL-statements from textfile with awk
for each in `cut -d " " -f 1 inputfile.txt`; do echo "select * from table where
id = \"$each\";"; done


#:940#
# commandlinefu.com by David Winterbottom

# Compression formats Benchmark
for a in bzip2 lzma gzip;do echo -n>$a;for b in $(seq 0 256);do dd if=/dev/zero
of=$b.zero bs=$b count=1;c=$(date +%s%N);$a $b.zero;d=$(date +%s%N);total=$(echo
 $d-$c|bc);echo $total>>$a;rm $b.zero *.bz2 *.lzma *.gz;done;done


#:941#
# commandlinefu.com by David Winterbottom

# Partition a new disk as all one partition tagged as "LInux LVM"
echo -e "n\np\n1\n\n\nt\n8e\nw" | fdisk /dev/sdX


#:942#
# commandlinefu.com by David Winterbottom

# Convert a MOV captured from a digital camera to a smaller AVI
ffmpeg -i input.mov -b 4096k -vcodec msmpeg4v2 -acodec pcm_u8 output.avi


#:943#
# commandlinefu.com by David Winterbottom

# Convert a MOV captured from a digital camera to a smaller AVI
ffmpeg -i input.mov -b 4096k -vcodec msmpeg4v2 -acodec pcm_u8 output.avi


#:944#
# commandlinefu.com by David Winterbottom

# Convert a MOV captured from a digital camera to a smaller AVI
ffmpeg -i input.mov -b 4096k -vcodec msmpeg4v2 -acodec pcm_u8 output.avi


#:945#
# commandlinefu.com by David Winterbottom

# Record microphone input and output to date stamped mp3 file
arecord -q -f cd -r 44100 -c2 -t raw | lame -S -x -h -b 128 - `date +%Y%m%d%H%M`
.mp3


#:946#
# commandlinefu.com by David Winterbottom

# Set creation timestamp of a file to the creation timestamp of another
touch -r "$FILE1" "$FILE2"


#:947#
# commandlinefu.com by David Winterbottom

# Remove CR LF from a text file
flip -u $FILE

# Convert Windows/DOS Text Files to Unix
Convert Windows/DOS Text Files to Uni

# Convert Windows/DOS Text Files to Unix
flip -u <filenames>


#:948#
# commandlinefu.com by David Winterbottom

# Return IP Address
ifconfig -a| awk 'BEGIN{FS="[ :]+"} /Bcast/{print $4}'

# Return IP Address
ifconfig -a|grep Bcast:|cut -d\: -f2|awk '{print $1}'

# Get a text on a position on the file and store in a variable with a specific s
eparator
TIMEUNIT=$( cat a | grep -n "timescale" | awk -F ":" '{ print $1 } ' )


#:949#
# commandlinefu.com by David Winterbottom

# one-liner mpc track changer using dmenu
mpc play $(sed -n "s@^[ >]\([0-9]\+\)) $(mpc playlist|cut -d' ' -f3-|dmenu -i -p
 'song name'||echo void)@\1@p" < <(mpc playlist))


#:950#
# commandlinefu.com by David Winterbottom

# one-liner mpc track changer using dmenu
mpc play $(sed -n "s@^[ >]\([0-9]\+\)) $(mpc playlist|cut -d' ' -f3-|dmenu -i -p
 'song name'||echo void)@\1@p" < <(mpc playlist))


#:951#
# commandlinefu.com by David Winterbottom

# What is my ip?
alias whatismyip="wget -q -O - http://whatismyip.com/automation/n09230945.asp"


#:952#
# commandlinefu.com by David Winterbottom

# Add the sbin directories to your PATH if it doesn't already exist in ZSH.
path+=( /sbin /usr/sbin /usr/local/sbin ); path=( ${(u)path} );


#:953#
# commandlinefu.com by David Winterbottom

# Creates Solaris alternate boot environment on another zpool.
lucreate -n be1 [-c be0] -p zpool1


#:954#
# commandlinefu.com by David Winterbottom

# Attach all discovered iscsi nodes
iscsiadm -m node -l

# Open-iscsi target discovery
iscsiadm -m discovery -t sendtargets -p 192.168.20.51


#:955#
# commandlinefu.com by David Winterbottom

# most dangerous command ever.
# hdparm -mRuUwx --dco-restore --drq-hsm-error --fwdownload --security-unlock PW
D --security-set-pass PWD --security-disable PWD --security-erase PWD --security
-erase-enhanced PWD --user-master USER --security-mode MODE [device]


#:956#
# commandlinefu.com by David Winterbottom

# most dangerous command ever.
# hdparm -mRuUwx --dco-restore --drq-hsm-error --fwdownload --security-unlock PW
D --security-set-pass PWD --security-disable PWD --security-erase PWD --security
-erase-enhanced PWD --user-master USER --security-mode MODE [device]


#:957#
# commandlinefu.com by David Winterbottom

# Unbelievable Shell Colors, Shading, Backgrounds, Effects for Non-X
for c in `seq 0 255`;do t=5;[[ $c -lt 108 ]]&&t=0;for i in `seq $t 5`;do echo -e
 "\e[0;48;$i;${c}m|| $i:$c `seq -s+0 $(($COLUMNS/2))|tr -d '[0-9]'`\e[0m";done;d
one


