All commands sorted by votes

All commands (14,187)

sorted by

Create new repo in Cobbler for CentOS 5.3 updates

Add a repo to cobbler. To download all the repository contents the command is: cobbler reposync
This is sample output - yours may be different.
-1

cobbler repo add --name=CentOS-5.3-i386-updates --mirror=http://mirror3.mirror.garr.it/mirrors/CentOS/5.3/updates/i386/

w00binda · 2009-04-27 10:18:45 5
Today's date on a yearly calendar...

Show today date on a yearly calendar.
This is sample output - yours may be different.
-1

cal -y

andrepuel · 2009-09-02 12:57:23 49
Show apps that use internet connection at the moment.

Can be used to discover what programms create internet traffic. Skip the part after awk to get more details. Has anyone an idea why the uniq doesn't work propperly here (see sample output)? Show Sample Output
This is sample output - yours may be different.
```
java          
pidgin         
pidgin         
pidgin         
pidgin         
pidgin         
thunderbird-b 
thunderbird-b 
thunderbird-b 
thunderbird-b 
```
-1

netstat -lantp | grep -i establ | awk -F/ '{print $2}' | uniq | sort

ktoso · 2009-09-19 13:54:36 7
Weather on the Command line

Will return temperature in Fahrenheit of a location (New York City in example). Uses a Google API. Show Sample Output
This is sample output - yours may be different.
```
35
```
-1

curl -s "http://www.google.com/ig/api?weather=New%20York" | sed 's|.*<temp_f data="$[^"]*$"/>.*|\1|'

matthewbauer · 2010-02-08 23:06:48 5
Merge tarballs

You don't need to create an intermediate file, just pipe the output directly to tar command and use stin as file (put a dash after the f flag).
This is sample output - yours may be different.
-1

cat 1.tar.gz 2.tar.gz | tar zxvif -

psychopenguin · 2010-05-09 03:50:00 5
Scroll a message in a terminal titlebar

Usage: titlescroll "message" <width> Requires command "xtitle" or replace with: echo -ne "\e]0;TEXT_HERE\007"
This is sample output - yours may be different.
-1

function titlescroll { _X=0 _TITLEMSG=$1 _WIDTH=${2:-16} _TITLEMSG=`printf "%$((${#_TITLEMSG}+$_WIDTH))s" "$_TITLEMSG"` while `true` do _X=$(((_X+1)%${#_TITLEMSG})) xtitle "${_TITLEMSG:_X:_WIDTH}" done }

romulusnr · 2010-01-12 20:48:46 3
Remove Thumbs.db files from folders
This is sample output - yours may be different.
-1

find ./ -name Thumbs.db -exec rm -rf '{}' +

thameera · 2010-08-18 02:55:38 6
Remove duplicate lines using awk
This is sample output - yours may be different.
-1

!a[$0]++

Dawn_of_the_Dead · 2014-03-16 01:50:30 6
Alternative way to get the root directory size in megabytes
This is sample output - yours may be different.
-1

expr $(fdisk -s ` grep ' / ' /etc/mtab |cut -d " " -f1`) / 1024

ncaio · 2009-05-21 17:25:38 6
do a full file listing of every file found with locate

Escapes spaces in paths.
This is sample output - yours may be different.
-1

locate -i yourfilename | sed 's/ /\\ /g' | xargs ls -lah | less

unixmonkey23919 · 2011-07-26 13:00:39 4
Get current stable kernel version string from kernel.org

Fetches latest stable release version from first entry between tags Show Sample Output
This is sample output - yours may be different.
```
3.12.5
```
-1

curl -s -k https://www.kernel.org/feeds/kdist.xml | sed -n -e 's@.*<guid>$.*$</guid>.*@\1@p' | grep 'stable' | head -1 | awk -F , '{print $3}'

Wafelijzer · 2013-12-17 23:59:27 7
Format a flooppy with windows compatible disk

The 1440 is the number of bytes, and the A: specifies the floppy drive.
This is sample output - yours may be different.
-1

mformat -f 1440 A:

eastwind · 2009-12-10 06:51:20 3
[Gentoo] Input modules, commented, in your module.autoload file

