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Is there a way to do full disk encryption after the install?

I have a ubuntu distribution (12.10) in my laptop, but i didn't encrypt my hard disk in the installation phase. It's possible that i could encrypt my hard disk without install everything again? And without loosing my files and programs already installed e configured? Thanks in advance.

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marked as duplicate by qbi, hhlp, fabricator4, fossfreedom Dec 18 '12 at 13:05

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2 Answers

You could install truecrypt which allows you to perform full disk encryption with a password pre boot.

http://www.truecrypt.org/downloads

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Thanks Tim.But truecrypt can encrypt everything in my hard disk without move or copy any of my files to other location and then copy back into my home folder? –  João Dec 18 '12 at 10:38
    
It will encrypt the hard disk without moving or copying anything. We deploy it to our laptops after everything else has been installed/setup on them. If you want to encrypt the entire disk then this is certainly one of the easiest ways I have found –  Tim Alexander Dec 18 '12 at 10:59
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The answer is probably no; full disk encryption (at least, using the native ecryptfs method) requires completely wiping the Ubuntu partition and reinstalling it inside an encrypted container, it is not possible to do this incrementally.

However, encrypting the whole disk tends to be unnecessary, since there is little security implication in having the standard parts of an Ubuntu system stored unencrypted. You may want to look at either encrypting your home directory (which should be possible without reinstalling, even if not easy), or just creating a single encrypted folder for sensitive files.

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ecryptfs is not used for full disk encryption, it's dm-crypt. –  gertvdijk Dec 18 '12 at 12:18
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