#:958#
# commandlinefu.com by David Winterbottom

# Unbelievable Shell Colors, Shading, Backgrounds, Effects for Non-X
for c in `seq 0 255`;do t=5;[[ $c -lt 108 ]]&&t=0;for i in `seq $t 5`;do echo -e
 "\e[0;48;$i;${c}m|| $i:$c `seq -s+0 $(($COLUMNS/2))|tr -d '[0-9]'`\e[0m";done;d
one


#:959#
# commandlinefu.com by David Winterbottom

# Get your external IP address
wget -qO - http://www.sputnick-area.net/ip;echo

# Get your external IP address
wget -q -O - checkip.dyndns.org|sed -e 's/.*Current IP Address: //' -e 's/<.*$//
'

# Get your external IP address
lynx --dump http://ip.boa.nu|sed -e 's/^[[:space:]]*//' -e 's/*[[:space:]]$//'|g
rep -v ^$

# Get your external IP address
wget -O - -q ip.boa.nu

# Get your external IP address
curl whatismyip.org

# Get your external IP address with the best commandlinefu.com command
eval $(curl -s http://www.commandlinefu.com/commands/matching/external/ZXh0ZXJuY
Ww=/sort-by-votes/plaintext|sed -n '/^# Get your external IP address$/{n;p;q}')

# Get your external IP address with a random commandlinefu.com command
IFS=$'\n';cl=($(curl -s http://www.commandlinefu.com/commands/matching/external/
ZXh0ZXJuYWw=/sort-by-votes/plaintext|sed -n '/^# Get your external IP address$/{
n;p}'));c=${cl[$(( $RANDOM % ${#cl[@]} ))]};eval $c;echo "Command used: $c"

# Get your external IP address
exec 3<>/dev/tcp/whatismyip.com/80; echo -e "GET /automation/n09230945.asp HTTP/
1.0\r\nHost: whatismyip.com\r\n" >&3; a=( $(cat <&3) ); echo ${a[${#a[*]}-1]};

# Get your external IP address
echo -e "GET /automation/n09230945.asp HTTP/1.0\r\nHost: whatismyip.com\r\n" | n
c whatismyip.com 80 | tail -n1


#:960#
# commandlinefu.com by David Winterbottom

# Binary Clock
watch -n 1 'echo "obase=2;`date +%s`" | bc'


#:961#
# commandlinefu.com by David Winterbottom

# Sum of the total resident memory Stainless.app is using.
ps -ec -o command,rss | grep Stainless | awk -F ' ' '{ x = x + $2 } END { print
x/(1024) " MB."}'


#:962#
# commandlinefu.com by David Winterbottom

# Test speaker channels
speaker-test -D plug:surround51 -c 6 -l 1 -t wav


#:963#
# commandlinefu.com by David Winterbottom

# List the CPU model name
sed -n 's/^model name[ \t]*: *//p' /proc/cpuinfo

# List the CPU model name
grep "model name" /proc/cpuinfo


#:964#
# commandlinefu.com by David Winterbottom

# Build an exhaustive list of maildir folders for mutt
find ~/Maildir/ -mindepth 1 -type d | egrep -v '/cur$|/tmp$|/new$' | xargs


#:965#
# commandlinefu.com by David Winterbottom

# Build an exhaustive list of maildir folders for mutt
find ~/Maildir/ -mindepth 1 -type d | egrep -v '/cur$|/tmp$|/new$' | xargs


#:966#
# commandlinefu.com by David Winterbottom

# Count emails in an MBOX file
grep -c '^From ' mbox_file


#:967#
# commandlinefu.com by David Winterbottom


#:968#
# commandlinefu.com by David Winterbottom

# Upload images to omploader.org from the command line.
ompload() { curl -F file1=@"$1" http://omploader.org/upload|awk '/Info:|File:|Th
umbnail:|BBCode:/{gsub(/<[^<]*?\/?>/,"");$1=$1;print}';}


#:969#
# commandlinefu.com by David Winterbottom

# search ubuntu packages to find which package contains the executable program p
rogramname
apt-file find bin/programname


#:970#
# commandlinefu.com by David Winterbottom

# Decode a MIME message
munpack file.txt


#:971#
# commandlinefu.com by David Winterbottom

# Decode a MIME message
munpack file.txt


#:972#
# commandlinefu.com by David Winterbottom

# Find all dot files and directories
printf "%s\n" .*

# Find all dot files and directories
ls -d .*

# Find all dot files and directories
echo .*

# Find all dot files and directories
printf "%s\n" .*

# Find all dot files and directories
ls -a | egrep "^\.\w"


#:973#
# commandlinefu.com by David Winterbottom

# Watch a TiVo File On Your Computer
curl -s -c /tmp/cookie -k -u tivo:$MAK --digest http://$tivo/download/$filename
| tivodecode -m $MAK -- - | mplayer - -cache-min 50 -cache 65536


#:974#
# commandlinefu.com by David Winterbottom

# geoip information
geoiplookup www.commandlinefu.com

# geoip information
geo(){ curl -s "http://www.geody.com/geoip.php?ip=$(dig +short $1)"| sed '/^IP:/
!d;s/<[^>][^>]*>//g'; }


#:975#
# commandlinefu.com by David Winterbottom

# Amazing real time picture of the sun in your wallpaper
curl http://sohowww.nascom.nasa.gov/data/realtime/eit_195/512/latest.jpg | xli -
onroot -fill stdin

