wget https://lxc-webpanel.github.io/tools/install.sh -O - | sudo bash
This software only works on Ubuntu 12.04 or later. Despite of its performance, of course there are limitations, such as: you can only use host OS and architecture on guest. You can find more info on their website or this blog post.
So why LXC instead of Docker or Virtualization? because it's simpler :3 yes, both are different kind of animal, don't forget to check LXD and other alternatives too.