opmnctl restartproc ias-component= | Restarts a particular system component |
opmnctl shutdown Stops opmn and all managed system components
The component name can be get with the status command: 
opmnctl status

Processes in Instance: instance1
---------------------------------+--------------------+---------+---------
ias-component                    | process-type       |     pid | status
---------------------------------+--------------------+---------+---------
coreapplication_obiccs1          | OracleBIClusterCo~ |    5868 | Alive
coreapplication_obisch1          | OracleBIScheduler~ |    4616 | Alive
coreapplication_obijh1           | OracleBIJavaHostC~ |    2116 | Alive
coreapplication_obips1           | OracleBIPresentat~ |     N/A | Down
coreapplication_obis1            | OracleBIServerCom~ |    5892 | Alive
The pid correspond to the process number and you can then retrieve the following executables:
Metrics
The opmcntl application can also be used to retrieve Dms Metrics for monitoring purpose: Weblogic - How to get DMS metrics with Opmnctl ?
Support
Verbose
The opmnctl verbose option enables you to obtain detailed information about the command you are executing. 
opmnctl verbose command
log
opmn.log ORACLE_INSTANCE\diagnostics/logs/OPMN/opmn
debug.log ORACLE_INSTANCE\diagnostics/logs/OPMN/opmn
logquery.log ORACLE_INSTANCE\diagnostics/logs/OPMN/opmn
service.log ORACLE_INSTANCE\diagnostics/logs/OPMN/opmn
opmn.out ORACLE_INSTANCE\diagnostics/logs/OPMN/opmn
Documentation / Reference