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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!

Top Tags





Maintained by Jon H.

Site originally by David Winterbottom (user root).

Psst. Open beta.

Wow, didn't really expect you to read this far down. The latest iteration of the site is in open beta. It's a gentle open beta-- not in prime-time just yet. It's being hosted over at UpGuard (link) and you are more than welcome to give it a shot. Couple things:

  • » The open beta is running a copy of the database that will not carry over to the final version. Don't post anything you don't mind losing.
  • » If you wish to use your user account, you will probably need to reset your password.
Your feedback is appreciated via the form on the beta page. Thanks! -Jon & CLFU Team

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Terminal - All commands - 12,388 results
egrep -ie "<*HREF=(.*?)>" index.html | awk -F\" '{print $2}' | grep ://
caff <keyid>
2009-02-18 14:09:03
User: raphink
Tags: GPG

Requires: signing-party (on Debian).

Note: you need a working MTA on your machine.

curl queip.tk/ip
alias :q='tput setaf 1; echo >&2 "this is NOT vi(m) :/"; tput sgr0'
2009-12-08 12:59:44
User: sputnick
Functions: alias echo tput
Tags: vim alias vi tput

For vi(m) users :

Add it in your ~/.bashrc

Add an "exit" @ the end if you are masochist ;)

tune2fs -l /dev/XXXX | grep -w ^"Block size:"
2011-02-10 16:39:14
User: ncaio
Functions: grep tune2fs

the result of the command helped a check the Maximum file size and Maximum file system size.

EXT3 Exemple:

Block size; MAX File size; Maximum file system size

1 KiB; 16 GiB ; 2 TiB

2 KiB ; 256 GiB ; 8 TiB

4 KiB ; 2 TiB ; 16 TiB

8 KiB[limits 1]; 2 TiB; 32 TiB

for i in $(wget -O- -U "" "http://wallbase.cc/random/23/e..." --quiet|grep wallpaper/|grep -oe 'http://wallbase.cc[^"]*'); do wget $(wget -O- -U "" $i --quiet|grep -oe 'http://[^"]*\.jpg');done
watch -n -0.1 fbcmd stream timeline
2013-04-20 17:36:18
User: hako
Functions: watch

Streams your timeline on the commandline, required fbcmd


function ends_in_y() { case $(date +%A) in *y ) true ;; * ) false ;; esac } ; ends_in_y && echo ok
2010-04-06 22:18:52
Functions: date echo false true

The shell has perfectly adequate pattern matching for simple expressions.

VARNAMES='ID FORENAME LASTNAME ADDRESS CITY PHONE MOBILE MAIL' ; cat customer.csv | while read LINE ; do COUNT=1 ; for VAR in $VARNAMES ; do eval "${VAR}=`echo $LINE | /usr/bin/awk {'print $'$COUNT''}`" ; let COUNT=COUNT+1 ; done ; done
2009-05-19 11:23:00
User: GeckoDH
Functions: cat eval read


cat customer.csv | while read LINE ; do


for VAR in $VARNAMES ; do

eval "${VAR}=`echo $LINE | /usr/bin/awk {'print $'$COUNT''}`"




Maybe you have a CSV-File with addresses, where you have to process each contact (one per line, write each value to own variable). Of course you can define every variable, but this way is more simple and faster (to write).

VARNAMES includes the variable names. Pay attention: the number of names in VARNAMES have to be the same than in the CSV-file the fields. If the CSV is not seperated with ";", you can set the seperator after the awk-binary with -F"_" for example.

svn co http://simile.mit.edu/repository/crowbar/trunk&& cd ./trunk/xulapp/ xulrunner --install-app && Xvfb :1 && DISPLAY=:1 xulrunner application.ini 2>/dev/null 1>/dev/null && wget -O- ""
2010-10-16 05:12:11
User: argv
Functions: cd wget

some other options:



much more with piggybank as scraper

works well with your favourite curses or non-curses http clients

VBoxManage storageattach "volpedimongibello" --storagectl "fighetto" --port 1 --device 0 --type dvddrive --medium "/tanto/mipaghi/tutto.iso
2012-01-31 14:42:54
User: 0disse0

was inspired by http://www.commandlinefu.com/commands/view/8936/boot-from-a-block-device-without-giving-root-privilege-to-virtual-box

volpedimongibello= virtual machine name

fighetto= controller name

tutto.iso= DVD iso image

How to remove the DVD:

VBoxManage storageattach "volpedimongibello" --storagectl "fighetto" --port 1 --device 0 --type dvddrive --medium none

2009-02-13 21:58:42
User: Aldiansblog

When you need to work a long time in the same directory, which prompt is of the type:


it is better to hide all this with the command PS1='$'

To retrieve a normal prompt, type: PS1='$PWD$ '

sudo pmset -a hibernatemode 1
2009-06-20 22:52:10
Functions: sudo

sudo pmset -a hibernatemode 1 sets hiberate on.

sudo pmset -a hibernatemode 0 sets hibernate off.

from the pmset man page:

0001 (bit 0) enables hibernation; causes OS X to write memory state to

hibernation image at sleep time. On wake (without bit 1 set) OS X will

resume from the hibernation image. Bit 0 set (without bit 1 set) causes

OS X to write memory state and immediately hibernate at sleep time.

I often change my MacBook's sleep state. So I created a function for bash to make it a little easier.


hibernate (on | off)

"hibernate on" will set your laptop to hibernate if the lid is closed.

