What's this?

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

Delete that bloated snippets file you've been using and share your personal repository with the world. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Get involved!

You can sign-in using OpenID credentials, or register a traditional username and password.

First-time OpenID users will be automatically assigned a username which can be changed after signing in.

UpGuard checks and validates configurations for every major OS, network device, and cloud provider.

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:



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



Commands using alias from sorted by
Terminal - Commands using alias - 212 results
alias sshto 'ssh -X -t \!:1 "cd \!:2 ; tcsh"'
2012-03-20 20:07:37
User: pranavkn
Functions: alias

Changes machine and cd to specific directory

Add to .*shrc

Usage :


alias sudo='sudo '
2012-03-04 20:02:38
User: Testuser_01
Functions: alias
Tags: sudo alias shell

If you want to carry on your aliases while using sudo, put this into a file which will be parsed when logging in.

alias sortfast='sort -S$(($(sed '\''/MemF/!d;s/[^0-9]*//g'\'' /proc/meminfo)/2048)) $([ `nproc` -gt 1 ]&&echo -n --parallel=`nproc`)'

sort is way slow by default. This tells sort to use a buffer equal to half of the available free memory. It also will use multiple process for the sort equal to the number of cpus on your machine (if greater than 1). For me, it is magnitudes faster.

If you put this in your bash_profile or startup file, it will be set correctly when bash is started.

sort -S1 --parallel=2 <(echo) &>/dev/null && alias sortfast='sort -S$(($(sed '\''/MemF/!d;s/[^0-9]*//g'\'' /proc/meminfo)/2048)) $([ `nproc` -gt 1 ]&&echo -n --parallel=`nproc`)'


echo|sort -S10M --parallel=2 &>/dev/null && alias sortfast="command sort -S$(($(sed '/MemT/!d;s/[^0-9]*//g' /proc/meminfo)/1024-200)) --parallel=$(($(command grep -c ^proc /proc/cpuinfo)*2))"
alias rm='echo "rm is disabled, use trash or /bin/rm instead."'
2012-01-27 03:11:45
User: captaincomic
Functions: alias
Tags: trash rm

To prevent accidental deleting of files you can disable rm with this alias. Then use the trash command from trash-cli instead.

alias path="/usr/bin/perl -e 'use Cwd; foreach my \$file (@ARGV) {print Cwd::abs_path(\$file) .\"\n\" if(-e \$file);}'"
2012-01-18 01:40:05
User: espider1
Functions: alias

The command creates an alias called 'path', so it's useful to add it to your .profile or .bash_profile. The path command then prints the full path of any file, directory, or list of files given. Soft links will be resolved to their true location. This is especially useful if you use scp often to copy files across systems. Now rather then using pwd to get a directory, and then doing a separate cut and paste to get a file's name, you can just type 'path file' and get the full path in one operation.

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

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

alias flashplay="mplayer \$(find /proc/\$(pgrep -f 'libgcflash|libflashplayer')/fd/ -printf '%p %l\n' |grep FlashXX | cut -d\ -f1)"
2011-12-19 09:29:57
User: Aissen
Functions: alias

Alias to play flash videos with mplayer. You can replace mplayer with your favorite video player.

This alias supports Chrome & Firefox's way of handling the flash plugin. It will play all the videos in the cache. Note that certain videos might never make it to the cache, if the publisher ask for them not to: they will just be loaded in RAM.

A variant if you're just interested in playing the audio, for example for a music :

alias flashmusic="mplayer -vo null \$(find /proc/\$(pgrep -f 'libgcfl|libflashplayer')/fd/ -printf '%p %l\n' |grep FlashXX | cut -d\ -f1)"
alias gtasks='chromium-browser --app=https://mail.google.com/tasks/ig'
2011-12-05 22:11:00
User: Bonster
Functions: alias

requires a gmail account, it opens Google tasks in a self contain window, to write your todo list and have it sync online yay =)

alias cls='printf %b '\''\033c'\'''
2011-11-01 14:31:30
Functions: alias

Syntax outside of an alias would be printf %b \\033c. This clears the screen and removes scrollback. Works on gnome-terminal and the XFCE's Terminal, and XTerm. It does clear the screen in Konsole and the Mac Terminal, but does not clear scrollback.

alias mid='printf "\e[8;24;80;t"'
2011-11-01 14:25:45
Functions: alias

Uses printf command to resize terminal.