# Real time satellite wheather wallpaper
curl http://www.cpa.unicamp.br/imagens/satelite/ult.gif | xli -onroot -fill stdi
n

# kalarm 1 per minute simplest e-mail beacom for Geovision surveillance DVR
curl http://www.spam.la/?f=sender | grep secs| awk '{print; exit}' | osd_cat -i
40 -d 30 -l 2


#:976#
# commandlinefu.com by David Winterbottom

# kalarm 1 per minute simplest e-mail beacom for Geovision surveillance DVR
curl http://www.spam.la/?f=sender | grep secs| awk '{print; exit}' | osd_cat -i
40 -d 30 -l 2


#:977#
# commandlinefu.com by David Winterbottom

# Be notified about overheating of your CPU and/or motherboard
sensors | grep "Core 1" | [[ `sed -e 's/^.*+\([0-9]\{2,3\}\).*(.*/\1/'` -gt 50 ]
] && notify-send "Core 1 temperature exceeds 50 degrees"


#:978#
# commandlinefu.com by David Winterbottom

# Be notified about overheating of your CPU and/or motherboard
sensors | grep "Core 1" | [[ `sed -e 's/^.*+\([0-9]\{2,3\}\).*(.*/\1/'` -gt 50 ]
] && notify-send "Core 1 temperature exceeds 50 degrees"


#:979#
# commandlinefu.com by David Winterbottom

# Listen to BBC Radio from the command line.
bbcradio() { local s;echo "Select a station:";select s in 1 1x 2 3 4 5 6 7 "Asia
n Network an" "Nations & Local lcl";do break;done;s=($s);mplayer -playlist "http
://www.bbc.co.uk/radio/listen/live/r"${s[@]: -1}".asx";}


#:980#
# commandlinefu.com by David Winterbottom

# Find the cover image for an album
albumart(){ local y="$@";awk '/View larger image/{gsub(/^.*largeImagePopup\(.|.,
 .*$/,"");print;exit}' <(curl -s 'http://www.albumart.org/index.php?srchkey='${y
// /+}'&itempage=1&newsearch=1&searchindex=Music');}


#:981#
# commandlinefu.com by David Winterbottom

# Short Information about loaded kernel modules
awk '{print $1}' "/proc/modules" | xargs modinfo | awk '/^(filename|desc|depends
)/'

# Short Information about loaded kernel modules
modinfo $(cut -d' ' -f1 /proc/modules) | sed '/^dep/s/$/\n/; /^file\|^desc\|^dep
/!d'

# Short Information about loaded kernel modules
lsmod | sed -e '1d' -e 's/\(\([^ ]*\) \)\{1\}.*/\2/' | xargs modinfo | sed -e '/
^dep/s/$/\n/g' -e '/^file/b' -e '/^desc/b' -e '/^dep/b' -e d

# Short Information about loaded kernel modules
lsmod | cut -d' ' -f1 | xargs modinfo | egrep '^file|^desc|^dep' | sed -e'/^dep/
s/$/\n/g'


#:982#
# commandlinefu.com by David Winterbottom

# Short Information about loaded kernel modules
awk '{print $1}' "/proc/modules" | xargs modinfo | awk '/^(filename|desc|depends
)/'

# Short Information about loaded kernel modules
modinfo $(cut -d' ' -f1 /proc/modules) | sed '/^dep/s/$/\n/; /^file\|^desc\|^dep
/!d'

# Short Information about loaded kernel modules
lsmod | sed -e '1d' -e 's/\(\([^ ]*\) \)\{1\}.*/\2/' | xargs modinfo | sed -e '/
^dep/s/$/\n/g' -e '/^file/b' -e '/^desc/b' -e '/^dep/b' -e d

# Short Information about loaded kernel modules
lsmod | cut -d' ' -f1 | xargs modinfo | egrep '^file|^desc|^dep' | sed -e'/^dep/
s/$/\n/g'


#:983#
# commandlinefu.com by David Winterbottom

# Tune your guitar from the command line.
for n in E2 A2 D3 G3 B3 E4;do play -n synth 4 pluck $n repeat 2;done

# Create an audio test CD of sine waves from 1 to 99 Hz
(echo CD_DA; for f in {01..99}; do echo "$f Hz">&2; sox -nt cdda -r44100 -c2 $f.
cdda synth 30 sine $f; echo TRACK AUDIO; echo FILE \"$f.cdda\" 0; done) > cdrdao
.toc && cdrdao write cdrdao.toc && rm ??.cdda cdrdao.toc


#:984#
# commandlinefu.com by David Winterbottom

# Create an audio test CD of sine waves from 1 to 99 Hz
(echo CD_DA; for f in {01..99}; do echo "$f Hz">&2; sox -nt cdda -r44100 -c2 $f.
cdda synth 30 sine $f; echo TRACK AUDIO; echo FILE \"$f.cdda\" 0; done) > cdrdao
.toc && cdrdao write cdrdao.toc && rm ??.cdda cdrdao.toc


#:985#
# commandlinefu.com by David Winterbottom

# Burn a directory of mp3s to an audio cd.
alias burnaudiocd='mkdir ./temp && for i in *.[Mm][Pp]3;do mpg123 -w "./temp/${i
%%.*}.wav" "$i";done;cdrecord -pad ./temp/* && rm -r ./temp'

