All commands sorted by votes

All commands (14,187)

sorted by

Hello world

Pi also says hello world!
This is sample output - yours may be different.
0

pi 62999 | tr 0-9 del\ l\!owrH

maurol · 2011-07-29 22:47:53 4
generate random string
This is sample output - yours may be different.
0

python -c 'import string, random; print "".join(random.choice(string.letters+string.digits) for x in range(6))'

kev · 2011-11-16 17:22:39 22
list all users with UID bigger than 999 in /etc/passwd

To distinguish normal users from system users. Specify an UID, to list all all users with UID bigger than that in /etc/passwd.
This is sample output - yours may be different.
0

awk -F: '$3 > 999 { print $1 }' /etc/passwd

rockenrola · 2011-12-30 14:47:10 3
Nice way to view source code

Uses pygments ( http://pygments.org/ ) to highlight the source code and a less pipe to scroll and show line numbers of the code.
This is sample output - yours may be different.
0

show_code() { pygmentize $1 | less -N }

Flow · 2012-05-12 09:18:33 4
Change owner ship of files from 1003 to android under current directory recursively. 1003/android could be customized.
This is sample output - yours may be different.
0

find . | while read line; do test `stat -c %u $line` -eq 1003 && chown android:android $line && echo $line; done

changyuheng · 2013-01-12 10:47:25 7
Watch your websites php

Shows files and processes of the command php
This is sample output - yours may be different.
0

watch -d=c -n3 'lsof -itcp -iudp -c php'

AskApache · 2013-03-14 01:24:50 4
Getting OpenPGP keys for Launchpad PPAs on Debian based systems from behind a firewall

If you are an unlucky soul behind a corporate firewall you will likely find that downloading gpg keys is blocked. This is because the hkp protocol uses port 11371 by default to transfer the key. By adding "hkp://" to the beginning of the hostname and ":80" to the end you are asking gpg to try using port 80 to connect (less likely to be blocked by a firewall). This relies on the remote server answering to requests over port 80. Show Sample Output
This is sample output - yours may be different.
```
Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /tmp/tmp.wuFtC4zNMi --trustdb-name /etc/apt/trustdb.gpg --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --keyserver hkp://keys.gnupg.net:80 --recv-keys 1C4CBDCDCD2EFD2A
gpg: requesting key CD2EFD2A from hkp server keys.gnupg.net
gpg: key CD2EFD2A: public key "Percona MySQL Development Team <mysql-dev@percona.com>" imported
gpg: Total number processed: 1
gpg:               imported: 1
```
0

sudo apt-key adv --keyserver hkp://keys.gnupg.net:80 --recv-keys [key to get here]

phattmatt · 2013-07-23 08:29:40 7
Remove permissions from directory or file
This is sample output - yours may be different.
0

icacls directory_or_file /remove:g group_or_user

shawn_abdushakur · 2013-10-01 17:52:03 6
Batch Convert SVG to PNG

convert all *.svg to png _in parallel_ this speeds up the conversion for many files, but might also not be feasible for a large number of files
This is sample output - yours may be different.
0

for i in *.svg; do convert "$i" "${i%.svg}.png" & done

robinro · 2014-03-26 15:03:54 7
Re-encode all flac files below

Sometimes I get FLAC files that RhythmBox can't play but VLC can. So I re-encode them using GStreamer at highest compression.
This is sample output - yours may be different.
0

find . -type f -iname '*.flac' | while read i; do mv -- "$i" "$i.tmp"; gst-launch filesrc location="$i.tmp" ! flacdec ! flacenc quality=8 ! filesink location="${i%.tmp}"; rm -- "$i.tmp"; done

qdrizh · 2014-07-10 19:21:22 7
List fonts used by an SVG file

List all fonts used by an SVG file. Useful to find out which fonts you need to have installed in order to open/edit an SVG file appropriately. Show Sample Output
This is sample output - yours may be different.
```
Candara
Caviar Dreams
Chubby Cheeks
ComickBook
Folks
FolksBlack
Folks-Bold
```
0

