hw <h...@adminart.net> wrote: > Hi, > > with btrfs, how do I make a snapshot of the root file system? The > purpose is to update software and being able to go back to a previous > state if necessary. > > There doesn't seem to be a command to create snapshots but only > subvolumes? How does a subvolume turn into a snapshot? (The root > file system is, of course, not on a subvolume.) > > How do I merge snapshots? IIRC, when you remove a ZFS snapshot, the > older state is merged to the state the snapshot is in. Apparently > btrfs can only delete snapshots --- and it seems like a bad idea to > delete the root file system. How would I boot from it when it's been > deleted? > > Can I make a snapshot on a different volume? The manpage doesn't say > that the destination of a subvolume must be on the same volume, and in > any case, I should be able to do that.
google says: https://archive.kernel.org/oldwiki/btrfs.wiki.kernel.org/index.php/SysadminGuide.html#Snapshots https://wiki.archlinux.org/title/btrfs https://wiki.archlinux.org/title/snapper https://fedoramagazine.org/working-with-btrfs-snapshots/ https://linuxhint.com/use-btrfs-snapshots/
