What are you, people? On dope?

Man the Canonical guys make life upgrading your server easy! Check it out here

1. Install update-manager-core 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:
   

   sudo do-release-upgrade

5 minutes later and the server is upgraded. Sweet!