# /mnt/backup-usb/runbooks/RECOVERY-STEPS.txt
1) Plug BACKUP_USB into the standby server.
2) Boot standby server (same Ubuntu major version preferred).
3) Become root: sudo -i
4) Dry-run first (no writes): DRY_RUN=1 /mnt/backup-usb/runbooks/promote-backup-server.sh
5) Real restore: /mnt/backup-usb/runbooks/promote-backup-server.sh
6) Verify services: systemctl is-active mariadb php8.3-fpm nginx
7) Verify local HTTPS: curl -k -I https://127.0.0.1
8) Update DNS/public routing to point traffic at standby server.
9) Verify external URL health checks.