grep 'font-family:[^;]*' <input file.svg> | sed 's/.*font-family:$[^;]*$.*/\1/g' | sort | uniq

caiosba · 2014-11-03 20:38:08 80
dd copy from sdX to sdY with progressbar
This is sample output - yours may be different.
0

apt-get install pv -y && pv -tpreb /dev/sdX | dd of=/dev/sdY bs=64M

bakroistvan · 2015-02-18 20:09:15 12
aria2c to speedtest connection

Tests connection speed over HTTP request. Can use a lot of http mirrors of SAME file (Useful for test with Ubuntu mirrors, as example) and the split will be done opening connections in all urls if possible. -s Split connections in N number MAX=16 -j Set max concurrent downloads, must be equal to -s or will be restricted to this number. -x Set max connection per server, recommended to be the same of split. -k Min Split Size, default is 20MB, usefull to really force more splited connections over same file -d Directory to save the "file", in this case, /dev -o Points output to null --file-allocation=none Do not attempt to prealocate the file. --allow-overwrite=true Overwrite to /dev/null. Recommend use "rm /dev/null.aria2" after if runned as root. Show Sample Output
This is sample output - yours may be different.
```
[#1 SIZE:85.9MiB/1,097.5MiB(7%) CN:16 SPD:673.2KiBs ETA:25m38s]                                                                                                           
```
0

aria2c -s16 -j16 -x16 -k1M -d /dev -o null --file-allocation=none --allow-overwrite=true <url>

pqatsi · 2015-06-18 13:13:12 9
easily strace all your apache processes

No need for grep or xargs
This is sample output - yours may be different.
0

ps auxw | awk '/(apache|httpd)/{print"strace -F -p " $2}' | sh

AdvancedThreat · 2017-11-26 17:34:41 20

a quick function for searching changed files. just copy it in the bash Show Sample Output

FINDDATE() { LOCATION="${1:-.}"; find ${LOCATION} -type f -print0 | xargs -0 stat -c "%y %n" | sort | sed 's/.$[0-9]$\{9,\} +0[1-2]00/\t/' | sed 's/ /\t/g' }

emphazer · 2018-05-14 14:27:41 166

Autocomplete directories (CWDs) of other ZSH processes (MacOS version)

MacOS Solution due to lack of pidof command and procfs on MacOS Kernel. Show Sample Output
This is sample output - yours may be different.
```
[ name@host ~/scripts ]$ xcd <TAB>
/Users/name/scripts              /Users/name/scripts/Boltdir
/usr/local/bin                   /var/log/
```
0

function _xterm_cwds() { for pid in $(pgrep -x zsh); do reply+=$(lsof -p $pid | grep cwd | awk '{print $9}') done }; function xcd() { cd $1 }; compctl -K _xterm_cwds xcd

cdiehl · 2019-06-15 02:26:11 35
Given NOPASSWD privileges on a remote SSH server, sftp as root via sudo

This requires that your sudo not prompt for a password, as sftp cannot allocate the terminal necessary to ask.
This is sample output - yours may be different.
0

sftp -s "sudo /usr/lib/sftp-server" user@host

mrtheplague · 2009-03-29 07:02:58 6
List all text files (exclude binary files)

List all text files in the current directory.
This is sample output - yours may be different.
0

find . | xargs file | grep ".*: .* text" | sed "s;$.*$: .* text.*;\1;"

matthewbauer · 2009-09-22 01:50:25 8
Get decimal ascii code from character

uses the previous "chr" function and uses it to create the inverse function "ord" by brute force. It's slow, It's inelegant, but it works. I thought I needed ord/chr to do a cartesian cipher in shell script a whie ago, but eventualy I realized I could get fancy with tr and do the same thing...
This is sample output - yours may be different.
0

ord () { seq 1 127 | while read i; do echo `chr $i` $i; done | grep "^$1 " | cut -c '3-' }

infinull · 2009-10-16 21:54:01 4
Clean up formatting of a perl script

By default, perltidy will create a file with the extension '.tdy'.
This is sample output - yours may be different.
0

perltidy foo.pl

bartonski · 2010-07-19 11:51:47 6
For finding out if something is listening on a port and if so what the daemon is.

