How to Upgrade Ubuntu 14.10 to Ubuntu 15.04

The official support for Ubuntu 14.10 will end sometime around July 2015, but the Ubuntu 15.04 release will be supported by Canonical with security patches and software updates until January 2016. Therefore, we think that it is best for you to upgrade your Ubuntu 14.10 machine(s) to Ubuntu 15.04 as soon as possible, in order to avoid any complications.