Whenever you compile a new kernel, there are always new modules. The best way to make sure you have the correct modules loaded when you boot is to add all your modules in the modules.autoload file (they will be commented) and uncomment all those modules you need. Also a good way to keep track of the available modules in your system. For other distros you may have to change the name of the file to /etc/modprobe.conf Show Sample Output
This is sample output - yours may be different.
```
# /etc/modules.autoload.d/kernel-2.6:  kernel modules to load when system boots.
#
# Note that this file is for 2.6 kernels.
#
# Add the names of modules that you'd like to load when the system
# starts into this file, one per line.  Comments begin with # and
# are ignored.  Read man modules.autoload for additional details.

# For example:
# aic7xxx
# mixer-oss.ko
# pcm-oss.ko
# seq-device.ko
# seq-oss.ko
# snd-seq.ko
```
-1

find /lib/modules/`uname -r`/ -type f -iname '*.o' -or -iname '*.ko' |grep -i -o '[a-z0-9]*[-|_]*[0-9a-z]*\.ko$' |xargs -I {} echo '# {}' >>/etc/modules.autoload.d/kernel-2.6

paragao · 2010-01-13 02:12:08 4
Function to bind MySQL hostport to forward remote MySQL connection to localhost.

Create a secure tunnelled connection for access to a remote MySQL database. For example, connect with MySQL Workbench to root@127.0.0.1:13306. Show Sample Output
This is sample output - yours may be different.
```
$ sshmysql [user@]remote-server
[1] 10653
```
-1

sshmysql() { ssh -L 13306:127.0.0.1:3306 -N $* & }

peterRepeater · 2011-09-01 10:21:55 8
show your locale language keyboard setting

Show Sample Output
This is sample output - yours may be different.
```
gnu@robby:~$ locale | grep LANG=
LANG=fr_BE.UTF-8
```
-1

locale | grep LANG=

eastwind · 2009-12-10 07:24:01 5
Play newest or random YouTube video

newly downloaded videos goyoutube random goyoutube rand This command assumes you've already downloaded some YouTube .mp4 or .flv video files via other means. Requires 'shuf', or your own stdin shuffler.
This is sample output - yours may be different.
-1

goyoutube() { d=/path/to/videos p=$d/playlist m=$d/*.mp4 f=$d/*.flv if [ "$1" == 'rand' ]; then ls -1 $m $f | shuf >$p else ls -1t $m $f >$p fi mplayer -geometry 500x400 -playlist $p }

meathive · 2010-04-11 18:53:49 4
Testing
This is sample output - yours may be different.
-1

who am i | wc -l

himanshu · 2012-03-20 10:32:17 5
View the list of files and directories in an archive with less.

This will print out the files and directories in a gzipped tarball.
This is sample output - yours may be different.
-1

less file.tar.gz

allbad · 2009-03-15 23:00:05 15
All IP connected to my host

find all computer connected to my host through TCP connection Show Sample Output
This is sample output - yours may be different.
```
81.91.145.204
85.133.199.175
85.185.21.146
91.186.200.13
91.189.90.40
91.98.155.188
91.99.41.81
92.50.59.10
94.182.63.188
```
-1

netstat -nut | awk '$NF=="ESTABLISHED" {print $5}' | cut -d: -f1 | sort -u

bitbasher · 2011-07-27 07:24:10 3
Sum up total size and count of all certain filename pattern/regex
This is sample output - yours may be different.
-1

find -regextype posix-egrep -regex ".*/[A-Z]{3}_201009[0-9]{2}.*" -printf "%f %s\n" | awk '{ SUM += $2;COUNT++ } END { print SUM/1024 " kb in " COUNT " files" }'

taintedkernel · 2010-09-21 15:41:45 3
Run a second copy of Firefox using the same profile on Mac OS X
This is sample output - yours may be different.
-1

(cd /Applications/Firefox.app/Contents/MacOS; ./firefox-bin -p default --no-remote)

