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commandlinefu.com is the place to record those command-line gems that you return to again and again.

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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.
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All commands from sorted by
Terminal - All commands - 12,372 results
perl -e 'printf join ".", map int rand 256, 1 .. 4;'
geoip() { lynx -dump "http://api.hostip.info/get_html.php?ip=$1&position=true"; }
0

Defines a function to geolocate a given IP address; if none supplied, will default to your external IP address.

perl -MAcme::POE::Tree -e 'Acme::POE::Tree->new()->run()'
IMG="image.img";PART=1;mount -o loop,ro,offset=$(parted $IMG -s unit b print|awk '$1=='$PART' {sub(/B/,"",$2);print $2}') $IMG /mnt/whatever
2011-12-31 14:58:18
User: AndroTux
Functions: awk mount
0

Mounts a disk-image of a hdd with partitions

import unicodedata; map(unicodedata.name, '\u2022'.decode('ascii'))
paste -sd, <<< $'line1\nline2'
2012-11-13 01:26:05
User: kodango
Functions: paste
Tags: paste
0

A more simple way to join lines with paste command than sed.

cut -f 2 -d ':' oclHashcat.pot | egrep -oi '[a-z]{1,20}' | sort | uniq > base.pot
mencoder -speed 2 -o output.avi -ovc lavc -oac mp3lame input.avi
exiv2 -M"set Exif.Photo.DateTimeOriginal `date "+%Y:%m:%d %H:%M:%S"`" filename.jpg
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
0

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.

`ls`
2009-08-17 03:56:05
User: matthewbauer
Tags: wildcard
0

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
0

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
0

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

\cp something toSomeWhereElse
2010-09-25 03:07:04
User: xakon
0

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
0

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
0

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 192.168.1.0/24 | awk "/^Host/"'{ print $3 }' |nawk -F'[()]' '{print $2}'
2011-12-31 15:50:22
User: cantormath
Functions: awk
0

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 (192.168.1.100-110).

sed -i -e '1i \# -*- coding: utf-8 -*-' yourfile.py
2012-05-15 14:54:06
User: igniteflow
Functions: sed
0

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
0

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
0

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'