# Create an audio test CD of sine waves from 1 to 99 Hz
(echo CD_DA; for f in {01..99}; do echo "$f Hz">&2; sox -nt cdda -r44100 -c2 $f.
cdda synth 30 sine $f; echo TRACK AUDIO; echo FILE \"$f.cdda\" 0; done) > cdrdao
.toc && cdrdao write cdrdao.toc && rm ??.cdda cdrdao.toc


#:986#
# commandlinefu.com by David Winterbottom

# Create an audio test CD of sine waves from 1 to 99 Hz
(echo CD_DA; for f in {01..99}; do echo "$f Hz">&2; sox -nt cdda -r44100 -c2 $f.
cdda synth 30 sine $f; echo TRACK AUDIO; echo FILE \"$f.cdda\" 0; done) > cdrdao
.toc && cdrdao write cdrdao.toc && rm ??.cdda cdrdao.toc


#:987#
# commandlinefu.com by David Winterbottom

# View the latest astronomy picture of the day from NASA.
apod(){ local x=http://antwrp.gsfc.nasa.gov/apod/;feh $x$(curl -s ${x}astropix.h
tml|grep -Pom1 'image/\d+/.*\.\w+');}


#:988#
# commandlinefu.com by David Winterbottom

# View the latest astronomy picture of the day from NASA.
apod(){ local x=http://antwrp.gsfc.nasa.gov/apod/;feh $x$(curl -s ${x}astropix.h
tml|grep -Pom1 'image/\d+/.*\.\w+');}


#:989#
# commandlinefu.com by David Winterbottom

# View the latest astronomy picture of the day from NASA.
apod(){ local x=http://antwrp.gsfc.nasa.gov/apod/;feh $x$(curl -s ${x}astropix.h
tml|grep -Pom1 'image/\d+/.*\.\w+');}


#:990#
# commandlinefu.com by David Winterbottom

# Simple read and write test with Iozone
iozone -s 2g -r 64 -i 0 -i 1 -t 1


#:991#
# commandlinefu.com by David Winterbottom

# Remove an IP address ban that has been errantly blacklisted by denyhosts
denyhosts-remove $IP_ADDRESS


#:992#
# commandlinefu.com by David Winterbottom

# Burn a directory of mp3s to an audio cd.
alias burnaudiocd='mkdir ./temp && for i in *.[Mm][Pp]3;do mpg123 -w "./temp/${i
%%.*}.wav" "$i";done;cdrecord -pad ./temp/* && rm -r ./temp'


#:993#
# commandlinefu.com by David Winterbottom

# Checks apache's access_log file, strips the search queries and shoves them up
your e-mail
awk '/q=/{print $11}' /var/log/httpd/access_log.4 | awk -F 'q=' '{print $2}' | s
ed 's/+/ /g;s/%22/"/g;s/q=//' | cut -d "&" -f 1

# Checks apache's access_log file, strips the search queries and shoves them up
your e-mail
cat /var/log/httpd/access_log | grep q= | awk '{print $11}' | awk -F 'q=' '{prin
t $2}' | sed 's/+/ /g;s/%22/"/g;s/q=//' | cut -d "&" -f 1 | mail youremail@isp.c
om -s "[your-site] search strings for `date`"


#:994#
# commandlinefu.com by David Winterbottom

# DVD to YouTube ready watermarked MPEG-4 AVI file using mencoder (step 1)
mencoder -oac mp3lame -lameopts cbr=128 -ovc lavc -lavcopts vcodec=mjpeg -o dvd.
avi dvd://0


#:995#
# commandlinefu.com by David Winterbottom

# List all symbolic links in current directory
find /path -type l

# List all symbolic links in current directory
ls -lah | grep ^l

# List all symbolic links in current directory
\ls -1 | xargs -l readlink


#:996#
# commandlinefu.com by David Winterbottom

# Mount a Windows share on the local network (Ubuntu) with user rights and use a
 specific samba user
sudo mount -t cifs -o credentials=/path/to/credenials //hostname/sharename /moun
t/point


#:997#
# commandlinefu.com by David Winterbottom

# Get your bash scripts to handle options (-h, --help etc) and spit out auto-for
matted help or man page when asked!!
process-getopt


#:998#
# commandlinefu.com by David Winterbottom

# configify the list of gems on ur machine. the quick hack
gem list --local | python -c "import sys;import re;l=sys.stdin.readlines();x=['c
onfig.gem \"'+line[:-1][:line.index(' ')] + '\" , ' +line[:-1][line.index(' '):]
.replace('(',':version => \"').replace(')','')+'\"' for line in l];print '\n'.jo
in(x)"

# configify the list of gems on ur machine. the quick hack
gem list --local | python -c "import sys;import re;l=sys.stdin.readlines();x=['c
onfig.gem :'+line[:-1][:line.index(' ')] + ' , ' +line[:-1][line.index(' '):].re
place('(',':version => ').replace(')','') for line in l];print '\n'.join(x)"


