EM can manage Unix OS? such as aix hp-unix.
Yes, it can manage OS as Target Host.
Refer: Discovering, Promoting, and Adding Targets
as well as os linux installation agent?
Once you install the agent on Linux host, Agent also monitored as a target.
YES，Monitoring a target only view infomaition？
Can you please explain your last requirement in detail?
I`m sorry, I just tested