Upgrade ubuntu 14.04 LTS to Ubuntu 14.10 Desktop/Server
This tutorial explain how to upgrade your ubuntu 14.04 LTS Desktop/Server to Ubuntu 14.10
Ubuntu 14.04 LTS Desktop Upgrade
Press Alt+F2 and type in "update-manager" (without the quotes) into the command box.
Update Manager should open up and tell you: New distribution release ‘14.10' is available.Click Upgrade and follow the on-screen instructions.
Ubuntu 14.04 LTS Server Upgrade
Install the update-manager-core package if it is not already installed.
Launch the upgrade tool with the command sudo do-release-upgrade.
Follow the on-screen instructions.
Note:-The server upgrade will use GNU screen and automatically re-attach in case of dropped connection problems.