Full Disk Encryption For Ubuntu And Fedora

"The purpose of full disk encryption (FDE) is to lock down the everyday-files including documents, pictures, stored communications (email), memory and application caches, and so on. When a system is properly encrypted a passphrase is required (preboot authentication) before any booting may occur and, without that passphrase, the files cannot be read. TrueCrypt can create a fully encrypted Windows installation and the most recent version of Apple OSX (10.7) comes packaged with it’s own FDE. There are a few security vulnerabilities to be aware of, but in this writer’s opinion every computer system should use FDE as standard practice."