OEM–Oracle Enterprise Manager是一個圖形化的資料庫管理員工具。它為資料庫管理員提供了一個集中的系統管理工具，同時它也是一個用來管理、診斷和除錯多個數據庫的工具.

如下是Oracle Enterprise Manager安裝配置過程：

• 獲取幫助

[[email protected] admin]$ emca|grep recreate
-config dbcontrol db [-repos (create | recreate)] [-cluster] [-silent] [-backup] [parameters]: configure Database
 
 Control for a database
-config all db [-repos (create | recreate)] [-cluster] [-silent] [-backup] [parameters]: configure both Database Control and central agent management
-repos recreate: drop the current Database Control repository and recreate a new one

• 安裝OEM

[[email protected] admin]$ emca -config dbcontrol db -repos recreate

STARTED EMCA at May 14
 
, 2017 7:19:45 AM
EM Configuration Assistant, Version 11.2.0.3.0 Production
Copyright (c) 2003, 2011, Oracle.  All rights reserved.

Enter the following information:
Database SID: PROD
Listener port number: 1521
Listener ORACLE_HOME [ /u01/app/oracle/product/11.2.0/dbhome_1 ]:
Password for SYS user: 
Password for DBSNMP user: 
May 14
 
, 2017 7:19:58 AM oracle.sysman.emcp.util.GeneralUtil initSQLEngineLoacly
WARNING: ORA-28000: the account is locked

Password for SYSMAN user: 
Email address for notifications (optional):
Outgoing Mail (SMTP) server for notifications (optional):
-----------------------------------------------------------------

You have specified the following settings

Database ORACLE_HOME ................ /u01/app/oracle/product/11.2.0/dbhome_1

Local hostname ................ vastdata1.us.oracle.com
Listener ORACLE_HOME ................ /u01/app/oracle/product/11.2.0/dbhome_1
Listener port number ................ 1521
Database SID ................ PROD
Email address for notifications ...............
Outgoing Mail (SMTP) server for notifications ...............

-----------------------------------------------------------------
----------------------------------------------------------------------
WARNING : While repository is dropped the database will be put in quiesce mode.
----------------------------------------------------------------------
Do you wish to continue? [yes(Y)/no(N)]: y
May 14, 2017 7:20:07 AM oracle.sysman.emcp.EMConfig perform
INFO: This operation is being logged at /u01/app/oracle/cfgtoollogs/emca/PROD/emca_2017_05_14_07_19_44.log.
May 14, 2017 7:20:07 AM oracle.sysman.emcp.EMReposConfig invoke
INFO: Dropping the EM repository (this may take a while) ...
May 14, 2017 7:21:07 AM oracle.sysman.emcp.EMReposConfig invoke
INFO: Repository successfully dropped
May 14, 2017 7:21:07 AM oracle.sysman.emcp.EMReposConfig createRepository
INFO: Creating the EM repository (this may take a while) ...
May 14, 2017 7:24:27 AM oracle.sysman.emcp.EMReposConfig invoke
INFO: Repository successfully created
May 14, 2017 7:24:30 AM oracle.sysman.emcp.EMReposConfig uploadConfigDataToRepository
INFO: Uploading configuration data to EM repository (this may take a while) ...
May 14, 2017 7:25:12 AM oracle.sysman.emcp.EMReposConfig invoke
INFO: Uploaded configuration data successfully
May 14, 2017 7:25:15 AM oracle.sysman.emcp.util.DBControlUtil secureDBConsole
INFO: Securing Database Control (this may take a while) ...
May 14, 2017 7:26:24 AM oracle.sysman.emcp.util.DBControlUtil secureDBConsole
INFO: Database Control secured successfully.
May 14, 2017 7:26:24 AM oracle.sysman.emcp.util.DBControlUtil startOMS
INFO: Starting Database Control (this may take a while) ...
May 14, 2017 7:27:04 AM oracle.sysman.emcp.EMDBPostConfig performConfiguration
INFO: Database Control started successfully
May 14, 2017 7:27:04 AM oracle.sysman.emcp.EMDBPostConfig performConfiguration
INFO: >>>>>>>>>>> The Database Control URL is https://vastdata1.us.oracle.com:1158/em <<<<<<<<<<<
May 14, 2017 7:27:08 AM oracle.sysman.emcp.EMDBPostConfig invoke
WARNING:
************************  WARNING  ************************

Management Repository has been placed in secure mode wherein Enterprise Manager data will be encrypted.  The encryption key has been placed in the file: /u01/app/oracle/product/11.2.0/dbhome_1/vastdata1.us.oracle.com_PROD/sysman/config/emkey.ora. Ensure this file is backed up as the encrypted data will become unusable if this file is lost.

***********************************************************
Enterprise Manager configuration completed successfully
FINISHED EMCA at May 14, 2017 7:27:08 AM

• 檢視終端狀態

[[email protected] admin]$ emctl status dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.2.0.4.0
Copyright (c) 1996, 2013 Oracle Corporation.  All rights reserved.
https://vastdata1.us.oracle.com:1158/em/console/aboutApplication
Oracle Enterprise Manager 11g is running.
------------------------------------------------------------------
Logs are generated in directory /u01/app/oracle/product/11.2.0/dbhome_1/vastdata1.us.oracle.com_PROD/sysman/log

• 終端控制：
  emctl status dbconsole
  emctl start dbconsole
  emctl stop dbconcole

• 解決：
  進入C:\Windows\System32\drivers\etc
  編輯hosts檔案，新增如下地址並儲存
  192.168.80.11 vastdata1.us.oracle.com

再次登入即可開啟~~~