And even more obscure languages like Forth and Octave. The only thing to watch out for is that they run FreeBSD (instead of a more "normal" distribution) so if you're used to Linux-as-seen-on-Debian-or-Ubuntu there are a few things that are different (but so cozy).
For what it's worth, FreeBSD is actually it's own thing and not Linux at all. It's descended from Berkeley Unix and has no code in common with Linux or GNU (though it can still run software that's cross-compatible).
Correct - but if you're normally interacting with Linux boxes on the command line you're probably not going to be too far from home since the _programs_ behave mostly-the-same.