Most of the conversation about virtualization usually centers on virtual machines (VMs). This is perfectly reasonable because VMs are the things you “see and touch.” However, when you pull back the covers on virtualization, you’ll find that the hypervisor does much of the important work. In fact, the hypervisor is the thing that is doing the virtualization and pulling the strings for each VM.
A hypervisor is
An operating system for operating systems
A Virtual Machine (VM) Monitor
That’s pretty much it—nice ...