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I was working on ubuntu 20.04, but at some point it was upgraded to 20.10. (There was no notice.) So, in etc/apt/sources.list, I changed the CODENAME to groovy->focal and tried to use apt update and upgrade. do.And it goes well.

If I use the EOL Release, is the only problem that I can't install package upgrade and install?

Or is there another problem?

Harzarics
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  • No problems if your box is offline... If online you put yourself, and others close to your (connected via networks) at risk... – guiverc Apr 19 '22 at 09:30
  • Ubuntu 20.10 (along with all flavors) is End-of-Life and thus unsupported on this site (https://askubuntu.com/help/on-topic), and many other Ubuntu sites, unless your question is specific to moving to a supported release of Ubuntu. https://fridge.ubuntu.com/2021/07/25/ubuntu-20-10-groovy-gorilla-end-of-life-reached-on-july-22-2021/ https://help.ubuntu.com/community/EOLUpgrades – guiverc Apr 19 '22 at 09:31

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An EOL Release does not receive updates, including security updates. The word "only" in your question, shows that you underestimate a risk that is very real and not to be underestimated.

If your computer is connected to a network (e.g. the internet) you do not want to use an EOL release.

Bruni
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