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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 - 11,491 results
gpg --refresh-keys
wb(){ for i in $(wget -O- -U "" "http://wallbase.cc/random/23/eqeq/1920x1080/0/" --quiet|grep wallpaper/|grep -oe 'http://wallbase.[^"]*'); do if (( n > "$1" )); then break;fi;let n++;wget $(wget -O- -U "" $i --quiet|grep -oe 'http://[^"]*\.jpg');done;}
aptitude search \~ilinux-image
gocr -i ~/Screenshot.png
2013-02-28 07:38:13
User: totti

Image to text converter.

Convert your scanned book in image format like .png, .jpg into editable text format.

OCR ==> Optical Code Reader

mate - `find . -name 'filename'`
cat welcome | wall
2009-02-14 18:12:50
User: Williebee
Functions: cat

Show message in file "welcome" to all logged in terminal users.

2009-04-22 06:54:20
User: eastwind

tell you how many Non free software is on your machine, which package it is and which restriction on freedom it has . require vrms package , vrms mean virtual Richard M. Stallman :)

ls | perl -lne '++$x{lc $1} if /[.](.+)$/ }{ print for keys %x'
2010-08-13 20:05:15
User: recursiverse
Functions: ls perl

All with only one pipe. Should be much faster as well (sort is slow). Use find instead of ls for recursion or reliability.

Edit: case insensitive

awk '{if (NR % 2 == 0) print $0}' file.txt
echo '!'whammy
2009-03-26 23:34:33
User: sudopeople
Functions: echo
Tags: literal bang

Seems obvious, but other seemingly simple ways to use it don't work:

echo !whammy


echo "!whammy"

both output:

-bash: !whammy: event not found

and this:

echo "\!whammy"



with the slash :(

you can also do any combinations of quotes for a complex string:

echo "It's great to be able to use a bang ("'!'") in a command"'!'


It's great to be able to use a bang (!) in a command!
s=`head -$i fileName | tail -1`
mkdir ${1..10}
ls -ad .*
2009-02-18 15:22:39
User: osantana
Functions: ls

List only hidden files (or directories). You also can use:

ls -lad .*
rename .txt .md *.txt
2013-09-17 19:15:52
User: fhh

display beautiful tree ... "tree dir" display tree from "dir".

ls | while read -r FILE; do mv -v "$FILE" `echo $FILE | tr -d ' '`; done
2010-08-14 14:10:48
User: IgnitionWeb
Functions: ls mv read tr
Tags: space echo while tr

all files in the directory get moved, in doing so the new name of the file is the original name with out spaces (using translate command)

while true ; do scripts/bootstrap.py ; ./manage.py runserver ; done
2009-03-27 04:43:54
User: taurus
Functions: true

I wrote a script called bootstrap.py to delete the database, then load a new database with initial values. With this single-line shell loop, when I need to make a schema change (which happens often in the early stages of some projects), I hit ctrl-C to stop the running Django server, then watch bootstrap.py do its thing, then watch the server restart.

0,30 * * * * php -q /address/to/script.php
2010-01-11 10:44:13
User: dotanmazor

Just put this line in a file that resides in your /etc/cron.d/ folder, and you're set.

The -q option is used to suppress php headers.

ls -lS
count=`wc -l file | cut -d ' ' -f1`
rec -c 2 -r 44100 -s -t wav - | flac - --sign=signed --channels=2 --endian=big --sample-rate=44100 --bps=16 -f -o file.flac
2011-08-30 03:14:32
User: bohwaz

You'll need to install sox and flac packages in Debian/Ubuntu.

dups() { sort "$@" | uniq -d; }
rm -rf `ls | head -5000`
2009-02-25 22:52:23
User: rockon
Functions: head rm

Deletes thousands of files at one go, I'm not able to recall the exact # of files that rm can delete at one go(apprx. around 7000.)

a=($(ls *html)) && a=${a[$(expr ${#a[@]} - 1)]} && rm $a
2009-10-12 16:40:06
Functions: expr ls rm

plays with bash arrays. instead of storing the list of files in a temp file, this stores the list in ram, retrieves the last element in the array (the last html file), then removes it.

sed -e '/^[[:blank:]]*#/d; s/[[:blank:]][[:blank:]]*#.*//' -e '/^$/d' -e '/^\/\/.*/d' -e '/^\/\*/d;/^ \* /d;/^ \*\//d' /a/file/with/comments
2009-11-10 17:47:22
Functions: sed
Tags: sed PHP

Strips comments from at least bash and php scripts. Normal # and // as well as php block comments

removes all of the:

empty/blank lines

lines beginning with #

lines beginning with //

lines beginning with /*

lines beginning with a space and then *

lines beginning with */

It also deletes the lines if there's whitespace before any of the above.

Add an alias to use in .bashrc like this:

alias stripcomments="sed -e '/^[[:blank:]]*#/d; s/[[:blank:]][[:blank:]]*#.*//' -e '/^$/d' -e '/^\/\/.*/d' -e '/^\/\*/d;/^ \* /d;/^ \*\//d'"