Linux Backup Software
System snapshots, file backups, encrypted backups and file synchronisation.
Different tools protect against different problems. System snapshots help you undo a bad update. File backups keep copies of your data, ideally on another drive or off-site. Encrypted backups protect those copies. File synchronisation mirrors files, but on its own it isn't a complete backup: a deletion or corruption can be synchronised too.
System snapshots
Restore the operating system to an earlier state.
File and encrypted backup
Versioned, deduplicated and often encrypted backups.
File synchronisation
Keep folders in step; combine with versioned backups for protection.