Тема: boot-environments
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Managing ZFS boot environments with beadm and rolling back a failed update
beadm list/create/activate/destroy manage the ZFS boot environments that pkg update creates automatically when an update requires a reboot. Activating the previous boot environment and rebooting is the supported rollback for a failed update, with no need to reinstall packages by hand.
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ZFS boot environments with bectl: a rollback path around FreeBSD and package upgrades
bectl clones the root ZFS dataset into a boot environment in seconds; creating one before a freebsd-update or large pkg upgrade gives an instant, loader-menu-selectable way back to a known-good system, independent of and in addition to freebsd-update's own patch/install/rollback machinery.
Машиночитаемо: JSON