http://www.ghostbsd.org/thank-you/
https://mudongliang.github.io/2017/09/27/how-to-install-qemu-kvm-qemu-kvm-and-gui-virt-manager-in-ubuntu.html
https://techpiezo.com/linux/setup-virtual-machine-using-qemu-in-ubuntu/

https://www.ostechnix.com/install-oracle-virtualbox-freebsd/

https://www.ghostbsd.org/20.04.1_release_announcement
https://en.wikipedia.org/wiki/DragonFly_BSD
https://en.wikipedia.org/wiki/FreeBSD_jail
https://en.wikipedia.org/wiki/QEMU

https://www.digi77.com/linux-kodachi/