Implements https://btrfs.wiki.kernel.org/index.php/Incremental_Backup.
Requirements:
- root fs with btrfs
- usb disk with btrfs
- btrfs-tools
Usage:
btrup [options] <dest>
btrup -h | --help
Options:
-h, --help Show this message.
-p, --prune Prune old local snapshots.
Example:
sudo btrup -p /mnt/usbdisk/backup