Gives also the name of the deamon Show Sample Output
This is sample output - yours may be different.
```
$ sudo lsof -i :443
COMMAND  PID     USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
apache2 1018     root    5u  IPv4   4121      0t0  TCP *:https (LISTEN)
apache2 1044 www-data    5u  IPv4   4121      0t0  TCP *:https (LISTEN)
```
0

lsof -i :[port number]

CodSpirit · 2010-08-20 11:14:11 4
Create cheap and easy index.html file

Just to avoid link to itself
This is sample output - yours may be different.
0

F=index.html; for i in *; do [[ $i = $F ]] && continue; echo "<li><a href='$i'>$i</a>"; done >$F

frans · 2011-05-08 20:57:24 5
Print a list of installed Perl modules

Lists all the modules that were installed the "proper way". It also uses Perl 5.10(or higher)'s say command for less typing. Show Sample Output
This is sample output - yours may be different.
```
Algorithm::Diff
Algorithm::NaiveBayes
Alien::Judy
Alien::wxWidgets
Any::Moose
App::FatPacker
App::Nopaste
App::cpanminus
App::perlbrew
AppConfig
Archive::Any
Archive::Extract
Archive::Tar
Archive::Zip
Array::Diff
Array::Iterator
Array::RefElem
Async
```
0

perl -MExtUtils::Installed -E 'say for ExtUtils::Installed->new()->modules()'

kimmel · 2011-11-16 17:26:47 4
Transform an XML document with an XSL stylesheet

The XML document can be transformed to text, XML, HTML or anything else. The --stringparam option allows to set XSL variables externally.
This is sample output - yours may be different.
0

xsltproc --stringparam name value <xsl_stylesheet> <xml_document>

seb1245 · 2012-11-09 15:54:46 6
Random music player
This is sample output - yours may be different.
0

FILE='mp3.list';LNNO=`wc -l $FILE|cut -d' ' -f 1`;LIST=( `cat $FILE` );for((;;)) do SEED=$((RANDOM % $LNNO));RNNO=$(python -c "print int('`openssl rand -rand ${LIST[$SEED]} 8 -hex 2>/dev/null`', 16) % $LNNO");mplayer ${LIST[$RNNO]};sleep 2s; done

randomonkey · 2013-01-12 20:09:51 5
‹ First < 450 451 452 453 454 > Last ›

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Check These Out

Rank top 10 most frequently used commands

umount --rbind mount with submounts

Original: https://bugzilla.redhat.com/show_bug.cgi?id=194342

Remove all the files except abc in the directory

Finds all files in the current directory and deletes them besides file called "abc"

run command on a group of nodes in parallel

generate random password

for Mac OS X

Simple way to envoke a secure vnc session through ssh enabled router.

The ip address is of the remote machine running the vncserver. Must log in first to the router then the VNC session. Very nice if you have open-wrt or dd-wrt on your router.

Show whats going on restoring files from a spectrum protect backup

spectrum protect's dsmc command shows file names and total amount of restore. This command shows which files are actually open and their siz in GB and highlights the change to the previous output

Download all music files off of a website using wget

This will download all files of the type specified after "-A" from a website. Here is a breakdown of the options: -r turns on recursion and downloads all links on page -l1 goes only one level of links into the page(this is really important when using -r) -H spans domains meaning it will download links to sites that don't have the same domain -nd means put all the downloads in the current directory instead of making all the directories in the path -A mp3 filters to only download links that are mp3s(this can be a comma separated list of different file formats to search for multiple types) -e robots=off just means to ignore the robots.txt file which stops programs like wget from crashing the site... sorry http://example/url lol..

Using NMAP to check if a port is open or close

Using NMAP to check to see if port 22(SSH) is open on servers and network devices.

Rename all files in lower case

rename is a really powerfull to, as its name suggests, rename files

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)

All commands (14,187) the last day the last week the last month all time sorted by date votes

What's this?

Check These Out

Stay in the loop…

All commands (14,187)

sorted by