If you search for “Ubuntu Full Disk Encryption” the first DuckDuckGo hit, titled “Community Ubuntu Documentation”, says: “This article is incomplete, and needs to be expanded”, “Please refer to EncryptedFilesystems for further documentation”, and “WARNING! We use the cryptoloop module in this howto. This module has well-known weaknesses.” Hardly inspiring. The rest of the docs are a maze of outdated and locked-down wiki pages that I can’t fix.
What all of them fail to state is that, as of 12.10, it’s now a simple checkbox in the installer. So I hope this blog post will get some search engine juice so that more people don’t spend hours working out how to do it.