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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

Commands tagged alias from sorted by
Terminal - Commands tagged alias - 69 results
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 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.

2011-09-23 11:00:35
User: egreSS
Tags: alias

A simple directive which disables all aliases and functions for the command immediately following it. Shortcut for the bash built-in 'command' - "command linefoo".

Think, {sic}...

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.

echo "alias topu='top -u USERNAME'" >> ~/.bash_aliases && source .bashrc
2011-07-07 08:24:06
User: TheLugal
Functions: echo
Tags: top alias bashrc

This is useful if you use a shell with a lot of other users. You will be able to run "topu" to see your running processes instead of the complete 'top -u username'.

Read more on alias: http://man.cx/alias

alias va='vi ~/.aliases; source ~/.aliases && echo "aliases sourced"'
2011-03-10 06:41:37
User: greggster
Functions: alias echo

When setting up a new aliases file, or having creating a new file.. About every time after editing an aliases file, I source it. This alias makes editing alias a bit easier and they are useful right away. Note if the source failed, it will not echo "aliases sourced".

Sub in vi for your favorite editor, or alter for ksh, sh, etc.

alias big='BIG () { find . -size +${1}M -ls; }; BIG $1'
2011-03-10 06:33:00
User: greggster
Functions: alias find

This is for bash - make an alias - also a good blueprint for making aliases that take arguments to functions. If for Solaris use "-size +${1}000000c" to replace "-size +${1}M"

alias sagi="yes | sudo apt-get install"
2011-03-06 03:45:47
User: theepicsnail
Functions: alias
Tags: alias apt-get

This alias is quicker to type than 'sudo apt-get install', and it automatically says yes to the prompt that shows up sometimes.

diff -Naur --strip-trailing-cr
2011-02-10 14:32:42
User: ruslan
Functions: diff

This form is used in patches, svn, git etc. And I've created an alias for it:

alias diff='diff -Naur --strip-trailing-cr'

The latter option is especially useful, when somebody in team works in Windows; could be also used in commands like

svn diff --diff-cmd 'diff --strip-trailing-cr'...
alias rdp='rdesktop -u <user> -g 1600x1200 -D -r disk:home=/home -r clipboard:PRIMARYCLIPBOARD'
2011-02-04 16:22:49
User: bbbco
Functions: alias

Sets an alias to remote desktop to the specified console, along with options to ensure the RDP session takes up the whole screen, includes a home directory mapping, and clipboard mappings.

alias ping='ping -n'
alias irssi="screen -wipe; screen -A -U -x -R -S irssi irssi"
2010-12-15 09:10:53
User: djsmiley2k
Functions: alias

Bash alias for easy irssi within screen, attempts to attach to existing irssi session, if one exists, otherwise creates one - Including wipe for when system reboots and leaves "dead" session.

alias -g R=' &; jobs | tail -1 | read A0 A1 A2 cmd; echo "running $cmd"; fg "$cmd"; zenity --info --text "$cmd done"; unset A0 A1 A2 cmd'
2010-12-13 17:44:36
User: pipeliner
Functions: alias echo fg jobs read tail unset

make, find and a lot of other programs can take a lot of time. And can do not. Supppose you write a long, complicated command and wonder if it will be done in 3 seconds or 20 minutes. Just add "R" (without quotes) suffix to it and you can do other things: zsh will inform you when you can see the results.

You can replace zenity with other X Window dialogs program.

alias tarred='( ( D=`builtin pwd`; F=$(date +$HOME/`sed "s,[/ ],#,g" <<< ${D/${HOME}/}`#-%F.tgz); tar --ignore-failed-read --transform "s,^${D%/*},`date +${D%/*}.%F`,S" -czPf "$F" "$D" &>/dev/null ) & )'
2010-11-18 06:24:34
User: AskApache
Functions: alias date tar

