The mythology and history tell us of great struggles between sworn enemies. David and Goliath, Caesar and Brutus, Robespierre and Louis XVI are only a few. But for some years now in addition to this huge list we have two big names in the information technology! The multinational Microsoft and the GNU/Linux open source operating system. The struggles between the two never ends!While Microsoft is trying by all means to keep under its control the market of the desktop, Linux itself in recent years is reaching incredibly important goals, mostly on the servers and embedded systems (Android ?). Despite the low blows of Microsoft, we can just take a look at the mythological UEFI chips, Linux does not give up though. Indeed, it always win a larger slice of users thanks to its distributions. Each of which, of course, choose a different path.