FYI, not to be lame, but 10.10 is a non-LTS version of Ubuntu and thus has a shorter lifecycle than the LTS version does (which also has better support)..... so why not put 12.04LTS on it in 7 days when it comes out on the 26th of April? 10.10 is EOL (End-of-Life).(End-of-Life), but aside from that, you could do the following: sudo dpkg-reconfigure update-manager && sudo apt-get update && sudo apt-get upgrade.

FYI, not to be lame, but 10.10 is a non-LTS version of Ubuntu and thus has a shorter lifecycle than the LTS version does (which also has better support)..... so why not put 12.04LTS on it in 7 days when it comes out on the 26th of April? 10.10 is EOL (End-of-Life).