I recently read that around 80% of all current web servers are still running some form of UNIX; and that is because it is cheap. RedHat Linux comes with X-Windows already integrated, installed, and working which makes the user interface icon driven and presents a friendly interface for the casual user. Last, RedHat Linux out benchmarks Windows NT 4.0 by a margin of 4 to 1 if I remember correctly.
Offered by Ron.
WB5KAN