You need to execute a task as root user on a Symantec Messaging Gateway (SMG) appliance.
As per Symantec Policy, this is not supported and also not recommended. Any root level modifications if not performed by Symantec support to resolve technical problems take the appliance out of full support. If an appliance is not under full support, Symantec can require a customer to restore the appliance to its unmodified state before providing any additional support.
Contact Symantec Technical Support for more information.