All commands

All commands (14,187)

sorted by

UNIX one-liner to kill a hanging Firefox process

The description of how the one-liner works is here at my blog: http://jugad2.blogspot.com/2008/09/unix-one-liner-to-kill-hanging-firefox.html Show Sample Output
This is sample output - yours may be different.
```
Imaging a Firefox window disappearing :-)
(It kills the hanging firefox process.)
```
-2

kill -HUP ` ps -aef | grep -i firefox | sort -k 2 -r | sed 1d | awk ' { print $2 } ' `

vasudevram · 2009-02-07 10:10:45 21
search package descriptions (apt)

Search the names and descriptions of all available packages and prints out the name and the short description.
This is sample output - yours may be different.
0

apt-cache search someregex

chrisdrew · 2009-02-07 09:15:19 22
Add audio CD to xmms2 playlist
This is sample output - yours may be different.
0

xmms2 addpls cdda://

orie · 2009-02-07 08:42:50 37
umount all nfs mounts on machine
This is sample output - yours may be different.
-2

mount | grep : | tr -s ' ' -d 3 | xargs umount -v

rajaseelan · 2009-02-07 04:56:26 11
See the top 10 IP addresses in a web access log
This is sample output - yours may be different.
2

# cut -d ' ' -f1 /var/log/nginx/nginx-access.log | sort | uniq -c | sort -nr | head -10 | nl

msisk · 2009-02-07 00:22:11 12
E-mail a traditional Berkeley mbox to another recipient as individual e-mails.
This is sample output - yours may be different.
1

formail -Y -s /usr/sbin/sendmail bar@example.com < /var/mail/foo

abcde · 2009-02-06 23:37:24 10
Make a thumbnail image of first page of a PDF.

convert is included in ImageMagick. Don't forget the [X] (where X is the page number). [0] is the first page of the PDF.
This is sample output - yours may be different.
5

convert -resize 200 -sharpen 40 some_file.pdf[0] some_file.jpg

abcde · 2009-02-06 23:12:01 13
date offset calculations

The date command does offset calculations nicely, handles concepts like "a month" as you'd expect, and is good for offsets of at least 100M years in either direction. Show Sample Output
This is sample output - yours may be different.
```
Fri Jan 23 14:53:27 CST 2009
```
3

date --date="1 fortnight ago"

mkc · 2009-02-06 20:57:59 11
View latest apache access log

This command opens the latest, most current rotating apache access log for visual analysis and inspection. Run this command from the apache log directory. For error logs, replace access_log with error_log.
This is sample output - yours may be different.
0

view `ls -1 access_log.* | tail -n 1`

jimjmarion · 2009-02-06 18:38:25 17
Display a list of upgradeable packages (apt)

apt-show-versions is a program that shows what packages in the system may be updated and several useful information. The -u option displays a list of upgradeable packages: From: http://www.debian.org/doc/manuals/apt-howto/ch-helpers.en.html Show Sample Output
This is sample output - yours may be different.
```
libeel0/unstable upgradeable from 1.0.2-5 to 1.0.2-7
libeel-data/unstable upgradeable from 1.0.2-5 to 1.0.2-7
```
-3

apt-show-versions -u

cowholio4 · 2009-02-06 17:56:13 12
Backup the first 1MB of your volume

This will copy the first 1MB of your /dev/sdX volume to your /root/sdX.bin file, where SDX is the name of the device you wish to copy the data from (Usually a hard disk) NOTE: Make sure you capitalize the M in field for BS. Show Sample Output
This is sample output - yours may be different.
```
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0718711 seconds, 14.6 MB/s
```
-4

dd if=/dev/sdX of=/root/sdX.bin bs=1M count=1

dhing · 2009-02-06 17:45:59 188
Import/clone a Subversion repo to a git repo
This is sample output - yours may be different.
2

git svn --authors-file=some-authors-file clone svn://address/of/svn/repo new-git-dir

Pistos · 2009-02-06 17:31:36 13
Undo several commits by committing an inverse patch.

