If you have to administer an Oracle Real Application Clusters (Oracle RAC) databases and instances using the Server Control Utility (SRVCTL).
The Server Control (SRVCTL) utility is installed on each node by default. You can use SRVCTL to start and stop the database and instances, manage configuration information, and to move or remove instances and services. You can also use SRVCTL to add services. SRVCTL also manages configuration information.
Syntax:
srvctl command object [parameters]
To see the command syntax and a list of options for each SRVCTL command, from the command line enter:
srvctl command (or verb) object (or noun) -h[mai mult...]