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This is the error when I type do-release-upgrade:

enter image description here

Error is An upgrade from 'groovy' to 'impish' is not supported with this tool.

Make sure that I did

sudo-apt-update   
sudo-apt-upgrade

sudo sed -i "s/old-releases/archive/g" /etc/apt/sources.list /etc/apt/sources.list.d/*.list
Artur Meinild
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ismail k
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    There is no direct upgrade from 20.10 to 21.10; you would need to upgrade to 21.04 first, but that interim release is no longer available. If you would like to upgrade to the latest interim release, you will need to make an installation USB and install overtop your current installation – matigo Jan 23 '22 at 11:24
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    You missed your window by a few days.. 20.10 upgraded as already stated by @matigo to hirsute, but if you check out https://changelogs.ubuntu.com/meta-release you'll note there is a "Supported: 0" or no longer supported because it's EOL (https://fridge.ubuntu.com/2022/01/21/ubuntu-21-04-hirsute-hippo-end-of-life-reached-on-january-20-2022/). You can upgrade via re-install rather easily with desktop installs; ie. no loss of files, and manually installed packages are auto-reinstall (if available in Ubuntu repositories for the new release) but you didn't specify your type of install. – guiverc Jan 23 '22 at 11:29
  • FYI: You should apt full-upgrade before you attempt do-release-upgrade though I suspect it'll make no difference in your case, given the error messages isn't reporting you have updates you've not yet applied (there are cases where apt upgrade cannot continue and you need to dist-upgrade or full-upgrade to apply upgrades; see man apt for more details if needed) 20.04 or the LTS release can go direct (not generally advised but possible), but you weren't on the LTS – guiverc Jan 23 '22 at 11:34
  • The only way to upgrade from Ubuntu 20.10 to 21.10 is by changing sources.list. However, that will more likely break your system. As mentioned by Guiverc and Matigo, reinstallation is the best option. Make sure you've a backup of everything important. – Error404 Jan 23 '22 at 11:37
  • guiverc : I did dist-upgrade and full-upgrade but the same error message had been displayed – ismail k Jan 23 '22 at 11:38
  • is there a command to reinstall? can i do it without usb? – ismail k Jan 23 '22 at 11:52
  • You can use whatever devices your hardware will boot from, be it CD, DVD, USB-thumb-drive, SSD, HDD, cflash, even magnetic tape IF your hardware can be made to boot from the media; ie. USB is only one choice. (FYI: I said I suspected it'd make no difference in your case; as the error message is different if that was your issue; your issue is 21.04 is EOL & you missed the release-upgrade window) – guiverc Jan 23 '22 at 12:04
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    Does this answer your question? How to install software or upgrade from an old unsupported release? – karel Jan 23 '22 at 19:02
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    Does this answer your question? Can I skip over releases when upgrading? – pLumo Jan 24 '22 at 12:21
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    I disagree with it being off-topic, as questions about updating to a supported release are on-topic. However, it is a duplicate. – pLumo Jan 24 '22 at 12:22
  • @guiverc -- how do I do a non-destructive "reinstall?" I've never heard of such a thing. – abalter Jan 25 '22 at 05:45
  • I'm involved with Lubuntu where it's called install using existing partition (I personally prefer upgrade via re-install) where I document it here - https://discourse.lubuntu.me/t/testing-checklist-understanding-the-testcases/2743 (search for "Install using existing partition:") That doc is geared for QA-testers, not end-users & works with all Ubuntu flavors... Key is to re-use existing partitions & don't format; the no-format is what triggers this type of install... It's far faster than release-upgrade & allows you to skip release during upgrade -- as always backup first – guiverc Jan 25 '22 at 05:53
  • You'll need to go thru all the intermediate releases until the last one. You should be able to upgrade by downloading the upgrade archives manually, and running them each in turn, following https://butlerraines.com/code-stuff/upgrading-end-life-eol-ubuntu-version-ubuntu-1904 => I'm doing it now, will keep you posted. – rcomblen Jan 26 '22 at 07:55
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    You can follow the directions here: https://help.ubuntu.com/community/EOLUpgrades/ – user1304680 Jan 29 '22 at 11:29

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