I want to upgrade from 14LTS to 16LTS.
I just tried it now on my 14LTS and received:
# do-release-upgrade
Checking for a new Ubuntu release
No new release found
I’m not quite sure where to possibly start. High-level:
(1)SERVER1 -> (2)HOST1 (uses approx. for a local cache) -> VPN-> (3)REMOTE_UPSTREAM_REPO -> (4)Ubuntu servers
I control/manage (1) and (2), but don’t have access to (3).
Where might the issue be? Probably at (3)? What might I need from them?
I know I’m running 14LTS with the Xenial kernel, but perhaps that doesn’t mean they have all the Xenial repos at (3)?