3-2-1 Backup Rule
- 3: Keep 3 copies of backups
- 2: Store on 2 different media (local + remote)
- 1: At least 1 off-site copy
Features
- ✅ Automated file backup with exclusion patterns
- ✅ MySQL database dump with compression
- ✅ Automatic cleanup of old backups (>30 days)
- ✅ Remote sync to S3/compatible storage via rclone
- ✅ Backup integrity verification
- ✅ Cron-ready for daily automation
See zh-cn version for the complete bash script, recovery steps, and backup strategy table.