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I'm still using Ubuntu 19.04 because it's what was current when I installed the OS but it is no longer supported so I want to upgrade to 20.04 LTS (or even just 19.10).

This should be very simple. There are loads of tutorials on how to upgrade from from 19.10 or 18.04 to 20.04. But it seems like it's not possible from 19.04. Could this be true?

If I run sudo apt upgrade I get a bunch of 404 errors because the disco archives don't seem to exist anymore. But I ran:

$ sudo apt dist-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

$ sudo do-release-upgrade
Checking for a new Ubuntu release
Your Ubuntu release is not supported anymore.
For upgrade information, please visit:
http://www.ubuntu.com/releaseendoflife

Please install all available updates for your release before upgrading.

I tried

$ update-manager -c

And it told me I was no longer supported and needed updates but when I said "ok" to installing updates it gave me the exact same error.

I'm not sure what to do here. I can't update any more because I can't apt update. I guess I could manually set all my apt repos to the Eoan Ermine ones and update again. Is that what I need to do? Where do I set that?

QuinnF
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    Does this answer your question? How to install software or upgrade from an old unsupported release?. A fresh install of 20.04 is probably the easiest option. – mook765 May 02 '20 at 22:46
  • That was helpful because it let me run apt update successfully. But, I still get the exact same error when running do-release-upgrade – QuinnF May 02 '20 at 23:06
  • @karel I'd be happy to upgrade to 19.10 if that's easier. Unfortunately, I'm not able to upgrade at all to either new release – QuinnF May 02 '20 at 23:30
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    sudo apt update, sudo apt full-upgrade, sudo do-release-upgrade, in this order. Should bring you to 19.10, then the same game again to upgrade to 20.04. I'd prefer a fresh install, it's much quicker. – mook765 May 02 '20 at 23:39
  • FYI: I agree with what mook765 said; though I'd reboot & login to 19.10 & verify everything is good before I bumped to 20.04 (also reboot if required due if upgrades involved kernel or recommend rebooting too in prior steps. Yes it's far quicker to re-install, and skipping is in theory supported; but testing is all on you (for your installed packages unless you have no additional packages as that is not tested except to the next release) – guiverc May 03 '20 at 00:15
  • @mook765 Thanks for the answer. I'll probably just reinstall at this point. But I ran those commands in that order and I still get the error about being an unsupported version. – QuinnF May 03 '20 at 02:41

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