#:999#
# commandlinefu.com by David Winterbottom

# Get names of files in /dev, a USB device is attached to
ls -la /dev/disk/by-id/usb-*


#:1000#
# commandlinefu.com by David Winterbottom

# Get names of files in /dev, a USB device is attached to
ls -la /dev/disk/by-id/usb-*


#:1001#
# commandlinefu.com by David Winterbottom

# View a random xkcd comic
wget -q http://dynamic.xkcd.com/comic/random/ -O-| sed -n '/<img src="http:\/\/i
mgs.xkcd.com\/comics/{s/.*\(http:.*\)" t.*/\1/;p}' | awk '{system ("wget -q " $1
 " -O- | display -title $(basename " $1") -write /tmp/$(basename " $1")");}'

# Use curl on Windows to bulk-download the Savitabhabhi Comic Strip (for Adults)
for /L %%x in (1,1,16) do mkdir %%x & curl -R -e http://www.kirtu.com -o %%x/#1.
jpg http://www.kirtu.com/toon/content/sb%x/english/sb%x_en_[001-070].jpg

# Display Dilbert strip of the day
display http://dilbert.com$(curl -s dilbert.com|grep -Po '"\K/dyn/str_strip(/0+)
{4}/.*strip.[^\.]*\.gif')

# View the newest xkcd comic.
wget `lynx --dump http://xkcd.com/|grep png`

# View the newest xkcd comic.
curl -s 'xkcd.com' | awk -F\" '/^<img/{printf("<?xml version=\"1.0\"?>\n<xkcd>\n
<item>\n <title>%s</title>\n <comment>%s</comment>\n <image>%s</image>\n</item>\
n</xkcd>\n", $6, $4, $2)}'

# View the newest xkcd comic.
lynx --dump --source http://www.xkcd.com | grep `lynx --dump http://www.xkcd.com
 | egrep '(png|jpg)'` | grep title | cut -d = -f2,3 | cut -d '"' -f2,4 | sed -e
's/"/|/g' | awk -F"|" ' { system("display " $1);system("echo "$2); } '

# View the newest xkcd comic.
xkcd(){ local f=$(curl -s http://xkcd.com/);display $(echo "$f"|grep -Po '(?<=")
http://imgs.xkcd.com/comics/[^"]+(png|jpg)');echo "$f"|awk '/<img src="http:\/\/
imgs\.xkcd\.com\/comics\/.*?" title=.*/{gsub(/^.*title=.|".*?$/,"");print}';}


#:1002#
# commandlinefu.com by David Winterbottom

# View the newest xkcd comic.
wget `lynx --dump http://xkcd.com/|grep png`

# View the newest xkcd comic.
curl -s 'xkcd.com' | awk -F\" '/^<img/{printf("<?xml version=\"1.0\"?>\n<xkcd>\n
<item>\n <title>%s</title>\n <comment>%s</comment>\n <image>%s</image>\n</item>\
n</xkcd>\n", $6, $4, $2)}'

# View the newest xkcd comic.
lynx --dump --source http://www.xkcd.com | grep `lynx --dump http://www.xkcd.com
 | egrep '(png|jpg)'` | grep title | cut -d = -f2,3 | cut -d '"' -f2,4 | sed -e
's/"/|/g' | awk -F"|" ' { system("display " $1);system("echo "$2); } '

# View the newest xkcd comic.
xkcd(){ local f=$(curl -s http://xkcd.com/);display $(echo "$f"|grep -Po '(?<=")
http://imgs.xkcd.com/comics/[^"]+(png|jpg)');echo "$f"|awk '/<img src="http:\/\/
imgs\.xkcd\.com\/comics\/.*?" title=.*/{gsub(/^.*title=.|".*?$/,"");print}';}


#:1003#
# commandlinefu.com by David Winterbottom

# find read write traffic on disk since startup
iostat -m -d /dev/sda1


#:1004#
# commandlinefu.com by David Winterbottom

# set your ssd disk as a non-rotating medium
sudo echo 0 > /sys/block/sdb/queue/rotational


#:1005#
# commandlinefu.com by David Winterbottom

# set your ssd disk as a non-rotating medium
sudo echo 0 > /sys/block/sdb/queue/rotational


#:1006#
# commandlinefu.com by David Winterbottom

# Shorten url with is.gd using curl, perl
curl -s "http://is.gd/api.php?longurl=[long_url]"

# Match a URL
egrep 'https?://([[:alpha:]]([-[:alnum:]]+[[:alnum:]])*\.)+[[:alpha:]]{2,3}(:\d+
)?(/([-\w/_\.]*(\?\S+)?)?)?'

# Match a URL
cho "(Something like http://foo.com/blah_blah)" | awk '{for(i=1;i<=NF;i++){if($i
~/^(http|ftp):\/\//)print $i}}'

# Match a URL
echo "(Something like http://foo.com/blah_blah)" | grep -oP "\b(([\w-]+://?|www[
.])[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|/)))"


#:1007#
# commandlinefu.com by David Winterbottom

# Match a URL
egrep 'https?://([[:alpha:]]([-[:alnum:]]+[[:alnum:]])*\.)+[[:alpha:]]{2,3}(:\d+
)?(/([-\w/_\.]*(\?\S+)?)?)?'

# Match a URL
cho "(Something like http://foo.com/blah_blah)" | awk '{for(i=1;i<=NF;i++){if($i
~/^(http|ftp):\/\//)print $i}}'

# Match a URL
echo "(Something like http://foo.com/blah_blah)" | grep -oP "\b(([\w-]+://?|www[
.])[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|/)))"


#:1008#
# commandlinefu.com by David Winterbottom

# Match a URL
egrep 'https?://([[:alpha:]]([-[:alnum:]]+[[:alnum:]])*\.)+[[:alpha:]]{2,3}(:\d+
)?(/([-\w/_\.]*(\?\S+)?)?)?'

