Query about problem with updating software

[Colin Watson]

On Thu, Aug 04, 2022 at 02:26:42AM +0800, Bret Busby wrote:
> On 4/8/22 2:19 am, Sarunas Burdulis wrote:
> > On 8/3/22 13:45, Bret Busby wrote:
> > > I am running UbuntuMATE 20.10 on this computer.
> > 
> > 20.10 is no longer supported.
> > 
> > https://fridge.ubuntu.com/2021/07/25/ubuntu-20-10-groovy-gorilla-end-of-life-reached-on-july-22-2021/
> 
> I am fully aware of that.
> 
> That does not answer, or, relate to the question, which, you conspicuously
> omitted from your post, with the question being the purpose of this thread.

It is actually directly relevant though!  The reason your command
doesn't work is that "sudo apt -y update" exits non-zero because of the
various sources.list entries that return "404 Not Found", and as a
result the other commands that you chained after it with "&&" never run.
The reason that those entries return 404 is precisely because groovy is
EOL and has thus been moved to old-releases.ubuntu.com.

https://help.ubuntu.com/community/EOLUpgrades#Update_sources.list will
likely be helpful here.

(I presume that Software Updater flags the no-longer-present
repositories as errors but is willing to go ahead and upgrade other
things anyway, much as if you'd followed "sudo apt -y update" with ";"
rather than "&&".  But you should fix the sources.list lines anyway.)

-- 
Colin Watson (he/him)                              [cjwatson at ubuntu.com]