You can find instructions how to create Ubuntu Jails inside FreeBSD. There was an experimental Docker port for FreeBSD some years ago and it was actually worki

You can find instructions how to create Ubuntu Jails inside FreeBSD. There was an experimental Docker port for FreeBSD some years ago and it was actually working. I think it is mentioned here https://wiki.freebsd.org/Docker https://wiki.freebsd.org/Docker. However, it wasn't extremely useful as it didn't reach maturity, and because FreeBSD already had Jails. Which we were already using in production for the past ~15 years.