Quote Originally Posted by KC2UGV View Post
Just bear in mind, while there are many similarities between BSD and Linux, BSD is not Linux, it's a UNIX (Well, sorta, it never got a certification mark, or anything). There will be subtle differences in how things work.
BSD (with a Mach kernel) is what Mac OS X is based on, though, so if you get comfortable with the CLI in PC-BSD, you'll feel right at home with the OS X Terminal app.