All commands sorted by votes

All commands (14,187)

sorted by

Clear disk space by retaining only currently running Docker containers and only currently required Docker images.

Useful if your Docker host starts running out of disk space due to Docker debris. You should start by running "sudo docker ps" in order to check that all required containers are in fact running, and fix any that aren't before proceeding to the main event! "sudo docker rm $(sudo docker ps -q -f status=exited)" removes all containers which are no longer running. "sudo docker rmi $(sudo docker images -q -f dangling=true)" removes all Docker images not required for currently running containers.
This is sample output - yours may be different.
0

sudo docker rm $(sudo docker ps -q -f status=exited); sudo docker rmi $(sudo docker images -q -f dangling=true)

Roundand · 2017-04-25 11:29:19 23
show mysql process ids

Show Sample Output
This is sample output - yours may be different.
```
2
3131
3210
5633
6032
6061
6375
6588
6772
7092
7499
7663
```
0

mysql -s -e "show processlist" |awk '{print $1}'

aravind040 · 2009-05-27 07:22:05 5
Search for specific IPs taken form a text file within the apache access log

bnd-ips.txt is a list of IP adresses that is concenated for use as regular expression. Yes, this is still very speedy ;=)
This is sample output - yours may be different.
0

grep -E ":(`cat bnd-ips.txt | sed 's/\./\\./g' | tr '\n' '|'`)" access.log

Cowboy · 2009-07-30 12:54:55 6
Visualizing system performance data

draw `vmstat ` data using gnuplot
This is sample output - yours may be different.
0

vmstat 2 10 | awk 'NR > 2 {print NR, $13}' | gnuplot -e "set terminal png;set output 'v.png';plot '-' u 1:2 t 'cpu' w linespoints;"

Sunng · 2009-09-23 07:19:47 3
Search pattern case insensitive
This is sample output - yours may be different.
0

:/\c{pattern}

yohananov · 2010-03-22 11:23:08 3
List file/directories in order of last accessed, in human readable terms

Especially useful with a command line podcatcher like Mashpodder. Show Sample Output
This is sample output - yours may be different.
```
drwxr-xr-x 2 mark users 4.0K Mar 29 23:01 LottaLinuxLinks
drwxr-xr-x 2 mark users 4.0K Mar 29 21:53 x11r5Radio
drwxr-xr-x 2 mark users 4.0K Mar 29 21:53 TLLTS
drwxr-xr-x 2 mark users 4.0K Mar 29 21:53 Linux.Outlaws.Ogg
```
0

ls -lth podcasts/

ricemark20 · 2011-03-30 18:47:02 3
Quick enter into a single screen session
This is sample output - yours may be different.
0

alias screenr='screen -r $(screen -ls | egrep -o -e '[0-9]+' | head -n 1)'

yababay · 2011-05-12 05:44:39 5
Power cd - Add a couple of useful features to 'cd'

Move efficiently between directories. . This command adds a couple of extra features to cd, without affecting normal use. CDPATH use is also unaffected. It introduces and environment variable CDDIR which is used as an alternate home directory. . Note: I don't want to alter $HOME because then all my dot files will move. . Examples: . cd dir Change directory to "dir" (using CDPATH if necessary) . cd dir/file.txt Change directory to "dir" (containing folder of "file.txt") This allows you to cut'n'paste, or use . CDDIR is unset cd Change directory to $HOME . CDDIR=/home/flatcap/work cd Change directory to /home/flatcap/work . For convenience, put the command, and the following, in your .bashrc or .bash_profile export CDDIR="/home/flatcap/work" alias cdd="CDDIR=$(pwd)" Show Sample Output
This is sample output - yours may be different.
```
~$ export CDDIR=/home/flatcap/work
~$ cd
~/work$ unset CDDIR
~/work$ cd
~$
```
0

cd() { if [ -n "$1" ]; then [ -f "$1" ] && set -- "${1%/*}"; else [ -n "$CDDIR" ] && set -- "$CDDIR"; fi; command cd "$@"; }

flatcap · 2011-06-24 08:48:13 10
find broken symbolic links

find broken symbolic links Show Sample Output
This is sample output - yours may be different.
```
lrwxrwxrwx 1 nobody nobody 43 2010-03-15 13:00 /mnt/retorn -> /opt/retorn
```
0

find . -type l | (while read FN ; do test -e "$FN" || ls -ld "$FN"; done)

pathcl · 2011-08-02 14:48:47 5
Upload documents from linux to MS SHarepoint using curl

