between Linux and Unix? Or is Unix just a general term that describes a style of OS? If not, then what makes pure UNIX as opposed to Linux. I know that Solaris is supposedly UNIX as well as FreeBSD (well it's supposed to be a UNIX "type"?). So is there a pure UNIX? Or is it all UNIX? Most importantly, when online game developers want people with UNIX skills what are they asking for specifically? I've heard that when you're running a large server UNIX is the only way go, but what system are these using? Bah ... most likely Solaris, but tell me if I'm wrong.