Ubuntu upgrade stuck

Hello,

As far as I can see here, at the time I'm writing this, the "lunar" release does not exist for the repository http://archive.canonical.com/. The APT configuration is therefore inconsistent and it's not surprising that your package manager is confused.

To fix the issue, remove from the /etc/apt/sources.list file (or one of the files in /etc/apt/sources.list.d) the corresponding line, or comment it out by adding a # at the beginning of the line:

sudo gedit /etc/apt/sources.list &

If you're unsure about the concerned line, please let us know its content.

Once that's done, save, exit, and then run:

sudo apt update sudo apt upgrade

Good luck

Hey

Public versions:

On ccm you can find this ubuntu 64 bits 20.04 LTS download

https://www.commentcamarche.net/telecharger/systemes-d-exploitation/25121-ubuntu/

A filename that might look like this is lunar lobster but not from canonical the file and it's not an LTS

https://cloud-images.ubuntu.com/releases/23.04/release-20231205/

I think the last LTS is from 2022

https://doc.ubuntu-fr.org/lts

A help page

https://lecrabeinfo.net/mettre-a-jour-ubuntu-20-04-lts-vers-22-04-lts.html

A more general explanation of the versions

https://www.malekal.com/ubuntu-les-cycles-de-versions-et-de-mise-a-jour-versions-lts-ems/

And the support from Canonical, it can be paid for companies more generally, there I don't know but generally those who use this are already aware of updates, they don't search everywhere for files.