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2011-03-12 - Confoo 2011 presentation
Slides are available from the commandlinefu presentation at Confoo 2011: http://presentations.codeinthehole.com/confoo2011/
2011-01-04 - Moderation now required for new commands
To try and put and end to the spamming, new commands require moderation before they will appear on the site.
2010-12-27 - Apologies for not banning the trolls sooner
Have been away from the interwebs over Christmas. Will be more vigilant henceforth.
2010-09-24 - OAuth and pagination problems fixed
Apologies for the delay in getting Twitter's OAuth supported. Annoying pagination gremlin also fixed.




All commands from sorted by
Terminal - All commands - 11,616 results
find . -type f | xargs grep -l "string"
2011-08-30 13:22:42
User: Neo23x0
Functions: find grep xargs

Finds a string in files recursively below the current directory on systems without the "egrep" and its "-r" functionality.

cat file.txt | grep -v /$ > newfile.txt
killall conky
wget -qO- whatismyip.org
echo "A great password" | md5sum
2009-04-24 14:32:56
User: ubersoldat
Functions: echo

You can also use sha1sum and variants for longer passwords

taskkill /F /FI "USERNAME eq Cicciopalla"
2012-02-05 12:00:52
User: 0disse0

The taskkill command has the option of the curve, for a complete list just type: taskkill /? As we know, but to give a practical example, suppose you want to act only on the user's processes Cicciopalla use this command

bm () { ... see description }
chmod 755 $(find public_html -type d)
uname -a
ps aux|grep -i [p]rocessname|awk '{ print $2 }'|xargs kill
ls | sed 's/.*/"&"/'
2010-08-17 15:38:51
User: putnamhill
Functions: ls sed
Tags: sed ls

Looks like you're stuck with sed if your ls doesn't have a -Q option.

dd bs=1 count=32 if=/dev/random 2> /dev/null | md5 | grep -o '\w*'
2009-02-26 12:52:45
User: alexfoo

Might match "ping" and then run it.

echo ?ls -l? | at 10am Jul 21
echo ?ls -l? | at midnight
curl -u user:pass -d status=?I am Tweeting from the shell? http://twitter.com/statuses/update.xml
2013-04-29 10:12:43
User: techie

Now all you have to do is replace user by your twitter username , pass by your password and the text inside status to whatever you wish to set your status too .

It uses cUrl library to post your messsage

sudo alsa force-reload
2009-02-16 03:30:13
User: oreo
Functions: sudo

if you lose your sound, this will restart alsa and you will get your sound back

oumou sangare
crontab -e
lynx -useragent=Opera -dump 'http://www.facebook.com/ajax/typeahead_friends.php?u=4&__a=1' |gawk -F'\"t\":\"' -v RS='\",' 'RT{print $NF}' |grep -v '\"n\":\"' |cut -d, -f2
_ff(){ cd /mnt;echo /mnt/*/* |sed 's/ \/mnt\//\&/g' |sed '/'"$1"'/!d'; cd -;}
2011-12-30 23:25:31
User: argv
Functions: cd echo sed


cd /mnt;

echo /mnt/*/* |sed '

s/ \/mnt\//\&/g;

'|sed '/'"$1"'/!d';

cd -;



case $# in


echo "usage: ff glob [sed-cmds] [--|var-name]"



_ff $1 |sed =



case $2 in

--) _ff $1 |less -SN


*) _ff $1 |sed -n ''"$2"''|tr '\n' '\040' |sed 's/.*/export '"$3"'=\"&/;s/=\" /=\"/;s/ $/\"/' > $HOME/.ff;

case $# in


. $HOME/.ff



sed '

s/export .*=\"/\$'"$3"' = \"/;' $HOME/.ff;\







local a=$HOME;

sed '

s/export /less -n \$/;


' $a/.ff > $a/.v ;

. $a/.v ;


Another approach using ls(1)


_lsl ()


ls -l $3 /mnt/*/$1* 2>/dev/null;


case $# in


echo "usage: lsl pat [ls-options|result-no]";

echo "usage: lsle pat [sed-cmds]"



_lsl $1 |sed =



case $2 in

-*) _lsl $1 $@;;


_lsl $1 |sed 's/.* //;


'"$2"'q' > $HOME/.lsl ;

export v=$(sed 1q $HOME/.lsl);

echo \$v = $v







echo "%s/\$/ /";

echo "%j";

echo "s/^/export v=\"";

echo "s/\$/\"";

echo "s/ \"\$/\"";

echo ".";

echo "wq";



lsl $1 -1 |sed $2 > .lsl&&

exp |ed -s .lsl >&-&&

. .lsl&&

echo \$v = $v;


2009-03-18 00:03:42
User: Zenexer
Functions: top

A simple but effective replacement for ps aux. I used to waste my time running ps over and over; top is the way to go. It also allows complex sorting options. Press q to exit "nicely" (Ctrl + C is always an option, of course). Note that the list updates each second, resorting in the process; if you're trying to grab a specific PID, you might be better off with ps.


Alternatively, htop is available, though it may not come pre-installed. htop is slightly more interactive than top and includes color coding, visuals, and a nice interface for selecting and then killing processes. (Thanks to bwoodacre for this great tool.)