Upgrade Ubuntu 12.10 to 13.04 easy way

If you want to upgrade, not install a fresh system off of a DVD or USB device, you can use this method suggested on the #ubuntu+1 IRC channel:

• sudo sed -i 's/quantal/raring/' /etc/apt/sources.list
• sudo apt-get update
• sudo apt-get dist-upgrade

The easiest way to update from 12.10 to 13.04, just open the terminal and type this:

• sudo do-release-upgrade -d

Ubuntu 13.04 is in beta for now. Hence it is still recommended to go through your own risk.