It's time to say goodbye to Ubuntu 20.10 "Groovy gorillaAs it reached the end of support on July 22, 2021.
As recently announced by the manufacturer of Ubuntu Canonical, the Ubuntu 20.10 version Groovy gorilla, will not be supported with software and security updates from July 22, 2021. This means that if you are using Ubuntu 20.10, you should seriously consider upgrading to a newer version as soon as possible.
Ubuntu 20.10 was released nine months ago on October 22, 2020 and was the first version of the Raspberry Pi 4 operating system. It used the kernel Linux 5.8 and had as default the GNOME 3.38 desktop environment.
However, because it was not an LTS (Long-Term Support) version, Ubuntu 20.10 could only be updated for nine months, until July 22, 2021. After that date, Canonical ceased to have updates for Groovy gorilla, which, over time, will become vulnerable to any kind of attack.
On July 21, 2021, Canonical released the latest security update for Ubuntu 20.10 (Groovy gorilla), so if you continue to use the distribution for a few more days or weeks until you are ready to upgrade to Ubuntu 21.04, you should be safe. However you should consider considering an upgrade as soon as possible.
Before proceeding with the upgrade to Ubuntu 21.04 (Hirsute Hippo), which has a newer kernel for better hardware support (Linux 5.11), and support for GNOME 40 and Wayland applications by default, it would be good to get a backup.
Ubuntu 21.04 will be supported for another six months, until the end of January 2022, but Canonical will release Ubuntu 21.10 (Impish Indri) on October 14, 2021, with the latest GNOME series in version 40 by default, kernel Linux 5.14 and many other improvements.