It is not even worth my time to argue with a senior member of the Bill Gates Kneepad Brigade(tm).
Linux is commonly used in data centers compared to Windows for a couple indisputable reasons: it scales better, is cheaper to administer when you have thousands of machines, and is more secure. That it is free does not matter, since many companies run monster Oracle instances on these servers which make the cost of operating system licenses utterly negligible. If Microsoft could produce an operating system that ran Oracle half as well as Linux does, that would be a good start.
We use Solaris for our Oracle requirements, which is more robust and mature than Linux, and I'd recommend to anyone. As for your name calling, typical when you Linux hounds realize you have no actual verifiable facts on your side.