Windows has Powershell which has an amazing level of power in a system. Everything is an object, everything has properties that can be manipulated. I don't look after Windows infrastructure at all, but people I know who do rave about the level of control they get, and some of the stuff they do makes me jealous. My understanding is that the GUIs for Exchange etc have essentially changed to being skins on top of it and that's one of the changes that is allowing Microsoft to start promoting GUI-less versions of Windows for cloud servers etc.