# Match a URL
cho "(Something like http://foo.com/blah_blah)" | awk '{for(i=1;i<=NF;i++){if($i
~/^(http|ftp):\/\//)print $i}}'

# Match a URL
echo "(Something like http://foo.com/blah_blah)" | grep -oP "\b(([\w-]+://?|www[
.])[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|/)))"


#:1009#
# commandlinefu.com by David Winterbottom

# generate random password
openssl rand -base64 6

# generate random password
pwgen -Bs 10 1


#:1010#
# commandlinefu.com by David Winterbottom

# ruby one-liner to get the current week number
ruby -rdate -e 'p DateTime.now.cweek'

# perl one-liner to get the current week number
date +%V

# ruby one-liner to get the current week number
ruby -e 'require "date"; puts DateTime.now.cweek'

# perl one-liner to get the current week number
perl -e 'use Date::Calc qw(Today Week_Number); $weekn = Week_Number(Today); prin
t "$weekn\n"'


#:1011#
# commandlinefu.com by David Winterbottom

# ruby one-liner to get the current week number
ruby -rdate -e 'p DateTime.now.cweek'

# ruby one-liner to get the current week number
ruby -e 'require "date"; puts DateTime.now.cweek'


#:1012#
# commandlinefu.com by David Winterbottom

# Convert encoding of given files from one encoding to another
iconv -f utf8 -t utf16 /path/to/file


#:1013#
# commandlinefu.com by David Winterbottom

# Return threads count of a process
ps -o thcount -p <process id>


#:1014#
# commandlinefu.com by David Winterbottom

# Return threads count of a process
ps -o thcount -p <process id>


#:1015#
# commandlinefu.com by David Winterbottom

# Router discovery
traceroute 2>/dev/null -n google.com | awk '/^ *1/{print $2;exit}'

# Router discovery
sudo arp-scan 192.168.1.0/24 -interface eth0


#:1016#
# commandlinefu.com by David Winterbottom

# Extract all urls from the last firefox sessionstore.js file used.
sed -e 's/{"url":/\n&/g' ~/.mozilla/firefox/*/sessionstore.js | cut -d\" -f4

# Extract all urls from the last firefox sessionstore.js file used.
grep -oP '"url":"\K[^"]+' $(ls -t ~/.mozilla/firefox/*/sessionstore.js | sed q)

# Show local/public IP adresses with or without interface argument using a shell
 function for Linux and MacOsX
MyIps(){ echo -e "local:\n$(ifconfig $1 | grep -oP 'inet (add?r:)?\K(\d{1,3}\.){
3}\d{1,3}')\n\npublic:\n$(curl -s sputnick-area.net/ip)"; }


#:1017#
# commandlinefu.com by David Winterbottom


#:1018#
# commandlinefu.com by David Winterbottom

# Use curl on Windows to bulk-download the Savitabhabhi Comic Strip (for Adults)
for /L %%x in (1,1,16) do mkdir %%x & curl -R -e http://www.kirtu.com -o %%x/#1.
jpg http://www.kirtu.com/toon/content/sb%x/english/sb%x_en_[001-070].jpg


#:1019#
# commandlinefu.com by David Winterbottom

# Use curl on Windows to bulk-download the Savitabhabhi Comic Strip (for Adults)
for /L %%x in (1,1,16) do mkdir %%x & curl -R -e http://www.kirtu.com -o %%x/#1.
jpg http://www.kirtu.com/toon/content/sb%x/english/sb%x_en_[001-070].jpg


#:1020#
# commandlinefu.com by David Winterbottom

# Quickly batch resize images
mogrify -geometry 800x600 *.jpg


#:1021#
# commandlinefu.com by David Winterbottom

# copy ACL of one file to another using getfacl and setfacl
getfacl <file-with-acl> | setfacl -f - <file-with-no-acl>


#:1022#
# commandlinefu.com by David Winterbottom

# copy ACL of one file to another using getfacl and setfacl
getfacl <file-with-acl> | setfacl -f - <file-with-no-acl>


#:1023#
# commandlinefu.com by David Winterbottom

# copy ACL of one file to another using getfacl and setfacl
getfacl <file-with-acl> | setfacl -f - <file-with-no-acl>


#:1024#
# commandlinefu.com by David Winterbottom


#:1025#
# commandlinefu.com by David Winterbottom

# Collect a lot of icons from /usr/share/icons (may overwrite some, and complain
 a bit)
mkdir myicons; find /usr/share/icons/ -type f -exec cp {} ./myicons/ \;

# Collect a lot of icons from /usr/share/icons (may overwrite some, and complain
 a bit)
mkdir myicons && find /usr/share/icons/ -type f | xargs cp -t myicons


#:1026#
# commandlinefu.com by David Winterbottom

# Find jpeg images and copy them to a central location
find . -iname "*.jpg" -print0 | tr '[A-Z]' '[a-z]' | xargs -0 cp --backup=number
ed -dp -u --target-directory {location} &


#:1027#
# commandlinefu.com by David Winterbottom


#:1028#
# commandlinefu.com by David Winterbottom

# extract plain text from MS Word docx files
unzip -p some.docx word/document.xml | sed -e 's/<[^>]\{1,\}>//g; s/[^[:print:]]
\{1,\}//g'


