Upgrade paths from UbuntuMATE 16.04.x and 18.04.x to 19.10

[Paul Smith]

On Sun, 2019-10-13 at 00:31 +0800, Bret Busby wrote:
> I am assuming (but am not sure) that I can upgrade directly from
> 18.04.x. to 19.10.

I don't think that is correct.  Technically the supported release path
from 18.04 to 19.10 requires you to go 18.04 -> 18.10 -> 19.04 ->
19.10.

You can upgrade from one LTS release directly to the next LTS release
(e.g., 16.04 -> 18.04 is supported, and 18.04 -> 20.04 will be
supported next spring).  But for non-LTS releases the supported upgrade
path is to go through each one.

I guess ultimately if you start the upgrade tool with the -d option to
allow development releases, then you can upgrade to any release offered
to you there.  I suspect that if you run that on 18.04 it won't offer
you 19.04 or (when released) 19.10.

> I assume that, once upgraded to 19.10, I will, when it becomes
> released, be able to upgrade thence to 20.04, and, return to the LTS
> upgrade cycle.

Yes, when 20.04 LTS is released it will be supported to upgrade
directly to it from both 19.10 and from 18.04 LTS.