This is freaking sweet!!! Here is the full alias, (I didn't want to cause display problems on commandlinefu.com's homepage):

alias tarred='( ( D=`builtin pwd`; F=$(date +$HOME/`sed "s,[/ ],#,g" <<< ${D/${HOME}/}`#-%F.tgz); S=$SECONDS; tar --ignore-failed-read --transform "s,^${D%/*},`date +${D%/*}.%F`,S" -czPf "$"F "$D" && logger -s "Tarred $D to $F in $(($SECONDS-$S)) seconds" ) & )'

Creates a .tgz archive of whatever directory it is run from, in the background, detached from current shell so if you logout it will still complete. Also, you can run this as many times as you want, if the archive .tgz already exists, it just moves it to a numbered backup '--backup=numbered'. The coolest part of this is the transformation performed by tar and sed so that the archive file names are automatically created, and when you extract the archive file it is completely safe thanks to the transform command.

If you archive lets say /home/tombdigger/new-stuff-to-backup/ it will create the archive /home/#home#tombdigger#new-stuff-to-backup#-2010-11-18.tgz Then when you extract it, like tar -xvzf #home#tombdigger#new-stuff-to-backup#-2010-11-18.tgz instead of overwriting an existing /home/tombdigger/new-stuff-to-backup/ directory, it will extract to /home/tombdigger/new-stuff-to-backup.2010-11-18/

Basically, the tar archive filename is the PWD with all '/' replaced with '#', and the date is appended to the name so that multiple archives are easily managed. This example saves all archives to your $HOME/archive-name.tgz, but I have a $BKDIR variable with my backup location for each shell user, so I just replaced HOME with BKDIR in the alias.

So when I ran this in /opt/askapache/SOURCE/lockfile-progs-0.1.11/ the archive was created at /askapache-bk/#opt#askapache#SOURCE#lockfile-progs-0.1.11#-2010-11-18.tgz

Upon completion, uses the universal logger tool to output its completion to syslog and stderr (printed to your terminal), just remove that part if you don't want it, or just remove the '-s ' option from logger to keep the logs only in syslog and not on your terminal.

Here's how my syslog server recorded this..

2010-11-18T00:44:13-05:00 gravedigger.askapache.com ( [user] [notice] (logger:) Tarred /opt/askapache/SOURCE/lockfile-progs-0.1.11 to /askapache-bk/tarred/#opt#SOURCE#lockfile-progs-0.1.11#-2010-11-18.tgz in 4 seconds


Really this is very robust and foolproof, the only issues I ever have with it (I've been using this for years on my web servers) is if you run it in a directory and then a file changes in that directory, you get a warning message and your archive might have a problem for the changed file. This happens when running this in a logs directory, a temp dir, etc.. That's the only issue I've ever had, really nothing more than a heads up.


This is a simple alias, and very useful as it works on basically every linux box with semi-current tar and GNU coreutils, bash, and sed.. But if you want to customize it or pass parameters (like a dir to backup instead of pwd), check out this function I use.. this is what I created the alias from BTW, replacing my aa_status function with logger, and adding $SECONDS runtime instead of using tar's --totals

function tarred ()


local GZIP='--fast' PWD=${1:-`pwd`} F=$(date +${BKDIR}/%m-%d-%g-%H%M-`sed -u 's/[\/\ ]/#/g'

[[ ! -r "$PWD" ]] && echo "Bad permissions for $PWD" 1>&2 && return 2;

( ( tar --totals --ignore-failed-read --transform "s@^${PWD%/*}@`date [email protected]" -czPf $F $PWD && aa_status "Completed Tarp of $PWD to $F" ) & )


#From my .bash_profile http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html

alias whichall='{ command alias; command declare -f; } | command which --read-functions --read-alias -a'
2010-11-18 03:32:04
User: AskApache
Functions: alias command which

5 helpful aliases for using the which utility, specifically for the GNU which (2.16 tested) that is included in coreutils.

