I use timeshift for this. It claims to use btrfs as an option. I've only used rsync on extra, and that has saved my bacon a few times
All the best Keith BAINBRIDGE +61 (0)447 667 468 keithr...@gmail.com UTC + 10 >From my Apad On Sun, 1 Oct 2023, 15:10 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. > >
