Starting And Stopping OEM/OMS 12c Agent and Server.

[oracle@afr bin]$ pwd
/u01/app/oracle/Middleware/agent/agent_inst/bin

[oracle@afr bin]$ ./emctl stop agent
Oracle Enterprise Manager 12c Cloud Control 12.1.0.1.0
Copyright (c) 1996, 2012 Oracle Corporation.  All rights reserved.
Stopping agent ..... stopped.

[oracle@afr bin]$ ./emctl start agent
Oracle Enterprise Manager 12c Cloud Control 12.1.0.1.0
Copyright (c) 1996, 2012 Oracle Corporation.  All rights reserved.
Starting agent ........................................... started.



[oracle@afr bin]$ pwd
/u01/app/oracle/Middleware/oms/bin

[oracle@afr bin]$ ./emctl stop oms -all
Oracle Enterprise Manager Cloud Control 12c Release 12.1.0.1.0
Copyright (c) 1996, 2012 Oracle Corporation.  All rights reserved.
Stopping WebTier...
WebTier Successfully Stopped
Stopping Oracle Management Server...
Oracle Management Server Successfully Stopped
AdminServer Successfully Stopped
Oracle Management Server is Down

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Commonly Configured OEM Alerts and Their Solutions.

Archiver Hung Alert Log Error

Cause: Possible cause is that the destination LOG_ARCHIVE_DEST_n is full.
Action: Check alert log file and archiver for additional information. 

ORA-01578:ORACLE data block corrupted

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