Containers bring a skinny new world of virtualization to Linux
Once upon a time, if you ran a data center, you used virtual machine (VM) management programs (i.e., hypervisors) There was no other practical choice. This dates all the way back to the good old IBM 360 mainframe days with CP-67/CMS in 1967. Today, our data centers and clouds run more advanced hypervisors. Amazon Web Services (AWS), for example, is made up of nearly half-a-million Linux servers running the Xen hypervisor, while Microsoft's Azure cloud relies upon its Hyper-V hypervisor.