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Setup: I have installed Oracle Virtualbox 6.1.40 on my Windows 11 host. Running an Ubuntu 21.10 VM.

Since, Ubuntu 21.10 has reached EOL, I have tried to upgrade it referring to Upgrade Ubuntu desktop. I am getting the following error. What would be the reason?

$ sudo apt update
Ign:1 http://in.archive.ubuntu.com/ubuntu impish InRelease
Ign:2 http://security.ubuntu.com/ubuntu impish-security InRelease
Ign:3 http://in.archive.ubuntu.com/ubuntu impish-updates InRelease
Err:4 http://security.ubuntu.com/ubuntu impish-security Release
  404  Not Found [IP: 91.189.91.39 80]
Ign:5 http://in.archive.ubuntu.com/ubuntu impish-backports InRelease
Err:6 http://in.archive.ubuntu.com/ubuntu impish Release
  404  Not Found [IP: 91.189.91.38 80]
Err:7 http://in.archive.ubuntu.com/ubuntu impish-updates Release
  404  Not Found [IP: 91.189.91.38 80]
Err:8 http://in.archive.ubuntu.com/ubuntu impish-backports Release
  404  Not Found [IP: 91.189.91.38 80]
Reading package lists... Done
E: The repository 'http://security.ubuntu.com/ubuntu impish-security Release' no longer has a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://in.archive.ubuntu.com/ubuntu impish Release' no longer has a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://in.archive.ubuntu.com/ubuntu impish-updates Release' no longer has a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://in.archive.ubuntu.com/ubuntu impish-backports Release' no longer has a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
Bhuvan
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  • Looks like networking issue? – Utkarsh Chandra Srivastava Dec 28 '22 at 12:26
  • 21.10 is now EOL https://ubuntu.com/about/release-cycle – graham Dec 28 '22 at 12:34
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    Thanks @24601, I am upgrading as it reached EOL. – Bhuvan Dec 28 '22 at 12:37
  • Thanks @Pilot6. The post helped me to understand the reason for getting the error message. I see, the resolution given by the community was quite lengthy. Most of them talked about updating the system file /etc/apt/sources.list. May be that was the case with the older Ubuntu versions. I could upgrade my Ubuntu 21.10 to 22.04 using the GUI program "Software Updater" in a simpler way. – Bhuvan Dec 28 '22 at 13:42
  • Ubuntu 21.10 (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/2022/07/19/ubuntu-21-10-impish-indri-end-of-life-reached-on-july-14-2022/ – guiverc Dec 28 '22 at 21:45
  • When a release goes EOL it's archives are moved to old-releases. The instructions tell you how to deal with this, so you can fully upgrade & then release-upgrade to the next release. Yes it's more complex when you're using a release where the next-release is also EOL (*making yours easier given 22.04 was a LTS & isn't EOL) with the instructions covering all cases. – guiverc Dec 28 '22 at 21:49

1 Answers1

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I upgraded my Ubuntu 21.10 to 22.04 using the GUI program "Software Updater" in a simpler way without manually updating any of the system file as suggested in the post How to install software or upgrade from an old unsupported release?

Bhuvan
  • 128