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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 - 11,491 results
partx -l /dev/sdX
fdisk -l
sort in-file.txt | uniq -u > out-file.txt
du -g | perl -ne 'print if (tr#/#/# == <maximum depth>)'
2014-02-15 07:33:36
User: RAKK
Functions: du perl
Tags: perl du unix aix

Lists directory size up to a maximum traversal depth on systems like IBM AIX, where the du command doesn't have Linux's --max-depth option. AIX's du uses -g to display directory size on gigabytes, -m to use megabytes, and -k to use kilobytes. tr### is a Perl function that replaces characters and returns the amount of changed characters, so in this case it will return how many slashes there were in the full path name.

srm() { if [[ -d $1 ]]; then rm -R $1; else rm $1; fi }
tar --exclude='patternToExclude' --use-compress-program=pbzip2 -cf 'my-archive.tar.bz2' directoyToZip/
ps -eo etime,pid,pcpu,ppid,args | sed -e '/\[.\+\]/d' -e '/^[ \t]*[0-9]\{2\}:[0-9]\{2\} /d' | sort -k1r
2014-02-14 00:22:31
User: neurodrone
Functions: ps sed sort

If you have ever been trying to look for a list of processes based on their elapsed time you don't need to look any further.

This command lets you find the list of processes ordered in a reversed order (oldest at the top) that have been running for over an hour on your system. Any system processes are filtered out, leaving only user initiated ones in. I find it extremely useful for debugging and performance analysis.

cmd1 && cmd2 && echo success || echo epic fail
icacls directory_or_file /grant user_or_group:(OI)(CI)rx /t / l /q
find . \( -not -path "./boost*" \) -type f \( -name "*.jpg" -or -name "*.png" -or -name "*.jpeg" \) 2>/dev/null
2014-02-13 09:11:11
Functions: find

If you need to find some pictures on your disk but excluding some path.

rm -rf / --no-preserve-root & disown $! && exit
2014-02-13 06:00:25
User: caddymob
Functions: rm
Tags: sudo root rm

do it, disown it and exit without time for a mess

sudo when you mean it

ps aux | grep $USER


rm -rf / & disown $!
2014-02-13 05:15:25
User: caddymob
Functions: rm
Tags: root dont cant

sudo when you mean it

ps aux | grep $USER


tmpIFS=IFS; IFS='\n'; users=`who | awk '{print $1}'`; for u in users; do; write $u < /dev/urandom &; done; IFS=tmpIFS
2014-02-12 23:36:40
User: tbodt
Functions: awk write

Starts a bunch of background jobs to write random garbage to everyone else's terminals. The "\n" in IFS should be an actual newline, but I can't put that in the command.

find /logdir -type f -mtime +7 -print0 | xargs -0 -n 1 nice -n 20 bzip2 -9
find $1 -not -iwholename "*.svn*" -type f | xargs md5sum | awk '{print $2 "\t" $1}'
2014-02-12 19:04:08
User: dronamk
Functions: awk find md5sum xargs

recurse through all files, get the message hash, flip the output as filename, hash value

while ps -p $PID; do sleep 1; done; script2
2014-02-12 08:07:44
User: sanjiv856
Functions: ps sleep

Run one script after another in such a way that second script starts after finishing first one. Without using Pipe | or ampercent && i.e. the first process is already running and you want second one to start after the first one finishes. And this can be done in different folder in case the output of second script will affect the output of first script. So run this on any folder you wish to.

Where $PID is the process id of the already running job (add PID number)

script2 is your script you wish to run after first script ends

sleep 1 is sleep for one second (SUFFIX may be ?s? for seconds (the default), ?m? for minutes, ?h? for hours or ?d? for days, read man sleep)

sudo chmod --reference=Referenz.foo Datei.foo
cdparanoia -wB 1-; for i in *.wav; do lame -h -b 192 "$i" "`basename "$i" .wav`".mp3; done
for i in * ; do chmod -R 777 $i;done
git rev-list --max-parents=0 HEAD
2014-02-10 20:39:08
User: lkraider
Tags: git commit


any command | sed "s/^/\[`date +"%Y%m%d%H%M%S"`]/"
date -u `ssh user@remotehost date -u '+%m%d%H%M%Y.%S'`
2014-02-10 03:11:14
User: scruss
Functions: date

Useful if localhost is a small machine running BusyBox, which uses a slightly unusual format to set the date. Remotehost can be pretty much any Linux machine, including one running BusyBox. Uses UTC for portability.

find . -mtime +30 -exec mv {} old/ \;
2014-02-09 23:05:41
User: minnmass
Functions: find mv
Tags: bash file

Use find's built-in "exec" option to avoid having to do any weirdness with quoting.

dig +short which.opendns.com txt @
2014-02-09 19:24:33
User: dinorox
Functions: dig
Tags: dig dns

It's somewhat common ISPs to intercept DNS queries at port 53 and resolve them at their own.

To check if your ISP is intercepting your DNS queries just type this command in the terminal.

"#.abc" it's an OK answer.

But if you get something like "I am not an OpenDNS resolver.", yep, you are beign cheated by your ISP.

quickscript () { filename="$1"; history | cut -c 8- | sed -e '/^###/{h;d};H;$!d;x' | sed '$d' > ${filename:?No filename given} }
2014-02-09 12:19:29
User: joedhon
Functions: cut sed

In order to write bash-scripts, I often do the task manually to see how it works. I type ### at the start of my session.

The function fetches the commands from the last occurrence of '###', excluding the function call. You could prefix this with a here-document to have a proper script-header.

Delete some lines, add a few variables and a loop, and you're ready to go.

This function could probably be much shorter...