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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 - 11,605 results
du -sh some/directory
2010-02-21 02:08:28
User: Jacolyte
Functions: du

Displays only the subtotal size of a directory with the -s option, and in human readable format.

ssh -X johndoe@123.456.789
2011-05-19 21:28:25
User: evandrix
Functions: ssh

To start X11 display only on your local machine: xeyes &

Extensions to basic command: ssh -X -f user@remotehost xcalc -bg black -fg green

xdg-open http://xkcd.com/
2010-08-25 19:14:11


To get a random xkcd comic:

xdg-open http://dynamic.xkcd.com/random/comic/
psg() { ps aux | grep "[${1[1]}]${1[2,-1]}"; }
2009-09-07 04:37:11
User: jedahan
Functions: grep ps

alias ps?='psg' for maximum hawtness. Works in bash or zsh.

for %f in (c) do dir %f:\*.jpg /s /p
2009-05-05 18:28:18
User: copremesis
Functions: dir

there is no explicit find command in DOS you can create a batch file with this one and find all jpegs on the C drive ...

note: if creating a batch file "find.bat" the syntax changes to:

for %%f in (c) do dir %%f:\%1 /s /p

you can then use

find *.jpg
for f in *; do mv $f <target_path>; done;
2009-07-09 12:07:49
User: fritz_monroe
Functions: mv

In my job I often have to deal with moving 100,000 files or more. A mv won't do it because there are too many. This will move everything in the current directory to the target path.

ifconfig | grep addr:192 | sed s/Bcast.*// | sed 's/^.*inet addr://'
2010-03-26 07:37:21
User: hasenj
Functions: grep ifconfig sed

This assumes your local ip starts with 192.something (e.g. 192.168), it greps ifconfig output for an ip that starts with 192, then strips the extra garbage (besides the ip)

Maybe `ifconfig | grep addr | grep Bcast` would also do it

for x in *.ogg; do ffmpeg -i "$x" "`basename "$x" .ogg`.mp3"
declare -i i; i=0; for file in *; do i=`expr $i+1`; mv "$file" $i; done;
2010-08-26 12:24:38
User: themiurgo
Functions: file mv

Renames files in a directory to incremental numbers, following alphabetic order. The command does not maintain extensions.

rm -rf `find ./ -iname *.svn*`
declare -i i=0 ; for file in * ; do i=$[$i+1] ; mv "$file" $i; done
say sofa king great
2010-07-30 17:11:45
User: scotbuff

Just type it and hit enter and you will get it.

find directory/ |xargs grep -i "phrase"
ps aux | grep 'httpd ' | awk {'print $2'} | xargs kill -9
cat /etc/debian_version
2009-08-05 14:47:05
User: caiosba
Functions: cat

Easy way to find out what Debian version your machine is running

sudo alien --to-deb Your_PackAge.rpm
2009-09-27 13:49:07
User: eastwind
Functions: sudo

convert to debian package file (deb) a redhat package file (rpm) , then you can install it by using dpkg , require alien package ( sudo apt-get install alien first )

man inet
for file in `find . -iname "FILENAME"`; do cat $file | sed "s/SEARCH_STRING/REPLACE_STRING/" > $file.tmp; mv $file.tmp $file; done
logs=$(find . -name *.log);for log in $logs; do cat /dev/null > $log;done
2009-03-04 10:05:48
Functions: cat find

This find files of name like *.log and truncates them.

2012-08-02 21:10:23
User: mpb

When searching in vi, the search string gets highlighted but the highlighting can become a nuisance.

By searching for the very unlikely pattern "^~" the highlighting is effectively switched off.

while true; do wget -r -l1 --no-clobber -A.txt http://911.wikileaks.org/files/index.html; done; cat *.txt | grep pass
ls -l `locate your_search_here`
2009-11-27 05:53:46
User: tjcertified
Functions: ls

This command lists extended information about files, i.e. whether or not it is a true file or link, who owns it, etc. without having to 'ls' from the specific directory. If you know the filename, but not the location, this helps with finding other information about the file. It can be truncated by creating an alias for 'ls -l'. The sample output shows difference in regular locate vs. ls + locate.

sed '${LINE}d' ~/.ssh/known_host
2012-01-16 18:00:12
User: lucasrangit
Functions: sed

When you SSH to a server who's hostname or IP has changed since the last time a connection was recorded in the known_hosts file a warning will be displayed since this indicated a possible DNS spoofing attack. If this is a known change then this command will remove the previous entry and allow the SSH connection. The SSH client will prompt you as if it was the first time connected to the server.

Replace ${LINE} with the line of the offending key in ~known_hosts. 49 in the sample output.

echo "13" | ed /etc/services
2011-09-15 19:37:49
User: muonIT
Functions: echo ed
Tags: goto

Nth line of a file - dirty hack way. I haven't used ed in ages ;-)

echo "<your twit>" | wc -c -