This is just a short and sweet guide to showcase how easy it can be (bugs aside) to upgrade from Ubuntu 14.04.4 LTS to 16.04.1 LTS.
There is a simple command built into Ubuntu to upgrade to the next major release version easily. This command for the upgrade tool is:
This will start the upgrade tool. It will check to see if a new release upgrade version is available and then prompt you to upgrade.
16.04.1 just released this week and now this upgrade path is finally available for Ubuntu 14.04 LTS users.