FreeBSD is not Linux, BTW.
And maintaining/admin Linux is quite different across some distros. That is why some software will run under Ubuntu, but not RHEL, will run under Fedora, but not Debian.
My RHCE does not transfer seamlessly to Ubuntu.
Understood. I sit between two RHCEs, but they’re both fluent in Debian-based Linux as well. And while I’m getting strong in Bash, I’m teaching them Powershell, and they love it. The opportunities for crossover are immense in IT.