Hello all, I have a netbook running Ubuntu Natty. I installed it using the Alternative CD and chose to encrypt both the root and the home partitions. I plan to upgrade to the next release (12.04), but I am not sure how to approach this so I do not get locked out of my data. I also thought I'd like to change the encryption method from a passphrase to a key file. I got the idea watching a tutorial for using an external USB device as a boot partition when installing Backtrack 5 on Revision3's Hak5. Can anyone point me to a step by step guide for doing this? Thanks! Amichai.