Before we dive into the topic, let me introduce you my new friend catsay, a simple Go program which eats stdin and speaks like a cat: Cute! ... but it's not what I want to talk about. What makes this screenshot very exciting is, it's a Linux lightweight virtual machine running on Starina operating system! That said, this post is not about how hard it is to write a hypervisor (see my previous post for that). In fact, it's not that hard. The hardest part is to design how you interact with the hype...