Michael Voight has announced that he is working on a boot environment manager for DragonFly BSD. The command line utility takes snapshots of HAMMER2 filesystems and helps the user set up boot environments. This allows users to rollback to previous versions of the operating system's packages and configuration if something breaks the operating system. "A quick overview is that this is a C implementation of beadm on FreeBSD/Illumos, but specifically for DragonFly BSD and HAMMER2. The utility creates snapshots of every mounted HAMMER2 filesystem using the name given on the command line as an identifier, so for example, if you run 'sudo dfbeadm -c testing', a HAMMER2 filesystem 'nvme0s1d at ROOT' gets a new snapshot called 'nvme0s1d at ROOT:testing'. It'll create a backup copy of your fstab in /etc/fstab.bak before installing the new fstab for the boot environment."
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