On Sun, 2023-10-01 at 10:51 +0100, debian-u...@howorth.org.uk wrote: > 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:
Thanks! It still doesn't make much sense ...
