Enterprise Manager and OEM Agent commands in Oracle

Please login to database server with ssh as oracle user and run that commands.

Go to /bin path
su - grid12
cd agent/agent_inst/bin

How to start/stop Enterprise Manager
./emctl start dbconsole;
./emctl stop dbconsole;

for 12c grid EM
/home/grid12/oms/bin/emctl start oms
/home/grid12/oms/bin/emctl stop oms

How to start/stop Oem Agent
Be sure run root.sh as root user and run below commands as oracle user:
./emctl stop agent
./emctl start agent

How to check Oem Agent
./emctl status agent

How to restore Oem Agent
Run as grid12 user:
./emctl clearstate agent; and then
./emctl upload agent;