Boot into read only snapshot and if you would like to roll back, run the following commands:


1. mount (note the partition that is mounted as "/", we use /dev/sda2 in this example)
2. sudo mount /dev/sda2 -o subvol=/ /mnt (instead of /dev/sda2 use the partition you have identified in #1)
3. sudo mv /mnt/@ /mnt/@_old (create backup of current rootfs subvolume)
4. sudo btrfs subvolume snapshot /mnt/@.snapshots/<XX>/snapshot /mnt/@ (where <XX> is the snapshot number you want to roll back to)
5. sudo reboot


!Note: When booting into a snapshot, expect a few error messages. Don't worry about them.  Snapshots are read-only and some components of Kali Linux would prefer to be able to write to the hard drive.