Which is run first for a command. Same as type builtin minus verbosity

alias which='{ command alias; command declare -f; } | command which --read-functions --read-alias'

Which (a)lias

alias whicha='command alias | command which --read-alias'

Which (f)unction

alias whichf='command declare -f | command which --read-functions'

Which e(x)ecutable file in PATH

alias whichx='command which'

Which (all) alias, function, builtin, and files in PATH

alias whichall='{ command alias; command declare -f; } | command which --read-functions --read-alias -a'

# From my .bash_profile http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html

alias sete='set|sed -n "/^`declare -F|sed -n "s/^declare -f \(.*\)/\1 ()/p;q"`/q;p"'
2010-11-17 23:58:01
User: AskApache
Functions: alias sed

Normally the bash builtin command 'set' displays all vars and functions. This just shows the vars. Useful if you want to see different output then env or declare or export.

Alias 'sete' shows sets variables

alias sete='set|sed -n "/^`declare -F|sed -n "s/^declare -f \(.*\)/\1 ()/p;q"`/q;p"'

Alias setf shows the functions.

alias setf='set|sed -n "/^`declare -F|sed -n "s/^declare -f \(.*\)/\1 ()/p;q"`/,\$p"'

Also see: http://www.commandlinefu.com/commands/view/6899/print-all-environment-variables-including-hidden-ones

At the very least, some cool sed commands!

From my .bash_profile http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html

alias sshv='ssh -vvv -o LogLevel=DEBUG3'
2010-10-30 11:23:52
User: AskApache
Functions: alias

When debugging an ssh connection either to optimize your settings ie compression, ciphers, or more commonly for debugging an issue connecting, this alias comes in real handy as it's not easy to remember the '-o LogLevel=DEBUG3' argument, which adds a boost of debugging info not available with -vvv alone.

Especially useful are the FD info, and the setup negotiation to create a cleaner, faster connection.

for _a in {A..Z} {a..z};do _z=\${!${_a}*};for _i in `eval echo "${_z}"`;do echo -e "$_i: ${!_i}";done;done|cat -Tsv

This uses some tricks I found while reading the bash man page to enumerate and display all the current environment variables, including those not listed by the 'env' command which according to the bash docs are more for internal use by BASH. The main trick is the way bash will list all environment variable names when performing expansion on ${!A*}. Then the eval builtin makes it work in a loop.

I created a function for this and use it instead of env. (by aliasing env).

This is the function that given any parameters lists the variables that start with it. So 'aae B' would list all env variables starting wit B. And 'aae {A..Z} {a..z}' would list all variables starting with any letter of the alphabet. And 'aae TERM' would list all variables starting with TERM.

aae(){ local __a __i __z;for __a in "$@";do __z=\${!${__a}*};for __i in `eval echo "${__z}"`;do echo -e "$__i: ${!__i}";done;done; }

And my printenv replacement is:

alias env='aae {A..Z} {a..z} "_"|sort|cat -v 2>&1 | sed "s/\\^\\[/\\\\033/g"'

From: http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html

alias alert='notify-send -i /usr/share/icons/gnome/32x32/apps/gnome-terminal.png "[$?] $(history|tail -n1|sed -e '\''s/^\s*[0-9]\+\s*//;s/;\s*alert$//'\'')"'
2010-09-12 02:54:40
User: pkiller
Functions: alias

This is an alias you can add to your .bashrc file to get notified when a job you run in a terminal is done.

example of use

sleep 20; alert


alias ltmux="if tmux has; then tmux attach; else tmux new; fi"
2010-07-19 01:27:47
Functions: alias
Tags: bash alias sh tmux

If a tmux session is already running attach it, otherwise create a new one. Useful if you often forget about running tmuxes (or just don't care)

svn up -r PREV # revert
2010-07-07 23:09:00

* Add comment with # in your command

* Later you can search that command on that comment with CTRL+R

In the title command, you could search it later by invoking the command search tool by first typing CTRL+R and then typing "revert"

alias sorth='sort --help|sed -n "/^ *-[^-]/s/^ *\(-[^ ]* -[^ ]*\) *\(.*\)/\1:\2/p"|column -ts":"'

Once you get into advanced/optimized scripts, functions, or cli usage, you will use the sort command alot. The options are difficult to master/memorize however, and when you use sort commands as much as I do (some examples below), it's useful to have the help available with a simple alias. I love this alias as I never seem to remember all the options for sort, and I use sort like crazy (much better than uniq for example).

