Administrators are allowed the ability to reboot or shutdown hosts controlled by the farm remotely. This is a feature which you must have Qube administrative privileges. To use this feature, use the qbadmin command line. Keep in mind that shutting down a host will require an administrator to physically power it back on.
Remote reboot of a Worker host
% qbadmin worker --reboot worker_host
Where worker_host is a Worker host name or IP address.
Remote shutdown of the Worker
% qbadmin worker --shutdown worker_host