How to upgrade to Ubuntu 10.10 Maverick Meerkat from ubuntu 10.04 lucid, karmic| Desktop & Server

- 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.