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.

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:



2011-03-12 - Confoo 2011 presentation
Slides are available from the commandlinefu presentation at Confoo 2011: http://presentations.codeinthehole.com/confoo2011/
2011-01-04 - Moderation now required for new commands
To try and put and end to the spamming, new commands require moderation before they will appear on the site.
2010-12-27 - Apologies for not banning the trolls sooner
Have been away from the interwebs over Christmas. Will be more vigilant henceforth.
2010-09-24 - OAuth and pagination problems fixed
Apologies for the delay in getting Twitter's OAuth supported. Annoying pagination gremlin also fixed.

Top Tags



Make an iso file out of your entire hard drive

Terminal - Make an iso file out of your entire hard drive
cat /dev/hda > ~/hda.iso
2009-11-09 15:44:53
User: mvrilo
Functions: cat
Make an iso file out of your entire hard drive


There are 7 alternatives - vote for the best!

Terminal - Alternatives
dd if=/dev/hda of=file.img

Know a better way?

If you can do better, submit your command here.

What others think

This is not an ISO file, because it is not in the format used on optical discs. Instead just call it "image".

Comment by hfs 284 weeks ago

Just to clarify, is this "image" the same as in disk mirroring?

Comment by getkaizer 284 weeks ago

It's really an image, you can mount it and use it. Test it by copying a pendrive or a small partition.

Comment by mvrilo 283 weeks and 6 days ago

So, in the hands of a not-so knowing person, it's:

- most probably going to create a nice file system full (on hda)

- not going to create an iso image anyway.

Come again, why is that a good idea ?

Comment by pruneau 283 weeks and 6 days ago

Your point of view

You must be signed in to comment.