All commands sorted by votes

All commands (14,187)

sorted by

Current directory files and subdirectories ordered by size

Very useful for finding the largest files and subdirectories at any given point. Any user can run it from current location just when need to know their largest files and subtdirectories from a certain point down as well. Show Sample Output
This is sample output - yours may be different.
```
4	mvc_example.php
72	caseconverter
80	contact
248	hangman
```
-1

du -ks * | sort -n

unixmonkey1055 · 2009-02-16 14:18:52 146
Recursive Ownership Change

This will change the ownership of /../../somedirectory as well as all its subdirectories so they will be be owned by user2 - typically used when a directory is owned by root:root
This is sample output - yours may be different.
-1

sudo chown -R user2:user2 /../../somedirectory

bkn390 · 2009-09-23 21:27:45 3
Puts every word from a file into a new line

Puts words on new lines, removing additional newlines.
This is sample output - yours may be different.
-1

< <infile> tr ' \t' '\n' | tr -s '\n' > <outfile>

qubyte · 2009-07-07 01:17:47 7
Convert ogg to mp3

Converts all ogg files to mp3 files in the current directory.
This is sample output - yours may be different.
-1

for x in *.ogg; do ffmpeg -i "$x" "`basename "$x" .ogg`.mp3"; done

Superhuman · 2009-09-04 20:23:09 7
Delete files and directories from current directory exept those specified
This is sample output - yours may be different.
-1

rm -R `ls | egrep -v 'dir1|dir2|file1'`

killman · 2011-08-07 08:34:17 3
Open Port Check

Open Port Check
This is sample output - yours may be different.
-1

netstat -an | grep --color -i -E 'listen|listening'

opexxx · 2013-03-19 08:53:47 6
Retrieve Plesk Admin Password

I'm sure almost everybody knows this by now. This command will pull the password for the admin login of any plesk machine. Show Sample Output
This is sample output - yours may be different.
```
[hostname.com]# cat /etc/psa/.psa.shadow
thisismylamepassword
```
-1

cat /etc/psa/.psa.shadow

jigglebilly · 2009-04-30 18:08:12 4
create a motion jpeg (MJPEG) with the jpg file from current directory with mencoder

syntax : mencoder mf://filemask -mf option availble for mf : * w=value : the width of the output, by d?fault : autodetected * h=value : height of the output, by default : autodetected * fps=value : framerate of the output, by default : 25 * type=value : file format type input , avaible: jpeg, png, tga, sgi
This is sample output - yours may be different.
-1

mencoder mf://image1.jpg,image2.jpg,image3.jpg -mf w=800:h=600:fps=25:type=jpeg -ovc copy -oac copy -o output.avi

eastwind · 2009-10-21 09:17:22 3
Export/Backup a PostgreSQL database
This is sample output - yours may be different.
-1

pg_dump -U postgres [nomeDB] > db.dump

michelem · 2009-02-06 15:45:03 12
Dump HTTP header using lynx or w3m

Without the -dump option the header is displayed in lynx. You can also use w3m, the command then is w3m -dump_head http://www.example.com/ Show Sample Output
This is sample output - yours may be different.
```
HTTP/1.1 200 OK
Date: Tue, 31 Mar 2009 18:14:46 GMT
Server: Apache/2.2.3 (CentOS)
Last-Modified: Tue, 15 Nov 2005 13:24:10 GMT
ETag: "b80f4-1b6-80bfd280"
Accept-Ranges: bytes
Content-Length: 438
Connection: close
Content-Type: text/html; charset=UTF-8
```
-1

lynx -dump -head http://www.example.com/

penpen · 2009-03-31 18:41:36 6
Provide a list of all ELF binary objects (executable or libs) in a directory