So far, this is tested to NOT work in Konsole. Works with Mac Terminal, XFCE Terminal, XTerm, gnome-terminal.

alias me="echo '`ifconfig | grep inet | grep broadcast | awk '{print $2}'`' && uname -n"
2011-10-30 19:36:42
User: timrand
Functions: alias

Creates an alias that reports your hostname and IP for you computer. Getting the quotes in an alias with awk commands can be a painful. Need uname and ifconfig--both are included in most unix distributions, I believe. Hope it is useful.

alias ..='cd ..'
alias install='sudo apt-get install'
2011-10-27 19:53:01
User: haivu
Functions: alias
Tags: Ubuntu alias

I put this line in my ~/.bashrc file (which I source via ~/.bash_profile). Now, when I need to install a package, I typed *install* instead of the longer version.

alias calc='python -ic "from math import *; from random import *"'
2011-10-24 08:15:41
User: Bonster
Functions: alias

use python as calculator, press ctrl+d to exit

reminder: when doing factions add atleast one decimal number like so

22.0/7 or 22/7.0

alias dateformatcodes="date --help | sed -n '/^FORMAT/,/%Z/p'"
2011-10-20 17:43:36
Functions: alias

Prints out the list of date(1) format codes, for quick easy reference.

alias busy='rnd_file=$(find /usr/include -type f -size +5k | sort -R | head -n 1) && vim +$((RANDOM%$(wc -l $rnd_file | cut -f1 -d" "))) $rnd_file'
2011-10-16 00:05:59
User: frntn
Functions: alias cut find head sort vim wc

Enhancement for the 'busy' command originally posted by busybee : less chars, no escape issue, and most important it exclude small files ( opening a 5 lines file isn't that persuasive I think ;) )

This makes an alias for a command named 'busy'. The 'busy' command opens a random file in /usr/include to a random line with vim.

alias cn='cat > /dev/null'
2011-09-16 00:00:28
Functions: alias

cn stands for "Cat Null"


The idea is that sometimes you run across something on maybe a webpage - like commandlinefu - that you want to try out on your terminal. You could put a '#' in and then paste it, but what if it is several lines?


This command will echo the pasted characters to the screen and divert them to the bit bucket.


Put this simple alias in your .bashrc, hit cn, paste away, and hit a ctrl+c or a ctrl+d when you are done to get your prompt back.

alias oports="echo -e "User:\tCommand:\tPort:\n----------------------------" && lsof -i 4 -P -n | awk '/LISTEN/ {print $3, $1, $9}' | sed 's/ [a-z0-9\.\*]*:/ /' | sort -u -k 3 -n | xargs printf '%-10s %-10s %-10s\n'"
alias oports="echo 'User: Command: Port:'; echo '----------------------------' ; lsof -i 4 -P -n | grep -i 'listen' | awk '{print \$3, \$1, \$9}' | sed 's/ [a-z0-9\.\*]*:/ /' | sort -k 3 -n |xargs printf '%-10s %-10s %-10s\n' | uniq"
alias cd1='cd $( ls -1t | grep ^d | head -1)'
alias cps="ps -u root U `whoami` --forest -o pid,stat,tty,user,command |ccze -m ansi"
alias cdd="history -a && grep '^ *[0-9]* *cd ' ~/.bash_history| tail -10 >>~/.bash_history && history -r ~/.bash_history"
2011-07-13 09:44:16
User: knoppix5
Functions: alias

This alias is meant to append n (here is n=10) most recently used cd commands to the bottom of history file. This way you can easily change to one of previous visited directories simply by hitting 1-10 times arrow up key.

Hint: You can make more aliases implying the same rule for any set of frequently used long and complex commands like: mkisof, rdesktop, gpg...

map() { if [ "$1" != "" ]; then alias $1="cd `pwd`"; fi }
2011-07-11 15:46:19
User: javidjamae
Functions: alias

Put the function in your .bashrc and use "map [alias]" to create the alias you want. Just be careful to not override an existing alias.

alias google='open http://www.google.com/search?q="'
2011-06-29 20:23:20
Functions: alias


google query_with_spaces "

so, make sure to end your query with a double quote

alias cd1='cd $( ls -lt | grep ^d | head -1 | cut -b 51- )'