Management Agent software for the various platforms (operating systems) supported by Enterprise Manager Cloud Control can be downloaded to the Software Library using the Self Update console. Once a Management Agent is persisted to the Software Library, it can be installed on host machines that you want to bring under Cloud Control management using the Add Host Targets wizard.
For instructions on obtaining Management Agent software in both online and offline modes, see the section "Meeting Management Agent Software Prerequisites" in the Oracle Enterprise Manager Cloud Control Basic Installation Guide.