Hide

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again.

Delete that bloated snippets file you've been using and share your personal repository with the world. 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.


If you have a new feature suggestion or find a bug, please get in touch via http://commandlinefu.uservoice.com/

Get involved!

You can sign-in using OpenID credentials, or register a traditional username and password.

First-time OpenID users will be automatically assigned a username which can be changed after signing in.

Universal configuration monitoring and system of record for IT.
Hide

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:

Hide

News

May 19, 2015 - A Look At The New Commandlinefu
I've put together a short writeup on what kind of newness you can expect from the next iteration of clfu. Check it out here.
March 2, 2015 - New Management
I'm Jon, I'll be maintaining and improving clfu. Thanks to David for building such a great resource!
Hide

Top Tags

Hide

Functions

Hide

Credits

Commands by sata from sorted by
Terminal - Commands by sata - 8 results
sudo arp-scan -I eth0 192.168.1.0/24
echo -n 'text' | xxd -ps | sed -e ':a' -e 's/\([0-9]\{2\}\|^\)\([0-9]\{2\}\)/\1\\x\2/;ta'
2010-06-09 12:20:02
User: sata
Functions: echo sed
Tags: hex ascii
1

Converts the ascii text to hex from bash.

Check the sample output.

rm-but() { ls -Q | grep -v "$1" | xargs rm -r ; }
2010-05-13 09:28:56
User: sata
Functions: grep ls rm xargs
0
rm-but() { ls -Q | grep -v "$1" | xargs rm -r ; }

Add this to your .bashrc file.

Then whenever you need to remove all files/directories but one from present working directory. Run:

rm-but <important-file-or-directory>

Notes:

1. This doesn't affect the hidden files.

2. Argument is actually as string. And all files/directories having this string in there name are left untouched.

awk 'BEGIN{IGNORECASE=1;FS="<title>|</title>";RS=EOF} {print $2}' file.html
2010-04-20 10:54:03
User: sata
Functions: awk
Tags: Linux awk html
4

Case Insensitive! and Works even if the "<title>...</title>" spans over multiple line.

Simple! :-)

find ~/.mozilla/firefox/*/Cache -exec file {} \; | awk -F ': ' 'tolower($2)~/mpeg/{print $1}'
2010-04-19 06:59:55
User: sata
Functions: awk file find
2

Grab a list of MP3s (with full path) out of Firefox's cache

Ever gone to a site that has an MP3 embedded into a pesky flash player, but no download link? Well, this one-liner will yank the *full path* of those tunes straight out of FF's cache in a clean list.

Shorter and Intuitive version of the command submitted by (TuxOtaku)

sed -i 's/^M//' file
2010-03-25 19:34:08
User: sata
Functions: sed
4

Here "^M" is NOT "SHIFT+6" and "M". Type CTRL+V+M to get it instead.

Its shortest and easy. And its sed!, which is available by default in all linux flavours.. no need to install extra tools like fromdos.

printf "%.50d" 0 | tr 0 -
cat /dev/cdrom > ~/mydisk.iso
2009-03-26 05:54:41
User: sata
Functions: cat
Tags: Linux
-10

Generate the iso from the disk, easily.

same as "dd if=/dev/cdrom of=~/mydisk.iso"