rsnapshot-based "tape rotation" backups, using USB HDDs

This package provides a bare-minimum wrapper around rsnapshot to ensure it has sensible defaults.

Features

• Stores incrementals as hard links, like Apple Time Machine (active ingredient rsync --link-dest).
• USB HDD can be read by Windows desktops.
• Sends a success/failure email.

Quick start guide

1. Download or build datasafe-lite deb (debuild).
2. Install it (apt install ./datasafe-lite*.deb).
3. Plug in a USB HDD.
4. Erase it (datasafe-lite-init /dev/disk/by-id/usb-SanDisk_Ultra_Fit_4C530001031224113231-0:0).
5. Done!

Configuration

• datasafe-lite sends a success/failure email when it finishes. If you don't receive one, check that system email is working. For more detailed logs try journalctl --unit=datasafe-lite.
• By default only /home /srv and /var/mail are backed up. Change this in /etc/datasafe-lite.conf.
• The default retention policy is 56d 52w 24m 10y. You MUST have at least one daily. You MUST NOT have any hourly.