How to install LXD container hypervisor on Ubuntu 16.04 LTS

Originally published at: https://www.cyberciti.biz/faq/how-to-install-lxd-container-hypervisor-on-ubuntu-16-04-lts-server/

How do I install LXD container “hypervisor” to runs unmodified Debian/Ubuntu/CentOS Linux operating systems VM at incredible speed on a Ubuntu Linux 16.04 LTS server?