How do I 'do-release-upgrade' now 21.10 is (just) out of support?

[Aaron Rainbolt]

On Tue, Jul 26, 2022 at 10:09 AM Chris Green <cl at isbd.net> wrote:
>
> On Tue, Jul 26, 2022 at 01:38:59PM +0100, Ian Bruntlett wrote:
> >    Hi Chris,
> >    On Tue, 26 Jul 2022 at 13:19, Chris Green <[1]cl at isbd.net> wrote:
> >
> >      I'm sure I've not hit this problem before but when I try
> >      'do-release-upgrade' on my [x]ubuntu 21.10 system it says:-
> >          root at t470# do-release-upgrade
> >          Checking for a new Ubuntu release
> >          Your Ubuntu release is not supported anymore.
> >          For upgrade information, please visit:
> >          [2]http://www.ubuntu.com/releaseendoflife
> >          Please install all available updates for your release before
> >      upgrading.
> >      It's only 4 months since 22.04 was released, it feels like there's
> >      very little overlap between releases.
> >
> >    Well, 21.10 is a Short Term Release but this is a conversation you need
> >    to have with people from Canonical.
> >    However, I had a 21.10 system (T500 ThinkPad) I was using for one
> >    development project. I dusted it down last Monday to work on a
> >    different project and discovered that it was End Of Life by one day. So
> >    I ran the GUI Software Updater program ( pressed ALT+F2 and typed in
> >    update-manager ), installed 387MB of updates. Then I ran Software
> >    Updater again and there was a button to press to perform the upgrade to
> >    22.04 which brought in over 1GB of dependencies for me and it all
> >    worked.
>
> If I run update-manager it fails with "Software updates are no longer
> provided for Ubuntu 21.10" and tells me to upgrade.  If I click on the
> upgrade button I get the same message as I get with 'do-release-upgrade'.
>
> My systems are pretty close to up to date.
>
> I *think* the problem may be that I have one package 'held back'
> (libpcre2-8-0) and I need to get that to be 'unheld back' before the
> release upgrade will work.
>
>
> --
> Chris Green

Release upgrades after a release goes EOL can be tricky, however there
are official instructions on how to do so here:
https://help.ubuntu.com/community/EOLUpgrades