I'm using snapper with BTRFS under Ubuntu 16.04, and I'm confused about the mount and umount parameters. They are documented like this in the man page:   mount number       Mount a snapshot. Not required for all filesystem types.   umount number       Unmount a snapshot. Not required for all filesystem types.But where are the snapshots mounted? Does snapper read my mind to know, or just makes an educated guess?I know how to mount the snapshots using mount and the subvol ID, but I would like to know if these mount and umount options are just a joke  or something you can actually use.Thanks in advance.
What do snapper mount and snapper umount do?
btrfs