Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I've set up a Ubuntu system as a server, with the entire drive encrypted. It needs the password at bootup, after the BIOS hands over to GRUB (at least I think that's when).

I've since set up Wake-on-LAN, which starts the computer, which only gets as far as the drive-encryption password prompt. It doesn't get far enough to ask about login details, or to be able to ssh in.

Is there a way to enter the password remotely? If not, is there a way to boot into an unencrypted partition, and then decrypt the rest of the drive? If I need to repartition, is there a way to do it while keeping the settings etc?

share|improve this question
up vote 0 down vote accepted

You need a remote (network) console to do this, and I'd be reluctant to use one that I didn't trust & own (if I were you). On the other hand, it solves your other problems too.

share|improve this answer
Sorry, what? Do you mean ssh? Or something more like VNC? Either way I would need to be able to login, but the entire disk (including the usernames/passwords in /etc/passwd) is encrypted. I need a way to decrypt the file-system remotely. – Gyppo Jul 18 '10 at 23:18
I mean this: – Slartibartfast Jul 20 '10 at 3:58
That's actually pretty cool, thanks. – Gyppo Aug 9 '10 at 18:03

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.