ubuntu versions - SERP Analysis

https://releases.ubuntu.com/

https://en.wikipedia.org/wiki/Ubuntu_version_history

https://askubuntu.com/questions/12493/how-can-i-find-the-version-of-ubuntu-that-is-installed

https://ubuntu.com/about/release-cycle

https://documentation.ubuntu.com/project/release-team/list-of-releases/

https://endoflife.date/ubuntu

https://www.cherryservers.com/blog/check-ubuntu-version

https://www.reddit.com/r/linux4noobs/comments/11qq4xb/are_earlier_ubuntu_versions_still_available/

https://www.dreamhost.com/blog/check-ubuntu-version/