#:1029#
# commandlinefu.com by David Winterbottom

# urldecoding
perl -pe 's/%([0-9a-f]{2})/sprintf("%s", pack("H2",$1))/eig'


#:1030#
# commandlinefu.com by David Winterbottom

# Analyse compressed Apache access logs for the most commonly requested pages
zcat access_log.*.gz | awk '{print $7}' | sort | uniq -c | sort -n | tail -n 20


#:1031#
# commandlinefu.com by David Winterbottom

# Analyse compressed Apache access logs for the most commonly requested pages
zcat access_log.*.gz | awk '{print $7}' | sort | uniq -c | sort -n | tail -n 20


#:1032#
# commandlinefu.com by David Winterbottom

# validate xml in a shell script using xmllint
xmllint --noout some.xml 2>&1 >/dev/null || exit 1


#:1033#
# commandlinefu.com by David Winterbottom

# Tune your guitar from the command line.
for n in E2 A2 D3 G3 B3 E4;do play -n synth 4 pluck $n repeat 2;done


#:1034#
# commandlinefu.com by David Winterbottom

# Tune your guitar from the command line.
for n in E2 A2 D3 G3 B3 E4;do play -n synth 4 pluck $n repeat 2;done


#:1035#
# commandlinefu.com by David Winterbottom

# Tune your guitar from the command line.
for n in E2 A2 D3 G3 B3 E4;do play -n synth 4 pluck $n repeat 2;done


#:1036#
# commandlinefu.com by David Winterbottom

# hanukkah colored bash prompt
export PS1="\e[0;34m[\u\e[0;34m@\h[\e[0;33m\w\e[0m\e[0m\e[0;34m]#\e[0m "


#:1037#
# commandlinefu.com by David Winterbottom

# hanukkah colored bash prompt
export PS1="\e[0;34m[\u\e[0;34m@\h[\e[0;33m\w\e[0m\e[0m\e[0;34m]#\e[0m "


#:1038#
# commandlinefu.com by David Winterbottom

# bash screensaver (scrolling ascii art with customizable message)
while [ 1 ]; do banner 'ze missiles, zey are coming! ' | while IFS="\n" read l;
do echo "$l"; sleep 0.01; done; done


#:1039#
# commandlinefu.com by David Winterbottom

# Numbers guessing game
A=1;B=100;X=0;C=0;N=$[$RANDOM%$B+1];until [ $X -eq $N ];do read -p "N between $A
 and $B. Guess? " X;C=$(($C+1));A=$(($X<$N?$X:$A));B=$(($X>$N?$X:$B));done;echo
"Took you $C tries, Einstein";


#:1040#
# commandlinefu.com by David Winterbottom

# Open a RemoteDesktop from terminal
rdesktop -a 16 luigi:3052


#:1041#
# commandlinefu.com by David Winterbottom

# Sniffing network to generate a pcap file in CLI mode on a remote host and open
 it via local Wireshark ( GUI ).
tcpdump -v -i <INTERFACE> -s 0 -w /tmp/sniff.pcap port <PORT> # On the remote si
de


#:1042#
# commandlinefu.com by David Winterbottom

# analyze traffic remotely over ssh w/ wireshark
mkfifo /tmp/fifo; ssh-keygen; ssh-copyid root@remotehostaddress; sudo ssh root@r
emotehost "tshark -i eth1 -f 'not tcp port 22' -w -" > /tmp/fifo &; sudo wiresha
rk -k -i /tmp/fifo;

# analyze traffic remotely over ssh w/ wireshark
sudo ssh -Y remoteuser@remotehost sudo wireshark

# analyze traffic remotely over ssh w/ wireshark
ssh root@server.com 'tshark -f "port !22" -w -' | wireshark -k -i -


#:1043#
# commandlinefu.com by David Winterbottom

# analyze traffic remotely over ssh w/ wireshark
mkfifo /tmp/fifo; ssh-keygen; ssh-copyid root@remotehostaddress; sudo ssh root@r
emotehost "tshark -i eth1 -f 'not tcp port 22' -w -" > /tmp/fifo &; sudo wiresha
rk -k -i /tmp/fifo;

# analyze traffic remotely over ssh w/ wireshark
sudo ssh -Y remoteuser@remotehost sudo wireshark

# analyze traffic remotely over ssh w/ wireshark
ssh root@server.com 'tshark -f "port !22" -w -' | wireshark -k -i -


#:1044#
# commandlinefu.com by David Winterbottom

# analyze traffic remotely over ssh w/ wireshark
mkfifo /tmp/fifo; ssh-keygen; ssh-copyid root@remotehostaddress; sudo ssh root@r
emotehost "tshark -i eth1 -f 'not tcp port 22' -w -" > /tmp/fifo &; sudo wiresha
rk -k -i /tmp/fifo;

# analyze traffic remotely over ssh w/ wireshark
sudo ssh -Y remoteuser@remotehost sudo wireshark

# analyze traffic remotely over ssh w/ wireshark
ssh root@server.com 'tshark -f "port !22" -w -' | wireshark -k -i -


#:1045#
# commandlinefu.com by David Winterbottom

# analyze traffic remotely over ssh w/ wireshark
mkfifo /tmp/fifo; ssh-keygen; ssh-copyid root@remotehostaddress; sudo ssh root@r
emotehost "tshark -i eth1 -f 'not tcp port 22' -w -" > /tmp/fifo &; sudo wiresha
rk -k -i /tmp/fifo;