DEinspanjer · 2009-02-18 21:35:02 5
Unlock your KDE4 session remotely (for boxes locked by KDE lock utility)

With this you can unlock your KDE4 session via SSH, via mobile phone SSH or e. g. scheduled task in crontab (without asking password). Useful when you need to grant somebody access to your locked profile remotely. Create an alias (e. g. as "unlock") and use with remote KDE4 lock. This works only on KDE4 boxes because KDE 3 is using utility with another name. Tested on Kubuntu 8.10.
This is sample output - yours may be different.
-1

killall -s 9 krunner_lock

b2e · 2009-05-21 22:29:06 7
List all available commands
This is sample output - yours may be different.
-1

in bash hit "tab" twice and answer y

sdadh01 · 2009-11-12 17:55:37 4
x bottles of beer on the wall graph

Will create a graph of the results for "x bottles of beer on the wall". Requires Gnuplot. Inspired by an xkcd comic: http://xkcd.com/715/ For sample output see: http://tr.im/xbottlesofbeer Show Sample Output
This is sample output - yours may be different.
```
See http://tr.im/xbottlesofbeer
```
-1

(echo "plot '-' with lines"; for x in $(seq 1 100); do curl -s "http://ajax.googleapis.com/ajax/services/search/web?v=1.0&q=$(echo $x bottles of beer on the wall|sed 's/ /%20/g')"|sed 's/.*"estimatedResultCount":"$[^"]*$".*/\1\n/';done)|gnuplot -persist

matthewbauer · 2010-03-17 21:04:36 4
Remove executable bit from all files in the current directory recursively, excluding other directories, firm permissions

forces user to rw, group to r, and other to no access. files will not be marked executable. directories will be executable for users and groups only. Show Sample Output
This is sample output - yours may be different.
```
-rw-r-----   1 www-data www-data 3353273 Jun 21 17:58 XP_Help_20100621.zip
drwxr-x---   8 www-data www-data    4096 Jun  3  2009 Widgetized_HomePage
drwxr-x---  12 www-data www-data    4096 Jan 12  2010 Wizard_Old_Concept
drwxr-x---   5 www-data www-data    4096 Oct 21  2009 Wizard_New_Concept
```
-1

chmod -R u=rw-x+X,g=r-x+X,o= .

donnoman · 2010-07-16 18:42:00 5
‹ First < 494 495 496 497 498 > 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

Solaris get PID socket

Command line to get which PID is opening a socket on IP and PORT. Only useful under Solaris.

Show IP Address in prompt --> PS1 var

when working with many machines in a computer lab need to know the IP addr is very large, this is a simplistic solution to make things easier

Display calendar with specific national holidays and week numbers

NB when you run this gcal command in your shell, holidays are highlighted but this highlighting does not show in the sample output (above). To find full details on gcal options: gcal --long-help | less Example for United States, Pennsylvania: gcal -K -q US_PA 2009 # display holidays in USA/Pennsylvania for 2009 (with week numbers) Example for Hong Kong: gcal -K -q HK 2009 # display holidays in Hong Kong for 2009 (with week numbers)

Google URL shortener

Shorter and made into a function.

Create the signature base string required for a Twitter stream feed

This is the SECOND command in a set for five that are needed for a Twitter stream feed. This command creates variable "b", the so-called "base string" required for oauth in Twitter stream feed requests. (The 256 char limit prevents giving it a better name) We use five environment variables created by a previous step: id, k1, once, ts and k3. The five environment variables are created in a separate command, please see my other commands. For more information on the signature base string, see dev.twitter.com/apps, click on any app (or create a new one) and then go to the "OAuth Tool" tab.

list block devices

Shows all block devices in a tree with descruptions of what they are.

Batch rename extension of all files in a folder, in the example from .txt to .md

Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

Write on the console without being registered

http://www.linux-party.com/index.php/8157-escribir-en-la-consola-linux-sin-que-quede-registrado-en-el-history

Check if your desired password is already available in haveibeenpwnd database. This command uses the API provided by HIBP

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