Comment by lproven

This is incorrect.

More than 1 Linux distributions have been tested, passed, and listed in the past... But you need to pay again every year, and recertify every new version, and they didn't bother keeping it up.

I described them and what this meant in some depth in this 2023 article:

https://www.theregister.com/software/2023/01/17/unix-is-dead...