- Desktop Upgrade:
So to upgrade from Ubuntu 10.10 or older on a desktop system, press Alt+F2 and type in update-manager -d into the command box. Update Manager should open up and tell you: New distribution release '10.04' is available ( See screenshot bellow).
Before to upgrade remember that is important to update your system first then click Upgrade and follow the on-screen instructions:
1- Press Alt+F2 and type in update-manager -d
2- Now follow these steps :
First check for updates, then Install them, and finally click Upgrade and follow the on-screen instructions.
- Server Upgrade:
To upgrade from Ubuntu 10.04 LTS on a server system:
1- install the update-manager-core package if it is not already installed:
sudo apt-get install update-manager-core
2- Edit /etc/update-manager/release-upgrades and set Prompt=normal;
3- Launch the upgrade tool with the command
sudo do-release-upgrade -d
and follow the on-screen instructions.