Enterprise Manager Cloud Control is the new name for what was previously know as Enterprise Manager Grid Control. Depending on the source of the material, you may still see the product described as Grid Control.
This article describes the installation of Oracle Enterprise Manager Cloud Control 12c Release 1 on Oracle Linux 5.7 and 6.1. (x86_64).
Databases earlier than 11.2.0.2 will require patches.
Separate machine for the middleware is best for configuration, keep in mind this is not a replacement for EM database control.
You could for testing purposes create an environment where the OMS and the database are running on the same machine.
Also you will need a database that the product uses to
OEL Linux is best / 8GB / 50GB or more of disk
Create a directory to hold the middleware on the linux machine
XWindows installer will need to be config’d so you can run the installer in graphical mode
Agent install for the databases that will be monitored
Only Oracle Management Agent 12c can be used with Cloud Control 12c