Execute is the main entry point of the cluster command.

NewHpcutilCmd returns the root command.

NetDomain is the default network domain name.

TorqueHelperCert is the path of the TorqueHelper server certificate.

TorqueHelperPort is the port number of the Torque Helper service.

TorqueServerHost is the hostname of the Torque server.

Verbose is the flag to switch on/off the verbosed output of commands.