Tema: isolation
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FreeBSD jails: an administrative overview of jail.conf, jls, jexec and resource limits with rctl
A jail extends chroot(2) with its own process, network and (optionally) resource view, configured declaratively in jail.conf rather than via ad hoc jail(8) command lines. jls lists running jails, jexec enters one, and rctl caps what a jail's processes may consume — all administered from the host, which is also where compromise of one jail is meant to be contained.
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