We probably want to recommend the new LTS version of Ubuntu over the previous 14.04 at some point.
The documentation needs to be updated for this.
(In reply to comment #1)
> The documentation needs to be updated for this.
tl-setup also needs to be updated to match the documentation.
Verified documentation and tl-setup update of Ubuntu "recommended" version.
All prerequisites are fixed and verified. Closing this bug.