LSF Services are managed a number of different ways. You can use the SAS Grid Manager Module for SAS Environment Manager or Platform RTM for SAS web interfaces along with the 'egosh' command if you prefer a command line interface.
The SGM and RTM web interfaces allow you to stop and start a service by selecting the service and performing the stop/start actions.
egosh would require you to
- logon (egosh user logon -u admin -x <admin_pwd>)
- restart the service (egosh service instance restart -s <service_name>)
- logoff (egosh user logoff)
I found more information about egosh command here.