This is a dirty raw way to simply list ELF objects in a folder. The output is ready to be parsed i.e to the stripper or what else needs a path to an ELF object. Show Sample Output
This is sample output - yours may be different.
```
karmic@linux64:/home/karmic64/Test$ file /usr/bin/* | grep ELF | cut -d":" -f1 
/usr/bin/a2p
/usr/bin/aacplusenc
/usr/bin/aconnect
/usr/bin/acpi_fakekey
/usr/bin/acpi_listen
/usr/bin/addpart
/usr/bin/addr2line
/usr/bin/alsamixer
/usr/bin/amdcccle
/usr/bin/amidi
/usr/bin/amixer
/usr/bin/animate
/usr/bin/aplay
/usr/bin/aplaymidi
/usr/bin/appres
/usr/bin/apt-cache
```
-1

file /usr/bin/* | grep ELF | cut -d":" -f1

LucaCappelletti · 2010-02-17 14:01:52 3
Remove blank lines from a file

To save the result, redirect the output to another file. grep -v "^$" file1 > file2
This is sample output - yours may be different.
-1

grep -v "^$" file

hkyeakley · 2009-02-19 18:11:58 9
Remove an old gmetric statistic

The -d flag sets the lifetime of a metric and defaults to 0 hence why old metrics continue to be graphed in the dashboard. Submitting a dummy value and short lifetime ensures that the metric is removed from the dashboard.
This is sample output - yours may be different.
-1

gmetric -n $METRIC_NAME -v foo -t string -d 10

root · 2009-05-29 14:21:24 7
Capitalize the word with dd
This is sample output - yours may be different.
-1

echo capitalize | { dd bs=1 count=1 conv=ucase 2> /dev/null; cat ;}

twfcc · 2009-09-05 01:49:53 40
Find iPod's fwguid

This is a bit of a hack, but it will get your fwguid which is needed sometimes when using your iPod. Show Sample Output
This is sample output - yours may be different.
```
000A27001BB1BE3F
```
-1

lsusb -v | grep -o "[0-9A-Z]{16}"

matthewbauer · 2009-11-22 00:58:00 4
Send and streamming video to web

Is a simple script for video streaming a movie
This is sample output - yours may be different.
-1

cat video.ogg | nc -l -p 4232 & wget http://users.bshellz.net/~bazza/?nombre=name -O - & sleep 10; mplayer http://users.bshellz.net/~bazza/datos/name.ogg

el_bazza · 2010-11-29 03:34:31 5
OSX - Function to list all members for a given group

Group membership in OS X is a mish-mash of standards that end up meaning there's almost a half-dozen of ways to belong to a group, what with group inheritance and automatic assignment. This means there's no easy command to find out all groups a user belongs to. The only sensible way then is to list all users and then query each user for membership. NOTE: This is a function. Once input you can execute it by calling with a groupname. Show Sample Output
This is sample output - yours may be different.
```
members groupname
user1
user2
user5
```
-1

members () { dscl . -list /Users | while read user; do printf "$user "; dsmemberutil checkmembership -U "$user" -G "$*"; done | grep "is a member" | cut -d " " -f 1; };

eduo · 2012-05-20 11:34:33 7
Recursivly search current directory for files larger than 100MB
This is sample output - yours may be different.
-1

tree -ah --du . | ack '\[(\d{3,}M|\d+.*G)\]'

scottaj2 · 2013-07-29 21:09:13 6
Delete all local git branches that have been merged and deleted from remote
This is sample output - yours may be different.
-1

git branch -d $( git branch -vv | grep '\[[^:]\+: gone\]' | awk '{print $1}' | xargs )

gtron · 2019-12-22 15:48:54 92
PlayTweets from the command line

This will play the audio goodness posted up on PlayTweets via twitter right form the ever loving cmdline. You do not even need a twitter account. I hashed this out in a bit of a hurray as the kids need to get to sleep....I will be adding a loop based feature that will play new items as they come in...after what your are listening to is over. http://twitter.com/playTweets for more info on playtweets Show Sample Output
This is sample output - yours may be different.
```
The sound of the urls being played to you.
```
-1

