I have an old computer running Lubuntu, and I want to give it away. Before that, I want to make sure none of my data can be recovered from the hard drive.
I tried doing this using shred
and dd
from a Lubuntu live USB, but keep getting the message:
failed to open for writing: Permission denied
The drive is encrypted. Could that be the problem?
If so, how can I securely erase it? I've heard that without the password it's unreadable anyway, but it seems that someone could use a brute force approach to decrypt it, so that doesn't seem very secure.