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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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equery s | sed 's/(\|)/ /g' | sort -n -k 9 | gawk '{print $1" "$9/1048576"m"}'
2009-07-30 01:12:10
User: Alanceil
Functions: gawk sed sort

On a Gentoo system, this command will tell you which packets you have installed and sort them by how much space they consume. Good for finding out space-hogs when tidying up disk space.

2009-08-17 03:56:05
User: matthewbauer
Tags: wildcard

This is exactly the same as a wildcard - good for times when wildcards are disabled and when you want have a wildcard of a directory that is not your current ({`ls /path/to/dir`}). Does not work on older versions of Bash though.

perl -le 'use Config; foreach $i (keys %Config) {print "$i : @Config{$i}"}'
2009-09-22 22:14:21
User: chuckr
Functions: perl
Tags: perl

This dumps all of your installed perl's config information.

for item in *;do echo -n "$item - ";find "$item" -type f -print0 | xargs -0 file -iNf - | grep video | cut -d: -f1 | xargs -d'\n' /usr/share/doc/mplayer/examples/midentify | grep ID_LENGTH | awk -F= '{sum+=$2} END {print(sum/60)}'; done | grep -v ' - 0$'
2009-11-19 06:28:15
User: jnash
Functions: awk cut echo file grep xargs

I know this has been beaten to death but finding video files using mime types and printing the "hours of video" for each directory is (IMHO) easier to parse than just a single total. Output is in minutes.

Among the other niceties is that it omits printing of non-video files/folders

PS: Barely managed to fit it within the 255 character limit :D

instapaper-add(){ curl -s -d username="$1" -d password="$2" -d url="$3" https://www.instapaper.com/api/add; }
2010-03-21 23:01:38
User: matthewbauer

Adds URL to Instapaper.


instapaper-add user@example.com 12345 http://www.commandlinefu.com/

\cp something toSomeWhereElse
2010-09-25 03:07:04
User: xakon

If the problem is an aliased synonym for a command, you can still execute the original command by pre-pending it with a reverse-slash '\'. This works at least in Bash, but I guess the aliasing system refers definitely to Bash (and not only).

kill -9 `ps xawo state=,pid=|sed -n 's/Z //p'`
2010-10-27 07:38:07
User: AskApache
Functions: kill sed

just a leaner, smaller version. Love the original idea!

gawk 'BEGIN {RS="\n\n"; if (ARGV[1]=="-i")IGNORECASE=1;ARGC=1}{if (IGNORECASE)Text[tolower($0)]=$0;else Text[$0]=$0 };END {N=asort(Text);for(i=1;i<=N;i++)printf "%s\n\n",Text[i]}' -i<Test.txt
2011-05-11 01:03:30
User: IF_Rock
Functions: gawk

Sorts blank line delimited paragraphs. '-i' -- case insensitivity option -- removes redundant paragraphs in a case insensitive way, and then sorts in a case insensitive way.

If you search CommandLineFu with multiple anded terms searches, redundancy can ensue. This sorts the retrieved text (among other kinds of data), and removes the redundancy.

nmap -sP | awk "/^Host/"'{ print $3 }' |nawk -F'[()]' '{print $2}'
2011-12-31 15:50:22
User: cantormath
Functions: awk

Often you want to nmap a list of IPs using the -iL flag. This is an easy way to generate a list of IPs that are online in a specific subnet or IP range (

sed -i -e '1i \# -*- coding: utf-8 -*-' yourfile.py
2012-05-15 14:54:06
User: igniteflow
Functions: sed

Useful when specifying char encoding for Python and/or your editor

ip a s eth0 | awk '/inet / {print $2} | sed -e 's/\/..//g'
mplayer $(find . -iname '*.avi' | shuf -n1)
lp -dhp -P1-1 -o media=a4 *
2013-07-26 00:09:56
User: alphabraga
Functions: lp

Very usefull script to use when uoy must print all files from a directory.

for file in "$@"; do name=$(basename "$file" .webm) echo ffmpeg -i $file -vn -c:a copy $name.ogg ffmpeg -i "$file" -vn -c:a copy "$name.ogg" done
2013-10-05 14:49:07
User: hoodie
Functions: basename echo file

Strips the audio track from a webm video. Use this in combination with clive or youtube-dl.

watch -n1 iptables -vnL
jhead -autorot -ta+1 *
rpm -ivh 'http://www.website.com/path/to/desired_software_package.rpm'
ioreg -l -p IODeviceTree | grep -o EFI[0-9]. && system_profiler SPSoftwareDataType |grep 64
perl -le 'print join $/, @INC'
2009-09-22 22:18:35
User: chuckr
Functions: join perl

This will show where your Perl installation is looking for modules.

echo start > battery.txt; watch -n 60 'date >> battery.txt'
2009-10-18 07:00:26
User: m33600
Functions: echo watch

Fully recharge your computer battery and start this script.

It will create or clean the file named battery.txt, print a start on it and every minute it will append a time stamp to it.

Batteries last few hours, and each hour will have 60 lines of time stamping. Really good for assuring the system was tested in real life with no surprises.

The last time stamp inside the battery.txt file is of interest. It is the time the computer went off, as the battery was dead!

Turn on your computer after that, on AC power of course, and open battery.txt. Read the first and last time stamps and now you really know if you can trust your computer sensors.

If you want a simple line of text inside the battery.txt file, use this:

watch -n 60 'date > battery.txt'

The time of death will be printed inside

purple-remote "setstatus?status=Available&message=Checking libpurple"
xmms2 info $(xmms2 mlib search '<query>' | sed -ne 's/^00*\([1-9][0-9]*\).*$/\1/p') | awk -F' = ' '$1~/ url$/{print$2}'
pkill -f <process name>
2010-06-19 02:36:31
User: eikenberry
Tags: kill ps killall

Using -f treats the process name as a pattern so you don't have to include the full path in the command. Thus 'pkill -f firefox' works, even with iceweasel.

sed -i '$a\FOOBAR' *
tag() { local t="$HOME/tags/$1"; [ -d $t ] || mkdir -p $t; shift; local i; for i in $*; do ln -s $(readlink -f $i) $t;done}
2012-02-10 15:43:02
Functions: ln mkdir readlink

shell function which allows you to tag files by creating symbolic links directories in a 'tags' folder.

The tag function takes a tag name as its first argument, then a list of files which take that tag. The directory $HOME/tags/tagname will then hold symbolic links to each of the tagged files. This function was modified from bartonski's (http://www.commandlinefu.com/commands/view/10216) inspired by tmsu (found at https://bitbucket.org/oniony/tmsu/wiki/Home) with readlink function by flxndn (http://www.commandlinefu.com/commands/view/10222).


tag dog airedale.txt .shizturc weimeraner.pl

This will create $HOME/tags/dog which contains symbolic links to airedale.txt .shizturc and weimeraner.pl