Use Curl to upload documents from your linux servers to MS Sharepoint servers.
This is sample output - yours may be different.
0

curl --ntlm -u <your Active-Directory-Domain>/<your-domain-username> -T /path/to/local/$FILE http://sharepoint.url.com/doc/library/dir/

barnesmjsa · 2011-09-08 18:08:58 3
Push to all remote repos with git
This is sample output - yours may be different.
0

git remote | xargs -n 1 git push

rickard2 · 2012-02-11 17:41:52 3
pdftk append with handles
This is sample output - yours may be different.
0

pdftk A=1.pdf B=2.pdf C=3.pdf cat C A output CA.pdf

bossNova · 2012-03-28 15:41:44 22
List all symlinks and see where they link to
This is sample output - yours may be different.
0

find -type l | xargs ls -l

samer · 2012-05-15 22:34:51 3
Find the 10 lusers winners of the "I take up the most disk space" award

the -h option of du and sort (on appropriate distrib) makes output "Human" readable and still sorted by "reversed size" (sort -rh) Show Sample Output
This is sample output - yours may be different.
```
55G	/home/user32
19G	/home/user45
6.7G	/home/user89
16M	/home/user02
64K	/home/user57
```
0

du -sh /home/*|sort -rh|head -n 10

toaster · 2012-09-12 11:54:06 5
avoid ssh hangs using jobs

Execute commands serially on a list of hosts. Each ssh connection is made in the background so that if, after five seconds, it hasn't closed, it will be killed and the script will go on to the next system. Maybe there's an easier way to set a timeout in the ssh options...
This is sample output - yours may be different.
0

for host in $MYHOSTS; do ping -q -c3 $H 2>&1 1>/dev/null && ssh -o 'AllowedAuthe ntications publickey' $host 'command1; command2' & for count in 1 2 3 4 5; do sleep 1; jobs | wc -l | grep -q ^0\$ && continue; done; kill %1; done

a8ksh4 · 2012-11-13 23:12:27 5
Go get those photos from a Picasa album (full size)
This is sample output - yours may be different.
0

wget -O - "[PICASA ALBUM RSS LINK]" |sed 's/</\n</g' | grep media:content |sed 's/.*url='"'"'$[^'"'"']*$'"'"'.*$/\1/' |awk -F'/' '{gsub($NF,"d/"$NF); print $0}'|wget -i -

mxac · 2013-03-16 15:48:41 4
vi show line numbers

Prints line numbers making it easier to see long lines that wrap in your terminal and extra line breaks at the end of a file. :set nu works too. Show Sample Output
This is sample output - yours may be different.
```
1 sample text file
2 blah blah blah
3 last line
4
```
0

:set number

sonic · 2013-10-07 15:03:52 6
Remove all .DS_Store files from the current directory (recursive)

May require GNU find.
This is sample output - yours may be different.
0

find . -name "*.DS_Store" -type f -delete

nicolasmccurdy · 2014-07-16 02:03:38 8
This command uses dd, pv, and dialog command to display an updated progress bar while using the dd command. This is useful to see the status of a dd in progress when creating very large dumps or coping hard disk devices using dd command.
This is sample output - yours may be different.
0

(pv -n /dev/sda | dd of=/dev/sdb bs=128M conv=notrunc,noerror) 2>&1 | dialog --gauge "Running dd command (cloning), please wait..." 10 70 0

skinners · 2014-11-07 16:24:26 13
function: permanent alias

Yes, it is not a command. Yes, you need to add it to your init script. Yes, you need to define $SH_ALIASES filename. But this shit can be very useful.
This is sample output - yours may be different.
0

function cmd () {echo 'alias '$1'="'${@:2}'"' >> $SH_ALIASES; . $SH_ALIASES }; . $SH_ALIASES;

romgrk · 2015-06-28 21:21:52 9
Diff two directories by finding and comparing the md5 checksums of their contents.

