As far as I know it has always used Linux, but it could've been changed over the years. In any case, the problem is of course having BtS on the server, which requires far too much space. Silly, because for the pitboss you don't need to install the whole game with it's sound and video files. (Not that I blame Firaxis for that; pitboss is only used by less than 1% of all civ-players.) I only have 600 MB at present.
So how about CDZ then?
