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A few weeks ago I installed a pre-release (daily), pre beta version of Kubuntu Lunar Lobster (23.04) in the belief I would be able to update it to the full release when it was released. Everything runs well, but I note that there are very few updates, and those mainly to themes and apps, not to the underlying O.S. How do I upgrade to the full release version? - I have noted and tried "sudo do-release-upgrade -d and sudo do-release-upgrade" and similar suggested on this website - however I get "no new release found" and nothing happens. Must I do a whole new install from a fresh download of the iso, or is there some command-line fu that will do the trick? (I'm trying to avoid the full re-install as my machine is a dual boot set-up and the safest way to avoid messing the boot partition is to remove the drive the other O.S. is on - its a NVme drive buried under heat sinks on the motherboard, a major hassle. If anyone can shed some light on this I would really appreciate it!

canonballrun
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  • Please run the command line `cat /etc/apt/sources.list /etc/apt/sources.list.d/* |grep -v '^#'` and then edit your original question to add the command and its output. Indent each line 4 spaces to render it as `code`. This will tell us what repositories you may have to remove (or add). – sudodus May 10 '23 at 09:43
  • What happens if you run `sudo apt update && sudo apt upgrade` (please include output in your question)? I think maybe you're already upgraded to the full version. Is there any specific package you think is not upgraded to the latest version? If yes, please provide info on this. – Artur Meinild May 10 '23 at 10:12
  • You only need to apply all upgrades and you'll find you're running the released *lunar* or 23.04 system. Do note you'll need to run `sudo apt update` to update software lists (ensure all lines of output are present) then apply all upgrades with `sudo apt full-upgrade` (note: `apt upgrade` may not be sufficient as per `man apt`). I'm using what was a *lunar alpha* system, and it upgraded normally.. Post-release I've moved to *mantic* which is when you use the `do-release-upgrade -d` (not to move yourself from *lunar* to 23.04. – guiverc May 10 '23 at 10:41
  • Do note there are cases even on release products that `apt upgrade` isn't sufficient though they are rare... You need to use `apt full-upgrade` far more often especially during the *alpha* stage of a release; but it's also required during *beta* more often than it will when the product is released. Were you applying all upgrades using `apt full-upgrade` ? (or `apt-get dist-upgrade`). FYI: You can re-install a Ubuntu Desktop system non-destructively very easily; especially the *flavors* like Kubuntu – guiverc May 10 '23 at 10:46

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