QNAP NAS crontab reset
Crontab entries don't survive reboot
crontab se elimina al reiniciar el NAS, solución:
- Edit /etc/config/crontab and add your custom entry.
- Run 'crontab /etc/config/crontab' to load the changes.
- Restart cron, i.e. '/etc/init.d/crond.sh restart'