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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!
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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:

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Your feedback is appreciated via the form on the beta page. Thanks! -Jon & CLFU Team

All commands from sorted by
Terminal - All commands - 12,353 results
complete -W "$(echo `cat .bash_history | egrep '^ssh ' | sort | uniq | sed 's/^ssh //'`;)" ssh
2009-07-24 09:48:46
User: kulor
-3

Could use your ssh bash history if your known_hosts are hashed and you want to keep it hashed

dd if=/dev/<device location> | gzip -c /<path to backup location>/<disk image name>.img.gz
passwd -d $USER
2010-05-07 07:15:09
User: TheFox
Functions: passwd
-3

-d, --delete

Delete a user?s password (make it empty). This is a quick way to disable a password for an account. It will set the named account passwordless.

find -name *.\[c\|h\] | xargs wc -l
2011-05-02 21:18:35
User: pescio
Functions: find wc xargs
-3

it recursively searches your project's directories and sum the lines of every source [.c or .h]. Then it gives you the total.

wget -qO - http://cfaj.freeshell.org/ipaddr.cgi
gzip -cd file.gz | ssh [email protected] 'dd of=~/file'
2010-09-20 11:44:19
User: twfcc
Functions: gzip ssh
-3

It is an easy method unzip a file and copy it to remote machine. No unziped file on local hard drive

wmic -U DOMAIN/user --password='password' //IP_HOST "select Caption,CSDVersion,CSName from Win32_OperatingSystem" | grep Windows
2010-09-20 14:23:37
User: dr_gogeta86
Functions: grep
Tags: windows wmic wmi
-3
wmi

Get windows version with servicepack and hostname

. (in NORMAL MODE)
2013-01-08 18:32:57
User: Zulu
Tags: vim
-3

Paste what you previously wrote in INSERT MODE, for example:

1. Write 'foo' in INSERT MODE

2. Return to NORMAL MODE

3. Press "." and it will paste 'foo'

wget http://cmyip.com -O - -o /dev/null | awk '/\<title/ {print $4}'
awk '{ printf "%.2f", $2/1024/1024 ; exit}' /proc/meminfo
ls |while read line ; do mpg321 -w "$line.wav" "$line" ; done
cobbler check
2009-04-27 10:28:29
User: w00binda
-3

A script that checks if your environment is correctly configured for using cobbler.

for z in */*.pdf; do gs -q -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile="$z new" -c .setpdfwrite -f "$z" mv "$z new" "$z"; done
echo "Hello world" | base64
2009-04-27 15:00:08
User: P17
Functions: echo
Tags: encoding
-3

Also works with files:

cat file

Hello world

base64 file

SGVsbG8gd29ybGQK

To decrypt use the -d option:

echo SGVsbG8gd29ybGQK | base64 -d

Hello world

site="http://gifbin.com/"; for i in $(wget -qO- "$site"random| sed -r "s/^.*(bin\/.+\.gif).*$/\1/m" | grep "^bin"); do wget -c "$site$i"; filename=`basename $i`; [ `identify $filename | wc -l` -gt 1 ] || rm -f $filename; done
2011-02-15 10:05:37
User: az
Functions: grep rm sed wc wget
-3

Download a bunch of random animated gifs from http://gifbin.com/

ipconfig /flushdns
cat /proc/acpi/battery/*/state
for i in *ext; do mv $i ${i%.ext}; done
2011-11-13 03:58:08
User: paulochf
Functions: mv
-3

For those files in current folder that would be shown in `ls *ext`, for some extension ext, move/rename that file removing the .ext suffix from the file name.

It uses Bash's parameter substitution, as seen in

http://tldp.org/LDP/abs/html/parameter-substitution.html#PCTPATREF

(for analog use in prefix, see http://tldp.org/LDP/abs/html/parameter-substitution.html#PSOREX2 )

echo 'mkcd() { mkdir -p "$@" && cd "$_"; }' >> ~/.bashrc
2010-01-13 09:37:56
User: phaidros
Functions: cd echo mkdir
-3

combines mkdir and cd

added quotes around $_, thanx to flatcap!

for i in $(find . -iname '*.html'); do sed '/String/d' $i > $i-tmp; mv $i-tmp $i; done
2010-09-21 14:35:18
User: cadu
Functions: find mv sed
Tags: sed find
-3

Search in all html files and remove the lines that 'String' is found.

pgrep rouge-process | xargs sudo kill -9
2010-05-09 22:30:05
User: mheadd
Functions: kill sudo xargs
Tags: xargs pgrep
-3

Find and kill multiple instances of a process with one simple command.

while true; do /bin/true; done
2009-02-18 22:08:18
User: deepc0re
-3

Loads your CPU, run a instance for each CPU/CORE.

ls -shF --color
2009-09-03 05:45:33
User: Viperlin
Functions: ls
-3

use manpages, they give you "ultimate commands"

"ls -SshF --color" list by filesize (biggest at the top)

"ls -SshFr --color" list by filesize in reverse order (biggest at the bottom)

lynx --dump icanhazip.com
alias o='xdg-open "$@" 2>/dev/null'
2011-12-26 08:52:22
User: Bonster
Functions: alias
-3

use xdg-open without looking at error messages

examples msg:

(nautilus:3955): Gtk-WARNING **: Theme parsing error: Notebook.css:21:15: Junk at end of value