"hibernate off" will set your laptop to sleep if the lid is closed.

### note : "proper" indentation isn't preserved on the website

function hibernate()


case "${1}" in


sudo pmset -a hibernatemode 1

echo Hibernate mode on.



sudo pmset -a hibernatemode 0

echo Hiberate mode off.



echo "I'm sorry Dave, but I can't do that."




To make things easier, add the proper line in your /etc/sudoers file so that your user may invoke pmset without a password. Here's how mine looks:

bwayne luna = NOPASSWD: /usr/bin/pmset

Don't forget that you must edit sudoers with `sudo visudo` from Terminal.app, and not by another text editor.

Sorry this is so Mac OS specific.

for /L %%x in (1,1,16) do mkdir %%x & curl -R -e http://www.kirtu.com -o %%x/#1.jpg http://www.kirtu.com/toon/content/sb%x/english/sb%x_en_[001-070].jpg
2009-12-08 15:01:16
User: MyTechieself
Functions: mkdir

Bulk downloads the comic strip JPG files for the adult cartoon Savitabhabhi, storing each set in it's own folder. Requires manual removal of "non-image" files that maybe created because each series may differ in length. The command can be easily adapted for UNIX flavours. You need to have cURL in your path.

security unlock-keychain; security find-generic-password -ga "/Users/mruser/.ssh/id_dsa" 2>&1 > /dev/null
2010-02-02 21:14:57

This must be run the first time while logged into your Mac desktop, as it will graphically prompt for access permissions. Subsequent uses will not prompt, assuming you select "Always allow".

ps -C apache o pid= | sed 's/^/-p /' | xargs strace
mysql -uUser -pPassword -N -s -r -e 'SHOW PROCESSLIST' | grep -cv "SHOW PROCESSLIST"
2011-06-10 13:00:53
Functions: grep

Counts Mysql Threads

mysql switches

-N skip column names (remove headers)

-s silent mode (removes separator chars)

-r raw output

-e execute

grep switches

-c count lines

-v invert match (match all except)

find . -name unit-test -o -name '*.c' -o -name '*.cpp' | egrep -v "unit-test|android"
scrot -e 'mv $f \$HOME/shots/; sitecopy -u shots; echo "\$BASE/$f" | xsel -i; feh `xsel -o`'
2009-03-26 12:08:39
User: penpen
Functions: echo

Here $HOME/shots must exist and have appropriate access rights and sitecopy must be correctly set up to upload new screen shots to the remote site.

Example .sitecopyrc (for illustration purposes only)

site shots

server ftp.example.com

username user

password antabakadesuka

local /home/penpen/shots

remote public_html/shots

permissions ignore

The command uses scrot to create a screen shot, moves it to the screen shot directory, uploads it using screen uses xsel to copy the URL to the paste buffer (so that you can paste it with a middle click) and finally uses feh to display a preview of the screen shot.

Note that $BASE stands for the base URL for the screen shots on the remote server, replace it by the actual location; in the example http://www.example.com/~user/shots would be fitting.

Assign this command to a key combination or an icon in whatever panel you use.

awk '{if (NR % 3 == 1) print $0}' foo > foo_every3_position1; awk '{if (NR % 3 == 2) print $0}' foo > foo_every3_position2; awk '{if (NR % 3 == 0) print $0}' foo > foo_every3_position3
2010-01-08 04:20:06
User: oshazard
Functions: awk

awk extract every nth line.

Generic is:

awk '{if (NR % LINE == POSITION) print $0}' foo

where "last" position is always 0 (zero).

for url in `cat urls `; do title=`curl $url 2>&1 | grep -i '<title>.*</title>'` && curl $url > /tmp/u && mail -s "$title" your-private-instapaper-address@instapaper.com < /tmp/u ; done
2010-10-16 19:10:19
Functions: grep mail

Note, you need to replace the email address with your private Instapaper email address.

There are a bunch of possible improvements such as,

- Not writing a temp file

- Doesnt strip tags (tho Instapaper does thankfully)

- Shouldnt require 2 curls

find / -type f -name IMG_????.JPG -print0 |xargs -0 exiv2 -g Exif.Canon.ModelID '{}' |grep A520 |rev |cut --complement -d " " -f1-40 |rev |xargs -I {} cp --parents {} /where
2012-03-10 03:01:01
User: fladam
Functions: cp cut find grep rev xargs

You must spezify /where folder and / folder

If you have another camera you must experiment with Exif data (after -g and after grep) and mask of your photo files IMG_????.JPG

I have do it on Knoppix 6.7.0

You must have installed exiv2.

echo foo | ncat [ip address] [port]
2012-10-26 10:53:47
User: dragonauta
Functions: echo

you can use a pair of commands to test firewalls.

1st launch this command at destination machine

ncat -l [-u] [port] | cat

then use this command at source machine to test remote port

echo foo | ncat [-u] [ip address] [port]

First command will listen at specified port.

It will listen TCP. If you use -u option will listen UDP.

Second command will send "foo" through ncat and will reach defined IP and port.

perl -ne 'print "$. - $_"' infile.txt
2009-12-08 15:27:39
User: netp
Functions: perl

This command prints all lines of a file together with is line number.

curl -s http://twitter.com/users/show.xml?screen_name=username | sed -n 's/\<followers_count\>//p' | sed 's/<[^>]*>//g;/</N;//b'
2010-10-17 16:08:46
User: chrismccoy
Functions: sed
Tags: twitter

replace username with the username you wish to check.