# Sorts by file permissions

find . -maxdepth 1 -printf '%.5m %10M %p\n' | sort -k1 -r -g -bS 20%

00761 drwxrw---x ./tmp

00755 drwxr-xr-x .

00701 drwx-----x ./askapache-m

00644 -rw-r--r-- ./.htaccess

# Shows uniq history fast

history 1000 | sed 's/^[0-9 ]*//' | sort -fubdS 50%

exec bash -lxv

export TERM=putty-256color

Taken from my http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html

alias dateh='date --help|sed -n "/^ *%%/,/^ *%Z/p"|while read l;do F=${l/% */}; date +%$F:"|'"'"'${F//%n/ }'"'"'|${l#* }";done|sed "s/\ *|\ */|/g" |column -s "|" -t'

If you have used bash for any scripting, you've used the date command alot. It's perfect for using as a way to create filename's dynamically within aliases,functions, and commands like below.. This is actually an update to my first alias, since a few commenters (below) had good observations on what was wrong with my first command.

# creating a date-based ssh-key for askapache.github.com

ssh-keygen -f ~/.ssh/`date +git-$USER@$HOSTNAME-%m-%d-%g` -C [email protected]' # [email protected]

# create a tar+gzip backup of the current directory

tar -czf $(date +$HOME/.backups/%m-%d-%g-%R-`sed -u 's/\//#/g' <<< $PWD`.tgz) . # tar -czf /home/gpl/.backups/04-22-10-01:13-#home#gpl#.rr#src.tgz .

I personally find myself having to reference

date --help

quite a bit as a result. So this nice alias saves me a lot of time. This is one bdash mofo. Works in sh and bash (posix), but will likely need to be changed for other shells due to the parameter substitution going on.. Just extend the sed command, I prefer sed to pretty much everything anyways.. but it's always preferable to put in the extra effort to go for as much builtin use as you can. Otherwise it's not a top one-liner, it's a lazyboy recliner.

Here's the old version:

alias dateh='date --help|sed "/^ *%%/,/^ *%Z/!d;s/ \+/ /g"|while read l;do date "+ %${l/% */}_${l/% */}_${l#* }";done|column -s_ -t'

This trick from my [ http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html bash_profile ]

alias head='head -n $((${LINES:-`tput lines 2>/dev/null||echo -n 12`} - 2))'

Run the alias command, then issue

ps aux | head

and resize your terminal window (putty/console/hyperterm/xterm/etc) then issue the same command and you'll understand.

${LINES:-`tput lines 2>/dev/null||echo -n 12`}

Insructs the shell that if LINES is not set or null to use the output from `tput lines` ( ncurses based terminal access ) to get the number of lines in your terminal. But furthermore, in case that doesn't work either, it will default to using the deafault of 12 (-2 = 10).

The default for HEAD is to output the first 10 lines, this alias changes the default to output the first x lines instead, where x is the number of lines currently displayed on your terminal - 2. The -2 is there so that the top line displayed is the command you ran that used HEAD, ie the prompt.

Depending on whether your PS1 and/or PROMPT_COMMAND output more than 1 line (mine is 3) you will want to increase from -2. So with my prompt being the following, I need -7, or - 5 if I only want to display the commandline at the top. ( http://www.askapache.com/linux-unix/bash-power-prompt.html )


[7995:7993 - 0:186] 06:26:49 Thu Apr 08 [[email protected]:/dev/pts/0 +1] ~

In most shells the LINES variable is created automatically at login and updated when the terminal is resized (28 linux, 23/20 others for SIGWINCH) to contain the number of vertical lines that can fit in your terminal window. Because the alias doesn't hard-code the current LINES but relys on the $LINES variable, this is a dynamic alias that will always work on a tty device.