BSD jails date back to FreeBSD 4, which was released in 2000. Edit: I started questioning my memory of this, so I poked around some. Poul-Henning Kamp did the

BSD jails date back to FreeBSD 4, which was released in 2000. Edit: I started questioning my memory of this, so I poked around some. Poul-Henning Kamp did the initial work in April, 1999, here is the commit: https://svnweb.freebsd.org/base?view=revision&revision=46155 https://svnweb.freebsd.org/base?view=revision&revision=46155 More details from him about it: http://phk.freebsd.dk/sagas/jails/ http://phk.freebsd.dk/sagas/jails/