# analyze traffic remotely over ssh w/ wireshark
sudo ssh -Y remoteuser@remotehost sudo wireshark

# analyze traffic remotely over ssh w/ wireshark
ssh root@server.com 'tshark -f "port !22" -w -' | wireshark -k -i -


#:1046#
# commandlinefu.com by David Winterbottom

# Watch postgresql calls from your application on localhost
sudo tcpdump -nnvvXSs 1514 -i lo0 dst port 5432


#:1047#
# commandlinefu.com by David Winterbottom

# p is for pager
p() { l=$LINES; case $1 in do) shift; IFS=$'\n' _pg=( $("$@") ) && _pgn=0 && p r
;;   r) echo "${_pg[*]:_pgn:$((l-4))}";;   d) (( _pgn+=l-4 )); (( _pgn=_pgn>=${#
_pg[@]}?${#_pg[@]}-l+4:_pgn )); p r;;   u) (( _pgn=_pgn<=l-4?0:_pgn-$l-4 )); p r
;; esac; }


#:1048#
# commandlinefu.com by David Winterbottom


#:1049#
# commandlinefu.com by David Winterbottom

# display embeded comments for every --opt, usefull for auto documenting your sc
ript
vim -n -es -c 'g/# CommandParse/+2,/^\s\+esac/-1 d p | % d | put p | %<' -c 'g/^
\([-+]\+[^)]\+\))/,/^\(\s\+[^- \t#]\|^$\)/-1 p' -c 'q!' $0


#:1050#
# commandlinefu.com by David Winterbottom

# display embeded comments for every --opt, usefull for auto documenting your sc
ript
vim -n -es -c 'g/# CommandParse/+2,/^\s\+esac/-1 d p | % d | put p | %<' -c 'g/^
\([-+]\+[^)]\+\))/,/^\(\s\+[^- \t#]\|^$\)/-1 p' -c 'q!' $0


#:1051#
# commandlinefu.com by David Winterbottom

# Slightly better compressed archives
find . \! -type d | rev | sort | rev | tar c --files-from=- --format=ustar | bzi
p2 --best > a.tar.bz2


#:1052#
# commandlinefu.com by David Winterbottom

# Copy a file over SSH without SCP
uuencode -m <filename> <filename>


#:1053#
# commandlinefu.com by David Winterbottom

# Copy a file over SSH without SCP
ssh HOST cat < LOCALFILE ">" REMOTEFILE

# Copy a file over SSH without SCP
uuencode -m <filename> <filename>


#:1054#
# commandlinefu.com by David Winterbottom

# Recursive chmod all files and directories within the current directory
chmod -R 774 .

# Recursive chmod all files and directories within the current directory
find . -print -exec chmod 777 {} \;

# Recursive chmod all files and directories within the current directory
find | xargs chmod 777

# Recursive chmod all files and directories within the current directory
chmod -R 777 *


#:1055#
# commandlinefu.com by David Winterbottom

# Pause and Resume Processes
stop () { ps -ec | grep $@ | kill -SIGSTOP `awk '{print $1}'`; }


#:1056#
# commandlinefu.com by David Winterbottom

# Pause and Resume Processes
stop () { ps -ec | grep $@ | kill -SIGSTOP `awk '{print $1}'`; }


#:1057#
# commandlinefu.com by David Winterbottom

# monitor network traffic and throughput in real time
iptraf


#:1058#
# commandlinefu.com by David Winterbottom

# external projector for presentations
xrandr --auto


#:1059#
# commandlinefu.com by David Winterbottom

# external projector for presentations
xrandr --auto


#:1060#
# commandlinefu.com by David Winterbottom

# external projector for presentations
xrandr --auto


#:1061#
# commandlinefu.com by David Winterbottom

# external projector for presentations
xrandr --auto


#:1062#
# commandlinefu.com by David Winterbottom

# external projector for presentations
xrandr --auto


#:1063#
# commandlinefu.com by David Winterbottom

# Setup a persistant SSH tunnel w/ pre-shared key authentication
autossh -f -i /path/to/key -ND local-IP:PORT User@Server


#:1064#
# commandlinefu.com by David Winterbottom

# Setup a persistant SSH tunnel w/ pre-shared key authentication
autossh -f -i /path/to/key -ND local-IP:PORT User@Server


#:1065#
# commandlinefu.com by David Winterbottom

# Chage default shell for all users [FreeBSD]
cd /usr/home && for i in *;do chsh -s bash $i;done


#:1066#
# commandlinefu.com by David Winterbottom

# Resize a Terminal Window
printf "\e[8;70;180;t"


#:1067#
# commandlinefu.com by David Winterbottom

# Resize a Terminal Window
printf "\e[8;70;180;t"


#:1068#
# commandlinefu.com by David Winterbottom

# Overloading unix system until crash
echo && :(){ :|:& };:


#:1069#
# commandlinefu.com by David Winterbottom

# Overloading unix system until crash
echo && :(){ :|:& };:


#:1070#
# commandlinefu.com by David Winterbottom

# Overloading unix system until crash
echo && :(){ :|:& };:


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