[SOLVED] LL2.2 Running from a USB stick only?

[rokytnji]

Ubuntu LTS (Long Term Support) Releases

Each Ubuntu LTS (Long Term Support) release will initially be based on the Debian Testing branch. These releases take Ubuntu's approach of making Linux accessible to inexperienced users, and constitute a release that is going to be kept stable for five years (before 12.04 three years) into the future, receiving security updates and some occasional bug fixes during that time, but remaining otherwise unchanged.

Essentially, an Ubuntu LTS release is made in the same way as a non-LTS release, except that it will be kept stable and supported for a lot longer, including by Canonical's own paid support services. In addition, it was decided that Ubuntu LTS releases should initially be based on Debian Testing rather than the similarly unstable but sometimes buggier Debian Unstable.

It is intended that every fourth Ubuntu release shall become an LTS release, thus Ubuntu LTS releases are made every two years. The most current Ubuntu LTS release is Ubuntu 14.04.

from

http://www.wikivs.com/wiki/Debian_vs_Ubuntu