The theory of upgrading from 14.04 to 15.04 using /etc/apt/sources.list

[silver.bullet at zoho.com]

On Mon, 10 Aug 2015 10:14:36 -0500, William Scott Lockwood III wrote:
>On Mon, Aug 10, 2015 at 10:11 AM, Colin Law <clanlaw at gmail.com> wrote:
>> On 10 August 2015 at 16:05, Simon Quigley <sqawesome99 at gmail.com>
>> wrote:
>>> C,
>>>
>>> So should I try it in a VM?
>>
>> Even if it appears to work in a VM that is no guarantee that it will
>> work on another machine with different packages installed.
>>
>> Why not just use a live image to do the upgrade from, or do it the
>> normal way in two steps.
>
>
>Sorry, but that's just fear mongering. Do I really need to explain how
>to duplicate the package list and sources.list on a test machine so
>that it matches your production environment?

Restoring a backup from the "real" install in the VM IMO is the better
way to go, since reinstalling from a package list might not include
tweaked settings.