All commands

List mp3 files with less than 320 kbps bitrate.

infojunkie (http://thereisamoduleforthat.com) — Tue, 21 May 2013 04:46:55 +0000

$ find -name '*.mp3' -exec mp3info {} -p "%F: %r kbps\n" \; | sort | sed '/320 kbps/d'

by David Winterbottom (codeinthehole.com)

Recursively search and replace old with new string, inside every instance of filename.ext

eddieb — Mon, 20 May 2013 19:17:10 +0000

$ find . -type f -name filename.exe -exec sed -i "s/oldstring/oldstring/g" {} +;

This is a slightly modified version of http://www.commandlinefu.com/commands/view/4283/recursive-search-and-replace-old-with-new-string-inside-files (which did not work due to incorrect syntax) with the added option to sed inside only files named filename.ext

by David Winterbottom (codeinthehole.com)

Get a list of Mageia Linux mirrors providing rsync connectivity for Mageia 3 release

mpb — Mon, 20 May 2013 16:19:05 +0000

$ url=http://mirrors.mageia.org/api/mageia.3.i586.list; wget -q ${url} -O - | grep rsync:

Need to find a Mageia Linux mirror server providing Mageia 3 via rsync?

Modify the "url=" string for the version you want. This shows i586 which is the 32bit version.

If you want the 64bit version it is:

url=http://mirrors.mageia.org/api/mageia.3.x86_64.list; wget -q ${url} -O - | grep rsync:

by David Winterbottom (codeinthehole.com)

Run the built in PHP-server in current folder

VictorBjelkholm — Sun, 19 May 2013 11:23:17 +0000

$ php -S 127.0.0.1 8080

You must have PHP 5.4.0 or later to be able to run the built in server.

This web server is designed for developmental purposes only, and should not be used in production.

URI requests are served from the current working directory where PHP was started, unless the -t option is used to specify an explicit document root. If a URI request does not specify a file, then either index.php or index.html in the given directory are returned. If neither file exists, then a 404 response code is returned.

If a PHP file is given on the command line when the web server is started it is treated as a "router" script. The script is run at the start of each HTTP request. If this script returns FALSE, then the requested resource is returned as-is. Otherwise the script's output is returned to the browser.

Standard MIME types are returned for files with extensions: .css, .gif, .htm, .html, .jpe, .jpeg, .jpg, .js, .png, .svg, and .txt. The .htm and .svg extensions are recognized from PHP 5.4.4 onwards.

More information here: http://php.net/manual/en/features.commandline.webserver.php

by David Winterbottom (codeinthehole.com)

Avoid killing the X server with CTRL+C on the tty it was started from

dash — Sat, 18 May 2013 21:41:16 +0000

$ startx &! exit

by David Winterbottom (codeinthehole.com)

Create a secure password using /dev/urandom and sha256

techie — Thu, 16 May 2013 10:50:00 +0000

$ pwgen -Bs 10 1

by David Winterbottom (codeinthehole.com)

Retry the previous command until it exits successfully

unixmonkey21806 — Tue, 14 May 2013 18:08:54 +0000

$ until !!; do :; done

by David Winterbottom (codeinthehole.com)

Inspect content of a tar file with vim

redy — Tue, 14 May 2013 08:20:16 +0000

$ vim anything.tar

by David Winterbottom (codeinthehole.com)

Use Vim to convert text to HTML.

RanyAlbeg — Sun, 12 May 2013 19:30:51 +0000

$ vimhtml() { [[ -f "$1" ]] || return 1; vim +'syn on | run! syntax/2html.vim | wq | q' "$1";}

``vimhtml somefile.txt`` will open vim for the HTML convertion and close it immediately after its done, leaving you with somefile.html which you can later use in your website or whatever.

by David Winterbottom (codeinthehole.com)

Amplify movie playback

hendry (http://hendry.iki.fi) — Sat, 11 May 2013 20:47:50 +0000

$ mplayer -af volume=10.1:0 $movie

If a movie is too hard to hear, try the above command to make it louder.

by David Winterbottom (codeinthehole.com)

convert a string from lower case into uppercase

eastwind — Sat, 11 May 2013 11:08:37 +0000

$ echo lowercaseword | tr '[a-z]' '[A-Z]'

by David Winterbottom (codeinthehole.com)

Put files back together after encrypted with tar and ccrypt

symgryph — Fri, 10 May 2013 12:44:12 +0000

$ cat file.gz.cpt *[a-z] | ccdecrypt -k yoursecretpassword | tar -xzf -

by David Winterbottom (codeinthehole.com)

encrypt, split and get ready for dvd a large file via tar and ccrypt

symgryph — Fri, 10 May 2013 12:42:47 +0000

$ tar czf - /directory/to/tar | ccrypt -k yourpassword | split -b50m - /final/encrypted.cpt

by David Winterbottom (codeinthehole.com)

The awesome ping / traceroute combination

techie — Fri, 10 May 2013 09:48:23 +0000

$ mtr <URL>

In the sample output I used google.com.

by David Winterbottom (codeinthehole.com)

Create a git repository

batandwa (http://batandwa.me) — Thu, 09 May 2013 21:44:24 +0000

$ git-createrepo() { repos_path='/srv/git/'; mkdir $repos_path$1; cd $repos_path$1;   git init --bare;   echo "Repository location: ssh://$USER@`cat /etc/HOSTNAME``pwd`"; cd -; }

Creates a git repository in a predefined location.

by David Winterbottom (codeinthehole.com)

Debug how files are being accessed by a process

hendry (http://hendry.iki.fi) — Thu, 09 May 2013 16:14:25 +0000

$ inotifywait -m -r .

Instead of looking through `lsof` results, use inotifywait!

by David Winterbottom (codeinthehole.com)

Poll and print end of lates modified file

batandwa (http://batandwa.me) — Thu, 09 May 2013 11:37:59 +0000

$ watch 'ls -tr1 | tail -n1 | xargs tail'

Watches for file modifications in the current directory and tails the file.

by David Winterbottom (codeinthehole.com)

Print file content in reverse order

andreasS (http://www.fam.tuwien.ac.at/~schamane/) — Thu, 09 May 2013 09:19:51 +0000

$ tac [FILE]

by David Winterbottom (codeinthehole.com)

Copy all images to external hard-drive

techie — Thu, 09 May 2013 08:33:01 +0000

$ ls *.jpg | xargs -n1 -i cp {} /external-hard-drive/directory

by David Winterbottom (codeinthehole.com)

Open a file using vim in read only (like less)

techie — Thu, 09 May 2013 08:28:32 +0000

$ vim -R /etc/passwd

by David Winterbottom (codeinthehole.com)

Go to a specified line in a file

techie — Thu, 09 May 2013 08:24:28 +0000

$ vim +143 filename.txt

by David Winterbottom (codeinthehole.com)

Remove duplicate lines using awk

techie — Thu, 09 May 2013 08:23:30 +0000

$ awk '!($0 in array) { array[$0]; print }' temp

by David Winterbottom (codeinthehole.com)

Print file content in reverse order

techie — Thu, 09 May 2013 08:22:36 +0000

$ sed -n '1!G;h;$p' techie.txt

by David Winterbottom (codeinthehole.com)

Execute commands on files found by the find command

techie — Thu, 09 May 2013 08:21:18 +0000

$ find -iname "MyCProgram.c" -exec md5sum {} \;

by David Winterbottom (codeinthehole.com)

Print the matched line, along with the 3 lines after it.

techie — Thu, 09 May 2013 08:20:31 +0000

$ grep -A 3 -i "example" demo_text

by David Winterbottom (codeinthehole.com)