Update README.md

README.md

@@ -13,6 +13,7 @@ Btrfs snapshot managing bash script
 - Taking snapshots requires root priviledges. Take a snapshot with `snapsh -s SUBVOLUME` or `snapsh --snapshot SUBVOLUME`, where `SUBVOLUME` is the name of the source subvolume. You can add a description for the snapshot with the `-d | --description` option (must be used before the `-s` option)<br><br>Example with Fedora default btrfs layout with `root` and `home` subvolumes: <br> `snapsh -d "This is a snapshot" -s root` <br> This will create a snapshot called `root_snapshot_YYYY.MM.DD-hh:mm:ss` to the `snapshots` subvolume (or the one you defined with `SNAPSHOTS_LOCATION`), with a description "This is a snapshot"
 - Snapshots can be listed with `snapsh -l` or `snapsh --list`
 - Delete snapshots with the `-r` or `--remove` option. List snapshots first with `snapsh -l`, then delete snapshot with e.g. `snapsh -r 2`, where 2 is the number of the deletable snapshot in the `-l` listing. The list numbers always start from 1 and increment from there, so always check the number before deletion. Batch deletion might be implemented later.
+- Rollback to a snapshot with `snapsh --rollback NUMBER`, where NUMBER is the number listed in `snapsh -l`. The subvolume will be detected from the snapshot. E.g. `snapsh --rollback 14`. Script will ask to reboot system once done.
 
 ### Planned features:
 - separate config file