Ubuntu 18.04 LTS and Linux Mint 19.x distributions? If you are still using these distributions, it is recommended that you upgrade as soon as possible.
Canonical has issued a reminder to users that Ubuntu 18.04 LTS will be discontinued on April 30, 2023, and urges them to upgrade as soon as possible.
Users may need to upgrade to Ubuntu 20.04 LTS and then to 22.04 LTS, and if you only want to upgrade once, Ubuntu 20.04 LTS will be available until April 2025.
The 19.x version of Linux Mint will also be discontinued in April this year, but the upgrade process is not as simple as Ubuntu and users may need to reinstall.