For more information, see the following books in the Oracle Enterprise Manager documentation set:
Oracle Enterprise Manager Cloud Control Basic Installation Guide
Oracle Enterprise Manager Cloud Control Advanced Installation and Configuration Guide
Oracle Enterprise Manager Cloud Control Administrator's Guide
Oracle Enterprise Manager Cloud Control Upgrade Guide
Oracle Enterprise Manager Framework, Host, and Services Metric Reference Manual
Oracle Enterprise Manager Command Line Interface
Oracle Enterprise Manager Cloud Control Extensibility Programmer's Guide
The latest versions of this and other Oracle Enterprise Manager documentation can be found at:
http://docs.oracle.com/en/enterprise-manager/
Oracle Enterprise Manager also provides extensive online help. Click Help on any Oracle Enterprise Manager page to display the online help system.