As a system administrator, you probably already know how important it is to encrypt your disks.If your laptop were to be stolen, even a novice hacker would be able to extract the information contained on the disks.All it takes is a simple USB stick with a LiveCD on it and everything would be stolen.Luckily for you, there are ways for you to prevent this from happening : by encrypting data stored on your disks.

Source: LXer – How To Encrypt Root Filesystem on Linux