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.

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.

UpGuard checks and validates configurations for every major OS, network device, and cloud provider.

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:



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!

Top Tags



Generate MD5 of string and output only the hash checksum

Terminal - Generate MD5 of string and output only the hash checksum
echo -n "String to MD5" | md5sum | cut -f1 -d' '
2011-03-05 03:53:09
User: xakon
Functions: cut echo md5sum
Generate MD5 of string and output only the hash checksum

Nothing special about hashing here, only the use of cut, I think, could result at fewer keystrokes.


There are 2 alternatives - vote for the best!

Terminal - Alternatives
echo -n "String to MD5" | md5sum | cut -b-32
echo -n "String to get MD5" | md5sum | sed "s/ -//"
echo -n "String to MD5" | md5sum | awk '{print $1}'

Know a better way?

If you can do better, submit your command here.

What others think

Great work here, I just managed to also adapt it fro sha1 with only one of the above commands the one at the very top. I simply replaced the md5sum with sha1sum. I did not try the bottom two. The second cut it short by 8 digits.

Also Google chrome is an excellent source (and I presume secure) through a plugin (they call it extension) and the name is hashr

Thank you all


Comment by costas10 371 weeks and 2 days ago

Your point of view

You must be signed in to comment.