I have a dedicated server that I use to sell hosting to a limited amount of clients (I'm a web designer).
I'd like to setup a new Linux system using virtual machines, so that each one of my clients would have his own virtual machine.
To do this I was looking into Ubuntu VM builder. Is it any good? Can a virtual machine be setup as a server and mapped to a domain name (like mycompany.com)? How is this setup called?