Upgrade from 16.04.x to 18.04.3 broke system - was Upgrade paths from UbuntuMATE 16.04.x and 18.04.x to 19.10

[Ralf Mardorf]

On Thu, 17 Oct 2019 16:25:11 +0200, Ralf Mardorf wrote:
>On Thu, 17 Oct 2019 09:54:42 -0400, Little Girl wrote:
>>Well, there's no going back.  
>
>[satire] There are rumours that recovery is possible, unless the HDD
>wasn't 38 times overwritten at full moon and/or in Stonehenge or inside
>of the Great Pyramid of Giza, with the chars of the lyrics of the
>Sailor Moon song. You only need to use your magnetic force microscope
>and a little bit of time to take a look at the magnetic particles that
>represent a single bit of the few bits a several hundred GiB HDD
>contains. [/satire]

FWIW after reformatting a HDD data rescue by software is really still
possible, but it only could restore some dirs and files and won't
restore the original structure, to allow just changing the ownership,
so in this case there's really no going back.