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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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Maintained by Jon H.

Site originally by David Winterbottom (user root).

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

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Terminal - All commands - 12,387 results
tr '[:upper:]' '[:lower:]' < input.txt > output.txt
sudo curl "http://hg.mindrot.org/openssh/raw-file/c746d1a70cfa/contrib/ssh-copy-id" -o /usr/bin/ssh-copy-id && sudo chmod 755 /usr/bin/ssh-copy-id
2012-02-09 20:29:24
User: misterich
Functions: chmod sudo

Mac install ssh-copy-id

From there on out, you would upload keys to a server like this:

(make sure to double quote the full path to your key)

ssh-copy-id -i "/PATH/TO/YOUR/PRIVATE/KEY" username@server

or, if your SSH server uses a different port (often, they will require that the port be '2222' or some other nonsense:

(note the double quotes on *both* the "/path/to/key" and "user@server -pXXXX"):

ssh-copy-id -i "/PATH/TO/YOUR/PRIVATE/KEY" "username@server -pXXXX"

...where XXXX is the ssh port on that server

watch -n 7 -d 'uptime | sed s/.*users?, //'
odmget -q "attribute=unique_id" CuAt |sed -n 's/.*name = "\(.*\)"/\1/p;s/.*value = "..........\(....\)..SYMMETRIX..EMCfcp.*"/0x\1/p;s/.*value =//p'
setopt correct
2012-09-11 01:47:20
User: evandrix
Tags: zsh

zsh has a powerful correction mechanism. If you type a command in the wrong way it suggests corrections. What happend here is that dir is an unknown command and zsh suggests gdir, while maybe ls was what you wanted.

If you want to execute gdir hit y (yes)

If you want to try to execute dir anyway hit n (no)

If you want to execute completely different spelt command like ls hit a (abort) and type your command

If you want to execute a similar spelt commant like udir hit e (edit) and edit your command.

Limit kernel compilation load
for output in $(find . ! -name movie.nfo -name "*.nfo") ; do rm $output ; done
2014-04-01 17:41:50
User: analbeard
Functions: find rm

Finds all nfo files without the filename movie.nfo and deletes them.

grep -r -l xxxxx . | xargs perl -i -pe "s/xxxxx/yyyyy/g"
2009-02-06 08:18:50
User: hassylin
Functions: grep perl xargs

This script first find all files which contains word xxxxx recursively. Then replace the word xxxxx to yyyyy of the files.

Use case:

- Web site domain change

- Function name change of the program

mount -t cd9660 /dev/`mdconfig -a -t vnode -f discimg.iso` /cdrom
2009-02-19 06:31:14
User: mulad
Functions: mount

FreeBSD version of the Linux command

mount discimg.iso /cdrom -o loop

The "mdconfig" command creates a device and prints the name (typically "md0"). Just append that to "/dev/" and mount.

Once unmounted, you can unconfigure the device with

mdconfig -d -u 0

using "0" for md0, "1" for md1, etc.

Print to screen all the directories above the pwd, showing: mountpoints, symbolic links, and permissions (with colors)
2013-07-25 22:55:08
User: malathion
Functions: screen
Tags: sed namei

Useful for finding out quickly if you're still in the same filesystem or are in a descendant of a symbolic link or mountpoint. For plain text output, unset the color substitutions or strip them from the function.

for f in .; do awk 'BEGIN {sum=0;flag=0} {sum=sum+$1; if (flag == 0) { print $1"\t"sum > "cumulative.'$f'" } if (sum > 100) flag=1 }' $f; done
rsstail -o -n 1 --f 'RedditQuote: {title}' http://www.reddit.com/r/quotes/new/.rss
2014-01-08 15:33:48
User: Youpfu

The rsstail is the python version (python-rsstail). The final command pipe it on every new line to gammu and a connected phone

rsstail -o -n 1 --f 'RedditQuote: {title}' http://www.reddit.com/r/quotes/new/.rss | while read line; do /usr/bin/gammu --sendsms TEXT +*yournumber* -text "$line"; done
rsync -avz --dry-run /somewhere/source_directory /somewhereelse/target_directory
2014-04-01 20:55:59
User: tsener
Functions: rsync
Tags: diff rsync

--dry-run will only show you which files would be otherwise synced with rsync.

-z is for compressio

-v vervose

-a "as is" - permissions, ownership etc.

find . | grep -v svn
2011-01-16 03:51:57
User: gwchamb
Functions: find grep
Tags: grep

Unless you have files that include 'svn' in them, this should provide enough information to be useful. If you need to be certain, add the leading dot in the search pattern

skill -KILL -t ttyS0
2009-05-26 21:47:33
User: jipipayo
Functions: skill

when sometimes do a "w" or "who" command and see an orphan console session from time ago, you could kill with this command.

where ttyS0 its the console to kill.

rxvt-unicode -g 999x999 -sr -depth 32 -bg rg-ba:0000/0000/0000/dddd +sb -T irssi -n irssi -name irssichat -e ssh server.com -Xt screen -aAdr -RR irssi irssi
2009-07-30 04:53:17
User: MTecknology
Functions: screen ssh

This will launch and irssi session on your server. If it's not running, it will create the session. If it's running it'll connect to it and destroy any other connections. If compositing is available, the rxvt window will have transparency added. This window will also open maximized. Anything else this does should be easily figured out in the man pages.

aptitude search ~d<string>
2011-08-02 05:19:13

Especially useful for latex packages, which are listed in the description of their Ubuntu package E.g. say I want to find the Ubuntu package containing latex package aeguill:

aptitude search ~daeguill

p texlive-lang-french - TeX Live: French

cvs checkout -l project/src/
du -hs `du -sk * | sort -rn | cut -f2-`
awk 'BEGIN {count=0;prev=-1} {if(count>0) { if(int($1/100) > int(prev/100)) {print $1} } ; prev=$1; count++}' inputFile > rounded
CMD=chrome ; ps h -o pmem -C $CMD | awk '{sum+=$1} END {print sum}'
nohup gnome-open . 0</dev/null 1>/dev/null 2>/dev/null&
2010-03-22 07:19:37
User: drunkcoder
Functions: nohup

this will open the current directory in nautilus detached from your terminal.

cat input.txt | sed 's/\\\033[^a-zA-Z]*.//g'
2011-10-13 14:46:03
User: evolix

Permit to generate a password for userPassword in ldap.

Use ?slappasswd -g? to generate a random passowrd.

perl -ne 's/\^.{1,7}?m//g;print'
2012-01-02 01:32:33
User: Tracerneo
Functions: perl
Tags: perl regex colors

Removes special characters (colors) in '^]]Xm' and '^]]X;Ym' format from file.

Use pipe ('input | perl [...]') or stream ('perl [...]

You can use 'cat -v infile' as 'input' to show special characters instead of interpreting (there is problem with non-ASCII chars, they are replaced by M-[char]).