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Pretty simply I have impish and want to upgrade. I ran do-release-upgrade but it requires apt-get upgrade first which now fails due to the URLs being gone (Please install all available updates for your release before upgrading.):

Err:3 http://archive.ubuntu.com/ubuntu impish-updates/main amd64 ubuntu-advantage-tools amd64 27.9~21.10.1
  404  Not Found [IP: 185.125.190.39 80]
Err:4 http://archive.ubuntu.com/ubuntu impish-updates/main amd64 ubuntu-release-upgrader-core all 1:21.10.10
  404  Not Found [IP: 185.125.190.39 80]
Err:5 http://archive.ubuntu.com/ubuntu impish-updates/main amd64 python3-distupgrade all 1:21.10.10
  404  Not Found [IP: 185.125.190.39 80]

So how do I update so I can upgrade? Thanks.

automaton
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1 Answers1

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Well to anyone else who encounters this I had to edit sources.list and manually change impish to jammy.

After that do-release-upgrade worked fine.

It's unfortunate this has to be done in 2022 still.

automaton
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    That doesn't need to be done, Ubuntu 21.10 is EOL meaning the repositories move, which is documented to occur after the EOL has been reached, hence the https://help.ubuntu.com/community/EOLUpgrades which outlines the extra step required. If you don't want to perform the extra documented step, you can release-upgrade before EOL is reached. – guiverc Jul 26 '22 at 06:29
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    Also note; even if you missed the warnings posted ~six weeks before the EOL (eg. https://fridge.ubuntu.com/2022/06/01/ubuntu-21-10-impish-indri-reaches-end-of-life-on-july-14-2022/) the release Ubuntu 21.10 tells you it's the 2021-October release, so adding 9 months onto that allows you to know when it reaches EOL (the release date & announcements give you the day of the month if you need day, but month alone is a pretty good planning queue) – guiverc Jul 26 '22 at 06:32
  • Thanks man this was the first modification to sources.list that I found that actually works!..

    @guiverc I strongly disagree with your line of thought... People set and forget Linux all the time for me (and many other seeing the thread) the first hint that there was anything wrong is the move of the apt repositories which happens after EOL...

     – Daan Luttik Aug 12 '22 at 14:43
  • For those that want a 'quick and easy' way to update their apt sources with the EOL repositories: sudo sed -i -e 's/gb.archive.ubuntu.com/old-releases.ubuntu.com/g' /etc/apt/sources.list :-)

    (Check exactly which mirror you're using)

     – CrabLab Aug 19 '22 at 22:01