raspiBackup allows to create a kind of snapshot with option -M. It's a normal backup with two special properties:
- Snapshots will not be deleted by the selected backup strategy and will stay there until they are manually deleted.
- Snapshots have a description which is the parameter for option -M. This description is appended at the end of the backup directory name.
This allows to create a snapshot besides the usual backup and you can use the description to remember the purpose of the snapshot. That's convenient if you plan a software update or any other major change of your system. If the update fails then you can restore the snapshot easily and start over. If the update was successful delete the snapshot in the backup directory.
There is also a Youtube video available which explains raspiBackup snapshots and includes a demo.