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May 19, 2015 - A Look At The New Commandlinefu
I've put together a short writeup on what kind of newness you can expect from the next iteration of clfu. Check it out here.
March 2, 2015 - New Management
I'm Jon, I'll be maintaining and improving clfu. Thanks to David for building such a great resource!

Top Tags



Psst. Open beta.

Wow, didn't really expect you to read this far down. The latest iteration of the site is in open beta. It's a gentle open beta-- not in prime-time just yet. It's being hosted over at UpGuard (link) and you are more than welcome to give it a shot. Couple things:

  • » The open beta is running a copy of the database that will not carry over to the final version. Don't post anything you don't mind losing.
  • » If you wish to use your user account, you will probably need to reset your password.
Your feedback is appreciated via the form on the beta page. Thanks! -Jon & CLFU Team

All commands from sorted by
Terminal - All commands - 12,403 results
startx -- :1
2009-02-13 17:22:13
User: sudo

Just tape:

sudo -s

your passwd

startx -- :1

airmon-ng start <interface> <channel>
2009-02-18 11:46:36
User: jie

First you need to instal aircrack-ng

Use this command if you need to put your wireless card into monitor mode.

interface = wlan0 || wifi0 || ath0 et ceatera...

channel = 6, 11, 10, 9 et ceatera

evince "$(find -name 'NameOfPdf.pdf')"
2010-04-04 20:55:51
User: RBerenguel

This assumes there is only one result. Either tail your search for one result or add | head -n 1 before the closing bracket. You can also use locate instead of find, if you have locate installed and updated

setlocal enabledelayedexpansion
2010-08-10 12:26:43
User: Marco

Usually the MS-DOS cmd.exe processes in the whole FOR loop as one command and expands each var like %varname% in before (except the loop var of course).

This command enables expansion of other vars than only the loop var during the FOR loop. The syntax of the var to expand is then !varname! inside the FOR loop.

Use command


to end the setlocal command.

E.g. (only works from batch files, not from commandline directly):

@echo off

setlocal enabledelayedexpansion

FOR %%A IN (*) DO (

set file=%%A

echo !file!



for x in *s.yml; do mv $x `echo $x | sed 's/s\.yml/\.yml/'`; done
2009-03-10 17:51:19
Functions: mv sed

Jan Nelson from Grockit came up with this for us when we needed to rename all of our fixtures.

/sbin/ifconfig | awk -F'[ :]+' '/inet addr/{print $4}'
2009-07-21 14:18:17
User: inof
Functions: awk

That one works on Linux. On BSD and Solaris, the ifconfig output is much easier to parse:

/sbin/ifconfig -a | awk '/inet/{print $2}'
grep $'\t' file.txt
find ~/.thunderbird/*.default/ -name *.msf -print0 | xargs --no-run-if-empty -0 rm;
find . -name .svn -type d -exec rm -rf {} \;
2010-12-15 18:51:08
Functions: find rm

Removing .svn directories without a pipe

dc -e '6k2vp'
mkdir -p temp && for f in *.pdf ; do qpdf --password=YOURPASSWORDHERE --decrypt "$f" "temp/$f"; done && mv temp/* . && rm -rf temp
2013-06-25 18:41:51
Functions: mkdir mv rm

Replace YOURPASSWORDHERE with the pdf password. [qpdf needed]

ls \\someserver\c$\inetpub\wwwroot -r -i web.config | Select-String "SomeMachineName"
2009-03-25 22:36:58
User: cbilson
Functions: ls

Finds all files of a certain name and reports all line with the string. Very simple.

/sbin/ifconfig | grep inet | cut -f 2 -d ":" | cut -f 1 -d " "
2009-07-21 21:42:04
User: random_bob
Functions: cut grep

another way to output the IP address' of the system

sensible-browser http://www.pythonchallenge.com/pc/def/$(bc <<< 2^38).html
2010-02-02 00:53:18
User: kzh
Functions: bc

This is the answer to the 0th problem from the python challenge < http://www.pythonchallenge.com/ >. Replace sensible-browser with firefox, w3m or whatever.

watch -n1 echo
montage input.jpg -auto-orient -duplicate 7 -geometry 500 -frame 5 output.jpg
2011-06-09 14:03:01
User: anthony

Yes, You could do it in the GIMP or even use Inkscape, but the command line is so much easier.

This is a new version of a previous command fixing some things complained about.

help shopt
kill -9 $(pidof *program*)
grep -c '^From ' mbox_file
crontab -l | sed -e '$G;$s-$-'"$CRON_MINS $CRON_HOUR"' * * * /usr/bin/command >/dev/null 2>&1-' | crontab -
2010-01-07 11:00:05
User: JohnGH
Functions: crontab sed

I needed to add a line to my crontab from within a script and didn't want to have to write my own temporary file.

You may find you need to reload the crond after this to make the change take effect.


if [ -x /sbin/service ]


/sbin/service crond reload


CRON_PID=`ps -furoot | awk '/[^a-z]cron(d)?$/{print $2}'`

if [ -n "$CRON_PID" ]





The reason I had CRON_HOUR and CRON_MINS instead of numbers is that I wanted to generate a random time between midnight & 6AM to run the job, which I did with:

CRON_HOUR=`/usr/bin/perl -e 'printf "%02d\n", int(rand(6))'` CRON_MINS=`/usr/bin/perl -e 'printf "%02d\n", int(rand(60));'`
convert input.png -pointsize 32 -gravity center -annotate 45 "hello, world" output.png
find $(locate hello) -type f -executable -print|grep -E "hello\$"
2012-08-18 07:51:53
Functions: find grep locate

This command allow you quick find any executable by keyword(s) in your system.

NOTE: Sometime this command will output like this:

`hello.py.launch': No such file or directory

this is normal behaviour

grep -i s2enc /etc/vcac/server.xml | sed -e 's/.* password=\"\([^\"]*\)\".*/\1/' | xargs -n 1 vcac-config prop-util -d --p 2>/dev/null; echo
find -type f -printf '%P\000' | egrep -iz '\.(avi|mpg|mov|flv|wmv|asf|mpeg|m4v|divx|mp4|mkv)$' | sort -z | xargs -0 ls -1