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commandlinefu.com is the place to record those command-line gems that you return to again and again.

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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 - 12,363 results
gmake runtestsingle testsingle=udtime
2009-02-13 16:53:26
User: piyo

Given a GNU Make file version 3.81 with the following entries:

.PHONY: runtest


@for i in $(TESTAUTOEXES) ; do \

echo ">>>> Running test harness $$i" ; \

env $(RUNTESTENV) $$i ; done

.PHONY: runtestsingle

runtestsingle: $(ARCHNAME)/test/auto_$(testsingle).exe $(ARCHNAME)

@for i in $< ; do \

echo ">>>> Running test harness $$i" ; \

env $(RUNTESTENV) $$i ; done

(ARCHNAME is something like ix86-linux-gnu)

Instead of typing gmake runtest to run all the tests, you can run one specific test with the example command.

The sample output is from compiling a C++ program using Boost::Test testing framework.

perl -e 'print scalar localtime $ARGV[0],"\n" ' epoch
gdiff --unified=10000 input.file1 inpute.file2 | egrep -v "(^\+[a-z]|^\-[a-z])"| sort > outputfile.sorted
2009-06-18 20:35:00
User: slashdot
Functions: egrep sort

This commands will make it easier to select only common items between two files being compared. If your lines start with things other than lowercase a-z, adjust this Regex appropriately. Number of lines in the output has been set to no more than 10000, and should be adjusted as needed.

cdrecord -v path_to_iso_image.iso
file -sL /dev/sda7
salt -G 'os_family:Debian' cmd.run ' /usr/lib/update-notifier/apt-check --human-readable'
for i in *.tar.gz *.tgz; do tar -zxvf $i; done
2009-02-18 10:58:12
User: bohemicus
Functions: tar

This is a little bash script that will take all files following the *gz pattern in the directory and apply the tar -zxvf command to them.

ls -F|grep /
2009-10-08 16:35:15
User: romulusnr
Functions: grep ls

No need for -l and the output can be sent directly into another function expecting directory names.

git archive HEAD | gzip > ~/Dropbox/archive.tar.gz
git-random(){ gitRan=$(curl -L -s http://whatthecommit.com/ |grep -A 1 "\"c" |tail -1 |sed 's/<p>//'); git commit -m "$gitRan"; }
2012-03-07 22:25:14
Functions: grep sed tail

Put in your path (.bashrc or similar).

Then instead of running '$ git-commit -m ' use '$ git-random'

alias ll="ls -lh --color=auto"
: ${VAR:?unset variable}
2009-09-14 19:41:01
User: arcege
Tags: shell

Works in all shells. Does not require a test. Handles like an assertion.

scp -i /path/to/file.pem [local-files] root@[dest-host]:[dest-path]
PS1="\[\033[44;1;37m\]\u\[\033[0m\]@\h\\$ "
watch ccache -s
2009-02-13 17:16:32
User: piyo
Functions: watch

OMG, you are a Gentoo junkie.

-funroll-loops-me-harder ;-)


ccache is a compiler cache, which speeds up your compiler on successive runs, because it caches intermediate compiled output.

dig google.com
2009-08-28 04:32:52
User: unixbhaskar
Functions: dig
Tags: dns

It is a much better tool then nslookup for getting information about the any site.It has got better capability too.For reverse information please use the switch "-x" and the ip address.

find . -maxdepth 1 -type f -mtime +60 -ls
grep -rnA 10 TODO *
2011-09-28 16:26:14
User: blockcipher
Functions: grep
Tags: grep

This will recursively go through every file under the current directory showing all lines containing "TODO" as well as 10 lines after it. The output will be marked with line numbers to make it easier to find where the TODO is in the actual file.

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