OEM Agent

---Agent bin location 

             /app/oracle/agent11g/bin                                                 --11g grid control

/u01/app/oracle/agent12c/core/12.1.0.5.0/perl/bin          -- 12c cloud

$AGENT_HOME/bin

---Agent log location

$AGENT_HOME/sysman/log

 ---- Checking agent status 

ps -ef | grep em

ps -ef | grep agent

ps -ef | grep emctl

              bin>emctl pingOMS

              bin>emctl status agent

              bin>emctl stop agent

              bin>emctl start agent

              bin>emctl upload agent

--  Creating Blackout 

emctl start blackout CHG# -nodeLevel -d 08:00
  The -nodeLevel option is used to specify a blackout for all the targets on the host; in other words, all the targets that the Management Agent is monitoring, including the Management Agent host itself. The -nodeLevel option must follow the blackout name. If you specify any targets after the -nodeLevel option, the list is ignored

emctl start blackout CHG# -nodeLevel -d 08:00

emctl status blackout CHG#

emctl stop blackout CHG#

OMS 

OMS log location

 /u01/oracle/product/oms11g/em/EMGC_OMS1/sysman/log