Results will be shown in columns. Only different files and files in one directory that is not in the other will be shown.
This is sample output - yours may be different.
0

diff -y --suppress-common-lines <(sort -k2 <(md5deep -r -b directory1)) <(sort -k2 <(md5deep -r -b directory2))

MeLoPasoPipa · 2016-08-18 09:17:16 12
Make color transparent
This is sample output - yours may be different.
0

mogrify -path ../png_transparent/ -fuzz 3.4% -transparent "#50566b" *.png

ceddi · 2016-10-17 19:49:04 17
Display which distro is installed

Cleaner than the top alternative Show Sample Output
This is sample output - yours may be different.
```
Distributor ID:	Debian
Description:	Debian GNU/Linux 8.7 (jessie)
Release:	8.7
Codename:	jessie
```
0

test `uname` = Linux && lsb_release -a 2>/dev/null || ( test `uname` = SunOS && cat /etc/release || uname -rms )

amhhhhhhh · 2017-04-25 13:35:40 21
Silently Execute a Shell Script that runs in the background and won't die on HUP/logout
This is sample output - yours may be different.
0

(nohup your-command your-args &>/dev/null &)

socketz · 2018-05-23 17:35:43 192
Force file system check
This is sample output - yours may be different.
0

touch /forcefsk

rimaya · 2009-02-06 09:19:46 11
‹ First < 461 462 463 464 465 > 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

check open ports without netstat or lsof

Perpetual calendar

Gets any date since today. Other examples of recognized expressions are "2 years 4 days ago", "7 months" (in the future), "next Sunday", "yesterday", "tomorrow", etc.

Count the total amount of hours of your music collection

First the find command finds all files in your current directory (.). This is piped to xargs to be able to run the next shell pipeline in parallel. The xargs -P argument specifies how many processes you want to run in parallel, you can set this higher than your core count as the duration reading is mainly IO bound. The -print0 and -0 arguments of find and xargs respectively are used to easily handle files with spaces or other special characters. A subshell is executed by xargs to have a shell pipeline for each file that is found by find. This pipeline extracts the duration and converts it to a format easily parsed by awk. ffmpeg reads the file and prints a lot of information about it, grep extracts the duration line. cut and sed cut out the time information, and tr converts the last . to a : to make it easier to split by awk. awk is a specialized programming language for use in shell scripts. Here we use it to split the time elements in 4 variables and add them up.

Apply permissions only to files

To apply only to dirs: $ chmod 755 $(find . -type d) Use -R parameters for recursive walk.

Color man pages

Add the followin to ~/.bashrc #colour export LESS_TERMCAP_mb=$'\E[01;31m' export LESS_TERMCAP_md=$'\E[01;37m' export LESS_TERMCAP_me=$'\E[0m' export LESS_TERMCAP_se=$'\E[0m' export LESS_TERMCAP_so=$'\E[01;44;33m' export LESS_TERMCAP_ue=$'\E[0m' export LESS_TERMCAP_us=$'\E[01;32m'

Write comments to your history.

A null operation with the name 'comment', allowing comments to be written to HISTFILE. Prepending '#' to a command will *not* write the command to the history file, although it will be available for the current session, thus '#' is not useful for keeping track of comments past the current session.

Install pip with Proxy

Installs pip packages defining a proxy

Rotate a set of photos matching their EXIF data.

You need jhead package.

Purge configuration files of removed packages on debian based systems

Purge all configuration files of removed packages

Print today's date in ISO format without calling an external command (bash 4)

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