How to install Ubuntu on your Nexus 4, Nexus 7 or Nexus 10

This is a step by step process showing you how to install Ubuntu on your Nexus device (Nexus 4, Nexus 7, Nexus 10) and on other mobile phones/tablets (community-driven ports). Before you start to do so we recommend you the following documentations (please carefully read the warning and disclaimer within the installation instructions).