Kubuntu 18.04.2 LTS -> Ubuntu 19.04

[Paul Smith]

On Fri, 2019-06-14 at 22:26 +0200, Volker Wysk wrote:
> This means that I have to migrate from my 18.04.2 LTS system to the
> newest Ubuntu version.
> 
> Can this be done with do-release-upgrade or something like that? I
> really don't want to set up everything from scratch _again_. There's
> a lot to setup.

It is definitely supported to use do-release-upgrade to move between
non-LTS releases; I do it all the time (I don't use fresh install
modes).

However, unfortunately you can't skip non-LTS releases; that's not
supported.  So you can't jump straight from 18.04 to 19.04; you have to
go to 18.10 first then from there to 19.04.

Also, I don't know enough about Kubuntu to say if you can upgrade from
a Kubuntu release to a vanilla Ubuntu release... that's something I've
never really considered trying.

It should be _possible_ because all the packages will have appropriate
names... however of course at best you'll have a lot of leftover
Kubuntu packages lying around on your Ubuntu system.

Given all the above it _might_ make sense to do a fresh install of
Ubuntu 19.04 for this first step, then proceed to use do-release-
upgrade for future upgrades to newer releases.  But, it depends on how
painful that will be for you to re-set up versus cleaning out stuff
after an upgrade.