vlc $(curl -s http://twitter.com/statuses/user_timeline/18855500.rss|grep play|sed -ne '/<title>/s/^.*$http.*$<\/title/\1/gp'|awk '{print $1}')

tomwsmf · 2009-03-02 05:36:19 13
Show display type
This is sample output - yours may be different.
-1

ioreg -lw0 | grep IODisplayEDID | sed "/[^<]*</s///" | xxd -p -r | strings -6

unixmonkey4003 · 2009-05-29 18:52:12 4

print statistics about users' connect time

'ac' is included in the package 'acct', which is described as "The GNU Accounting utilities for process and login accounting". Other interesting flags are: * print statistics for a specified user ac -d username * print statistics for all the users ac -p With my command, the output is also printed in a sexagesimal, more readable, style. Show Sample Output

-1

ac -d | awk '{h=int($NF); m=($NF-h)*60; s=int((m-int(m))*60); m=int(m); print $0" = "h"h "m"m "s"s "}'

karpoke · 2010-06-24 08:08:41 7

Gather libraries used and needed by a binary
This is sample output - yours may be different.
-1

for lib in `readelf -d /usr/bin/abiword | grep NEEDED | cut -f2 -d[ | cut -f1 -d]`; do [ -e /usr/lib/$lib ] && j=/usr/lib/$lib || j=`locate -l 1 $lib`; readlink -f $j ; done

bandie91 · 2010-10-31 20:01:24 4
Count httpd processes

Returns the number of running httpd processes Show Sample Output
This is sample output - yours may be different.
```
21
```
-1

pidof httpd | wc -w

eneko · 2011-02-24 16:46:46 61
Count httpd processes

this version is going to work on redhat/centos/suse AND ubuntu/debian systems Show Sample Output
This is sample output - yours may be different.
```
9
```
-1

pgrep -c 'httpd|apache2'

linuxrawkstar · 2011-02-24 18:03:00 30
‹ First < 465 466 467 468 469 > 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

Search for packages, ranked by popularity

This will take the packages matching a given `apt-cache search` query (a collection of AND'd words or regexps) and tell you how popular they are. This is particularly nice for those times you have to figure out which solution to use for e.g. a PDF reader or a VNC client. Substitute "ubuntu.com" for "debian.org" if you want this to use Ubuntu's data instead. Everything else will work perfectly.

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

ROT13 using the tr command

Converts a single FLAC file with associated cue file into multiple FLAC files

Converts a single FLAC file with associated cue file into multiple FLAC files. Takes two arguments: the name of the FLAC file and and the name of the cue file. Example: flacAlbumToFiles foo.flac foo.cue Requires: - cuetools - shntools

Increase SCT of external USB disk enclosure to one hour.

So I had this 2TB Seagate external disk/USB enclosure which by default would spin-down its internal drive (it enters a standby mode) after four minutes of inactivity.. Spinning-up the inactive drive was an annoying delay when accessing files and also it severely interfered with NFS.. SCT stands for "Standby Condition Timer". To completely disable SCT: $ sdparm --clear STANDBY -6 /dev/sdb To return to original (default) SCT settings: $ sdparm -D -p 0x1a -6 /dev/sdb To verify the settings (before and after): $ sdparm -a /dev/sdb No need for vendor-provided MSWIN tools, etc.

List docker volumes by container

Convert seconds to [DD:][HH:]MM:SS

Create backup copy of file, adding suffix of the date of the file modification (NOT today's date)

When I go to change a configuration file I always like to make a backup first. You can use "cp -p" to preserve the modification time, but it gets confusing to have file.prev, file.prev2, etc. So I like to add a YYMMDD suffix that shows when the file was last changed. "stat -c %Y" gives you the modification time in epoch seconds, then "date -d @" converts that to whatever format you specify in your "+format" string.

Prettify XML in pipeline

xmllint2 comes with GNU libxml2 library. (based on: http://vim.wikia.com/wiki/Format_your_xml_document_using_xmllint)

Geolocate a given IP address

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

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