Query about problem with updating software

[Bret Busby]

Hello.

I am running UbuntuMATE 20.10 on this computer.

In running the combined update.upgrade command, as shown below, whilst I 
understand that no updates/upgrades are available for  the 20.10 OS 
itself, provision is made for updating additional, non-Ubuntu repository 
software, as shown below, but, the combined command will not update the 
software; I have to use the GUI Software Updater application, instead, 
to update the software packages that can be updated; for example, at 
present, the Software Updater shows that an update is available for Pale 
Moon, but, the combined update/upgrade command below, will not do it, 
but,. I am confident that the Software Updater will do it, if I select 
the "Update now" option.

Below, is the combined update/upgrade command, with the response.

"
Thu Aug 04 01:28:12 bret at bret-MD34045-2521:~$sudo apt -y update && sudo 
apt -y full-upgrade && sudo -H pip install --upgrade youtube-dl && sudo 
apt -y autoremove && sudo apt -y autoclean
[sudo] password for bret:
Hit:1 https://repo.skype.com/deb stable InRelease 
 

Get:2 http://ppa.launchpad.net/yannubuntu/boot-repair/ubuntu groovy 
InRelease [17.5 kB] 

Hit:3 http://archive.canonical.com/ubuntu groovy InRelease 
 

Ign:4 http://security.ubuntu.com/ubuntu groovy-security InRelease 
 

Ign:5 http://archive.ubuntu.com/ubuntu groovy InRelease 

Err:6 http://security.ubuntu.com/ubuntu groovy-security Release 

   404  Not Found [IP: 185.125.190.36 80]
Ign:7 http://archive.ubuntu.com/ubuntu groovy-updates InRelease 

Get:8 
http://download.opensuse.org/repositories/home:/stevenpusser/xUbuntu_20.04 
  InRelease [1,560 B]
Ign:9 http://archive.ubuntu.com/ubuntu groovy-backports InRelease 

Err:11 http://archive.ubuntu.com/ubuntu groovy Release 

   404  Not Found [IP: 185.125.190.39 80]
Ign:12 https://repo.vivaldi.com/stable/deb stable InRelease
Hit:13 https://repo.vivaldi.com/stable/deb stable Release
Err:15 http://archive.ubuntu.com/ubuntu groovy-updates Release
   404  Not Found [IP: 185.125.190.39 80]
Err:16 http://archive.ubuntu.com/ubuntu groovy-backports Release
   404  Not Found [IP: 185.125.190.39 80]
Hit:10 
http://ixpeering.dl.sourceforge.net/project/ubuntuzilla/mozilla/apt all 
InRelease
Reading package lists... Done
E: The repository 'http://security.ubuntu.com/ubuntu groovy-security 
Release' no longer has a Release file.
N: Updating from such a repository can't be done securely, and is 
therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user 
configuration details.
E: The repository 'http://archive.ubuntu.com/ubuntu groovy Release' no 
longer has a Release file.
N: Updating from such a repository can't be done securely, and is 
therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user 
configuration details.
E: The repository 'http://archive.ubuntu.com/ubuntu groovy-updates 
Release' no longer has a Release file.
N: Updating from such a repository can't be done securely, and is 
therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user 
configuration details.
E: The repository 'http://archive.ubuntu.com/ubuntu groovy-backports 
Release' no longer has a Release file.
N: Updating from such a repository can't be done securely, and is 
therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user 
configuration details.
Thu Aug 04 01:28:43 bret at bret-MD34045-2521:~$
"

The repository that includes the name "stevenpusser" in the path, is the 
repository for Pale Moon.  The ubuntuzilla repository is for SeaMonkey, 
and (of course) the vivaldi repository is for Vivaldi.

Now, the combined update/upgrade command, will not update these three 
web browsers, but, the Software Updater will update them, as updates 
become available.

The question is, why will the update/upgrade command, as it is, not 
update those three packages, when the Software Updater GUI application, 
will update them, when engaged to do it?

Thank you in anticipation.

-- 
Bret Busby
Armadale
West Australia
(UTC+0800)
..............