Ubuntu upgrade

install the update-manager-core package if it is not already installed:

sudo apt-get install update-manager-core

Edit /etc/update-manager/release-upgrades and set Prompt=normal;

Launch the upgrade tool with the command

sudo do-release-upgrade -d

and follow the on-screen instructions.

Links

• How to upgrade from Ubuntu 10.04, 10.10, 11.04 to Ubuntu 11.10