You can use standard backup tools. Here is a list of files that are critical:
- supervisor_logfile: /var/spool/supelog
- supervisor_logpath: /var/spool/qube
- qb_directory: /usr/local/pfx/qube
- /etc/my.conf
- /etc/qb.conf
- /etc/qbwrk.conf
- /etc/init.d/supervisor
- MySQL data_dir: /var/lib/mysql