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2011-03-12 - Confoo 2011 presentation
Slides are available from the commandlinefu presentation at Confoo 2011: http://presentations.codeinthehole.com/confoo2011/
2011-01-04 - Moderation now required for new commands
To try and put and end to the spamming, new commands require moderation before they will appear on the site.
2010-12-27 - Apologies for not banning the trolls sooner
Have been away from the interwebs over Christmas. Will be more vigilant henceforth.
2010-09-24 - OAuth and pagination problems fixed
Apologies for the delay in getting Twitter's OAuth supported. Annoying pagination gremlin also fixed.




All commands from sorted by
Terminal - All commands - 11,592 results
Find files that have been changed by a Chef run today.
$ apg -m 40 -a 1
2013-07-26 14:13:49
User: blz

apg generates several random passwords. It uses several password generation algorithms (currently two) and a built-in pseudo random number generator.

find -L /home/sonic/archive -name '*gz' -type f
2013-10-07 14:32:22
User: sonic
Functions: find
Tags: find

If /home/sonic/archive/ was a symlink to /backup/sonic/archive it would follow the links and give you the file listing. By default find will NOT follow symbolic links. The default behavior for the find command is to treat the symlinks as literal files.

I discovered this when trying to write a script run via cron to delete files with a modification time older than X days. The easiest solution was to use:

/usr/bin/find -L /home/sonic/archive -name '*gz' -type f -mtime +14 -exec rm '{}' \;

IFS=$(echo -en "\n\b"); mkdir Epub; for i in `find . | grep epub`; do echo "epub: $i"; mv -v "$i" Epub; done
C:\> shutdown /f /r /t 0
2014-04-02 22:35:00
User: mpb
Functions: shutdown

Today, I needed to reboot a Windoze machine on another continent which had no shutdown or restart options via "Start" in the remote desktop (the only options available were: "Logoff, Disconnect, or Lock").

Fortunately, I found how to shutdown and restart from the command line.

getarray(){ a=$1;b="${a[$2]}";eval "c=$b";echo "${c[$3]}";return 0;};a[0]="( a b c )";a[1]="( d e f )";getarray a 1 2
whereis command
cat file | sed -n -r '/^100$|^[0-9]{1,2}$/p'
2010-05-15 19:15:56
User: voyeg3r
Functions: cat file sed

-r to use extended regex

^ begin line

| alternative

get 100 or 0-9 one or two times

STA=KILCHICA30 PAG=http://api.wunderground.com/weatherstation/WXCurrentObXML.asp?ID=${STA} D=($(curl -s $PAG | sed -n 's/.*<\(temp_f\|wind_dir\|wind_mph\)>\(.*\)<\/.*/\2/p')) echo ${D[1]}@${D[2]}mph ${D[0]}F
2010-10-28 00:40:28
User: sud0er
Functions: echo sed

Uses the Wunderground web API to get weather data. Change the STA variable to a station near you.

cat search_items.txt | while read i; do surfraw google -browser=firefox $i; done
2011-05-12 09:27:08
User: bubo
Functions: cat read

tired of opening tabs and fill in search forms by hand? just pipe the search terms you need into this surfraw loop. you can use any browser you have installed, but a graphical browser with a tabbed interface will come in handy. surfraw can be found here:


wget --no-check-certificate https://code.google.com/p/msysgit/downloads/list -O - 2>nul | sed -n "0,/.*\(\/\/msysgit.googlecode.com\/files\/Git-.*\.exe\).*/s//http:\1/p" | wget -i - -O Git-Latest.exe
2012-11-14 08:17:50
User: michfield
Functions: sed wget
Tags: git windows wget

This command should be copy-pasted in Windows, but very similar one will work on Linux.

It uses wget and sed.

cd -
perl -e 'printf "%vd\n",pack "N",rand 256**4'
gconf-editor /apps/evolution/mail/composer/no_signature_delim false
sshpass -p 't@uyM59bQ' ssh username@server.example.com
2012-02-13 09:51:41
User: djyoda
Functions: ssh

You can use sshpass command to provide password for ssh based login. sshpass is a utility designed for running ssh using the mode referred to as "keyboard-interactive" password authentication, but in non-interactive mode.

mkdir Epub ; mv -v --target-directory=Epub $(fgrep -lr epub *)
for f in $(ls *.xml.skippy); do mv $f `echo $f | sed 's|.skippy||'`; done
2009-11-19 21:36:26
User: argherna
Functions: ls mv sed
Tags: sed ls mv for

For this example, all files in the current directory that end in '.xml.skippy' will have the '.skippy' removed from their names.

exim -bV
files=(/usr/share/cowsay/cows/*); cowsay -f `echo ${files[$((RANDOM%${#files}))]}` `fortune` | toilet -F gay -f term
2011-02-20 05:55:33
User: lkjoel

This command will tell you your fortune, with a nice Ascii Art animal, and it is colorized

You need cowsay, toilet and fortune installed.

On Ubuntu this is:

sudo apt-get install cowsay toilet fortune


aptitude install cowsay toilet fortune
VAR=$(head -5)
2014-04-05 13:45:18
User: rodolfoap
Functions: head
Tags: read stdin head,

Reads n lines from stdin and puts the contents in a variable. Yes, I know the read command and its options, but find this logical even for one line.

echo -n '#!'$(which awk)
awk '/^md/ {printf "%s: ", $1}; /blocks/ {print $NF}' </proc/mdstat
wget -k $URL
2010-08-21 17:39:53
User: minnmass
Functions: wget
Tags: wget

The "-k" flag will tell wget to convert links for local browsing; it works with mirroring (ie with "-r") or single-file downloads.

find . -exec grep "test" '{}' /dev/null \; -print
cp -p data.json data.yml