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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:

  • » 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 - 12,411 results
tcpdump -nqt -s 0 -A -i eth0 port 5060
html2text http://checkip.dyndns.org | grep -i 'Current IP Address:'|cut -c21-36
tail -f LOGFILE | awk '{system("say \"" $0 "\"");}'
2011-09-16 06:20:06
User: tamouse
Functions: awk tail
Tags: awk tail say

like #9295, but awkish instead of perlish

tar -cf "../${PWD##*/}.tar" .
2013-11-06 11:15:38
User: joedhon
Functions: tar

should do the same as command #12875, just shorter.

cat schema.sql data.sql test_data.sql | mysql -u user --password=pass dbname
2009-03-24 08:39:40
User: tristan_ph
Functions: cat
Tags: mysql cat

Be aware of using the --password argument as it will appear your password in plain text on the screen. You may use -p argument instead, it will prompt you to enter you password in hidden mode.

wget http://www.discogs.com/search?q=724349691704 -O foobar &> /dev/null ; grep \/release\/ foobar | head -2 | tail -1 | sed -e 's/^<div>.*>\(.*\)<\/a><\/div>/\1/' ; rm foobar
2011-01-30 23:34:54
User: TetsuyO
Functions: grep head rm sed tail wget

Substitute that 724349691704 with an UPC of a CD you have at hand, and (hopefully) this oneliner should return the $Artist - $Title, querying discogs.com.

Yes, I know, all that head/tail/grep crap can be improved with a single sed command, feel free to send "patches" :D


echo -n "String to MD5" | md5sum | awk '{print $1}'
s=/etc/ssh/sshd_config;r=PermitRootLogin;cp $s{,.old}&& if grep $r $s;then sed "s/$r yes/$r no/" $s.old > $s; else echo $r no >> $s;fi
2011-01-30 23:41:59
User: kzh
Functions: cp echo grep sed
Tags: bash openssh

This will tighten up security for your box. The default value for PermitRootLogin sadly is 'yes'.

mysql -u <user> --password=<password> -e "SHOW COLUMNS FROM <table>" <database> | awk '{print $1}' | tr "\n" "," | sed 's/,$//g'
2009-10-29 13:42:17
User: maxmanders
Functions: awk sed tr

Useful when you need to write e.g. an INSERT for a table with a large number of columns. This command will retrieve the column names and comma-separate them ready for INSERT INTO(...), removing the last comma.

ffmpeg -i movie.mpg -vhook '/usr/lib/vhook/watermark.so -f overlay.png -m 1 -t 222222' -an mm.flv
fdupes DIRECTORY/ -r -d
2011-03-05 09:48:35
User: desmatron

allow you to find duplicates files in "DIRECTORY" and choose wich one to delete

fudpes must be installed: sudo apt-get install fdupes

( while read File; do mogrify -resize 1024 -quality 96 $File; done ) < filelist
2009-02-08 02:48:26
User: Corsair
Functions: read

Imagemagick library is used. If image format is not JPEG, the "quality" option should not be issued.

sudo service bluetooth restart
kill -9 $(ps -ef | grep [h]ttpd | awk '{print $2}')
echo -e "CHECK=SAMPLE" output --command_to_long
2013-04-03 08:46:47
User: techie
Functions: echo

This is longer than others on here. The reason for this is I have combined two different matrix commands so it would work on all computers. I logged onto my server through a computer and it worked fine. I logged into my server through a mac and it looked $4!t so I have made one that works through both.

ps -e -o pid,vsz,comm= | sort -n -k 2
2014-05-14 00:36:50
Functions: ps sort

left-most column is PID, middle is virtual memory being consumed, right-most is actual process.

find . -size 0 -print0 | xargs -0 rm
2009-10-29 14:10:02
User: osvaldofilho
Functions: find xargs

The command find search commands with size zero and erase them.

date MMDDhhmmYYYY
2010-05-29 08:26:13
User: christian773
Functions: date

date MMDDhhmmYYYY

date MMDDhhmm

# example 27.12.1975 08:00

date 122708001975

c="cp -a";e="~";echo -e "\npaste\n";i=0;k="1"; while [[ "$k" != "" ]]; do read -a k;r[i]=$k;((i++));done;i=0;while :;do t=${r[i]};[ "$t" == "" ] && break; g=$(echo $c ${r[i]} $e);echo -e $g "\ny/n?";read y;[ "$y" != "n" ] && eval $g;((i++));done
2011-12-04 12:45:44
User: knoppix5
Functions: echo eval read


command [options] [paste your variable here] parameter

command [options] [paste entire column of variables here] parameter


(hard-code command "c" and parameter "e" according to your wishes: in example shown command = "cp -a" and parameter = "~")


- Quick exchange only variable part of a long command line

- Make variable part to be an entire column of data (i.e. file list)

- Full control while processing every single item


Paste column of data from anywhere. I.e. utilize the Block Select Mode to drag, select and copy columns (In KDE Konsole with Ctrl+Alt pressed, or only Ctrl pressed in GNOME Terminal respectively).


You can paste only one single variable in a row. If there are more space separated variables in a row only first one will be processed, but you can arrange your variables in a column instead. To transpose rows to columns or vice versa look at Linux manual pages for 'cut' and 'paste'.


- add edit mode to vary command "c" and parameter "e" on the fly

- add one edit mode more to handle every list item different

- add y/n/a (=All) instead of only y(=default)/n to allowed answers


The code is not optimized, only the basic idea is presented here. It's up to you to shorten code or extend the functionality.

sed -i 's/http:\/\/old\/new\///g' index.html
tar -cf - folder/ | gpg -c > folder.tpg
2009-05-08 19:20:08
User: copremesis
Functions: gpg tar

gpg's compression is as suitable as gzip's however your backups can now be encrypted.

to extract use:

gpg < folder.tpg | tar -xf -
fetch -q -o - http://ipchicken.com | egrep -o '([[:digit:]]{1,3}\.){3}[[:digit:]]{1,3}'
2009-08-06 11:57:44
User: spackle
Functions: egrep

Same thing as above, just uses fetch and ipchicken.com

disper --displays=auto -e -t left
2010-01-28 06:46:56

Disper: http://willem.engen.nl/projects/disper/

Moving Gnome Panels to the external screen is done using gconf-editor, changing property "/apps/panel/toplevels/top_panel_screen0/monitor", as well as "/apps/panel/toplevels/bottom_panel_screen0/monitor" to int value "1". This can be done from the command line using '

gconftool-2 --set "/apps/panel/toplevels/top_panel_screen0/monitor" --type integer "1"' so a nice script can be written.

wget -O - http://checkip.dyndns.org|sed 's/[^0-9.]//g'
svn log -v | less