A week ago I decided to proceed with the upgrade from Ubuntu 14.04 LTS to 16.04 LTS. I always dread having to do these upgrades because it always means trouble, and this one was no exception.
As instructed by the release notes
https://wiki.ubuntu.com/XenialXerus/ReleaseNotes
I started from the Update Manager, which offers the LTS upgrade once it has been made available three or four months after the initial release in April. I have made it a practice...