You can use the SAP Management Console (SAP MC) to start and restart systems and instances.
UNIX only: Make sure that the host names defined in the DNS server match the names of the SAP system instance hosts. In particular, keep in mind that host names are case-sensitive. For example, if the names of the SAP system instance hosts are in upper case, but the same host names are defined in the DNS server in lower case, starting and stopping the system does not work.
If you want to start or restart remote systems or instances, make sure that you have registered them in the SAP Management Console (SAP MC).
You do not need to register SAP systems or instances installed on the local host, because the SAP MC displays them automatically.
You have started the SAP MC.
As of SAP MC version 7200, 313, 20, 42101 you can also start databases of SAP systems on all operating system platforms using the SAP MC.
If the database of the SAP system is not yet running, you might be also prompted for additional credentials of a user that is authorized to start the database.