CP-67 was a hypervisor, a different model altogether to the chroot/jails/zones/linux namespace evolution, the sidequest of HP Vaults and various workload partitioning schemes on systems like AIX, or the grand-daddy of chroot line, Plan 9 namespace system.

yes, i agree, except that doesn't chroot predate plan9 by almost a decade?

Thank you, somehow I missed the part of the history! Yes indeed, chroot() starts in 1979 patches ontop of V7 kernel. Plan9 namespaces probably evolved from there as Research Unix V8 was BSD based.

thanks! i didn't have any idea 8th edition was bsd-based

Certainly, I was only focusing on the UNIX side of the history.

understandable!