Use this to make a new commit that "softly" reverts a branch to some commit (i.e. squashes the history into an inverse patch). You can review the changes first by doing the diff alone.
This is sample output - yours may be different.
4

git diff HEAD..rev | git apply --index; git commit

Pistos · 2009-02-06 17:29:46 12
resize(1/2) the image using imagemagick
This is sample output - yours may be different.
1

convert -resize 50%x50% image{,_resize}.jpg

aoiaoi · 2009-02-06 17:25:50 11
Serve one or more git repositories

Use this to start git daemon serving all git repos under a path. Show Sample Output
This is sample output - yours may be different.
```
(git daemon has no startup output)
```
0

git daemon --reuseaddr --verbose --export-all --base-path=/parent/of/bare/git/repos

Pistos · 2009-02-06 17:25:04 11
Live filter a log file using grep and show x# of lines above and below
This is sample output - yours may be different.
4

tail -f <filename> | grep -C <# of lines to show above and below> <text>

manalang · 2009-02-06 17:19:01 11
change to the selected directory for zsh users

Show Sample Output
This is sample output - yours may be different.
```
$ cd programs/
$ cd
$ scd 
0       ~
1       ~/programs
select number:
```
0

alias scd='dirs -v; echo -n "select number: "; read newdir; cd -"$newdir"'

aoiaoi · 2009-02-06 16:44:47 15
search user defined function in c language
This is sample output - yours may be different.
1

cflow file.c | grep ':$' | sed 's/ <.*//'

aoiaoi · 2009-02-06 16:18:28 11
Adhoc tar backup

Creates a quick backup with tar to a remote host over ssh.
This is sample output - yours may be different.
1

tar -cvzf - /source/path | ssh <targethostname> -l <username> dd of=/destination/path/backupfile.tgz

smm · 2009-02-06 15:52:09 12
Analyze, check, auto-repair and optimize Mysql Database

A useful way to do a full check and auto repair damaged databases
This is sample output - yours may be different.
2

mysqlcheck -a --auto-repair -c -o -uroot -p [DB]

michelem · 2009-02-06 15:49:16 17
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
Use last argument of last command

Bash shortcut to work with the last argument of your last command Show Sample Output
This is sample output - yours may be different.
```
$ ls /etc/apache2/httpd.conf-example
/etc/apache2/httpd.conf-example
$ file !$
file /etc/apache2/httpd.conf-example
/etc/apache2/httpd.conf-example:        ascii text
```
15

file !$

leprasmurf · 2009-02-06 15:41:08 17
Get a process's pid by supplying its name
This is sample output - yours may be different.
1

pidof () { ps acx | egrep -i $@ | awk '{print $1}'; }

pmbuko · 2009-02-06 15:33:46 12

Quick command to check if Perl library is installed on your server. Show Sample Output

perl -e "use SOAP::Lite"

leprasmurf · 2009-02-06 15:26:37 16

The top ten commands you use

Show Sample Output
This is sample output - yours may be different.
```
3940 ls
1427 sudo emerge -vpuDN world
1084 top
 684 tail /var/log/samba/log.smbd -n 50
 601 sudo emerge --sync
 573 sudo emerge --depclean
 566 ls -alh
 561 df -ah
 523 cd
 430 sudo revdep-rebuild
```
2

perl -pe 's/.+;//' ~/.zsh_history | sort | uniq -c | sort -r|head -10

aoiaoi · 2009-02-06 15:24:32 172
‹ First < 556 557 558 559 560 > 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

Look for English words in /dev/urandom

Little faster alternative.

Watch postgresql calls from your application on localhost

It's certainly not nicely formatted SQL, but you can see the SQL in there...

Find usb device

I often use it to find recently added ou removed device, or using find in /dev, or anything similar. Just run the command, plug the device, and wait to see him and only him

Exit mc with 2 keystrokes

For those who like to hit instead of typing "exit" to leave the shell and find it annoying that it doesn't work in Midnight Commander, just press to switch to the subshell and now you can leave with

Convert deb to rpm

converts between Red Hat rpm, Debian deb, Stampede slp, Slackware tgz, and Solaris pkg file formats ... It also supports LSB packages.

Generate binary sequence data

run command on a group of nodes in parallel

The pee command is in the moreutils package.

dd with progress bar

piping through 'pv' shows a simple progress/speed bar for dd. This is a replacement for my otherwise favorite 'while :;do killall -USR1 dd;sleep 1;done'

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

ensure your ssh tunnel will always be up (add in crontab)

I find it ugly & sexy at the same time isn't it ?

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