Possible Duplicate:
I installed an alpha or beta, am I up to date with the final release if I keep upgrading?
How to upgrade from beta 2 release of 12.04 to stable release of 12.04? Do I need to create a new installing disk for upgrading, or can I update it via APT? (And yes, I know that upgrading via APT is not recommended) Update manager didn't say anything about upgrading to 12.04, so I tried sudo apt-get dist-upgrade, but it didn't work either.
