一直使用sqlplus来管理数据库，最近尝试了一下EM，感觉还是比较好用的。

----卸载
oracle@primary ebank]$ emca -deconfig dbcontrol db

STARTED EMCA at Jul 1, 2010 7:24:42 AM
EM Configuration Assistant, Version 10.2.0.1.0 Production
Copyright (c) 2003, 2005, Oracle.  All rights reserved.

Enter the following information:
Database SID: ebank

Do you wish to continue? [yes(Y)/no(N)]: y
Jul 1, 2010 7:24:45 AM oracle.sysman.emcp.EMConfig perform
INFO: This operation is being logged at /home/db/oracle/product/10.2.0/cfgtoollogs/emca/ebank/emca_2010-07-01_07-24-42-AM.log.
Jul 1, 2010 7:24:46 AM oracle.sysman.emcp.EMDBPreConfig performDeconfiguration
WARNING: EM is not configured for this database. No EM-specific actions can be performed.
Enterprise Manager configuration completed successfully
FINISHED EMCA at Jul 1, 2010 7:24:46 AM

----重建
[oracle@primary ebank]$ emca -config dbcontrol db -repos recreate

STARTED EMCA at Jul 1, 2010 7:24:54 AM
EM Configuration Assistant, Version 10.2.0.1.0 Production
Copyright (c) 2003, 2005, Oracle.  All rights reserved.

Enter the following information:
Database SID: ebank
Listener port number: 1521
Password for SYS user: 
Password for DBSNMP user: 
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 ................ /home/db/oracle/product/10.2.0

Database hostname ................ primary
Listener port number ................ 1521
Database SID ................ ebank
Email address for notifications ...............
Outgoing Mail (SMTP) server for notifications ...............

-----------------------------------------------------------------
Do you wish to continue? [yes(Y)/no(N)]: y
Jul 1, 2010 7:25:13 AM oracle.sysman.emcp.EMConfig perform
INFO: This operation is being logged at /home/db/oracle/product/10.2.0/cfgtoollogs/emca/ebank/emca_2010-07-01_07-24-54-AM.log.
Jul 1, 2010 7:25:15 AM oracle.sysman.emcp.EMReposConfig dropRepository
INFO: Dropping the EM repository (this may take a while) ...
Jul 1, 2010 7:25:17 AM oracle.sysman.emcp.EMReposConfig invoke
INFO: Repository successfully dropped
Jul 1, 2010 7:25:17 AM oracle.sysman.emcp.EMReposConfig createRepository
INFO: Creating the EM repository (this may take a while) ...
Jul 1, 2010 7:28:02 AM oracle.sysman.emcp.EMReposConfig invoke
INFO: Repository successfully created
Jul 1, 2010 7:28:17 AM oracle.sysman.emcp.util.DBControlUtil secureDBConsole
INFO: Securing Database Control (this may take a while) ...
Jul 1, 2010 7:29:51 AM oracle.sysman.emcp.util.DBControlUtil secureDBConsole
INFO: Database Control secured successfully.
Jul 1, 2010 7:29:51 AM oracle.sysman.emcp.util.DBControlUtil startOMS
INFO: Starting Database Control (this may take a while) ...
Jul 1, 2010 7:31:34 AM oracle.sysman.emcp.EMDBPostConfig performConfiguration
INFO: Database Control started successfully
Jul 1, 2010 7:31:34 AM oracle.sysman.emcp.EMDBPostConfig performConfiguration
INFO: >>>>>>>>>>> The Database Control URL is https://primary:1158/em <<<<<<<<<<<
Enterprise Manager configuration completed successfully

----查看状态

[oracle@primary bdump]$ emctl status agent
TZ set to US/Eastern
Oracle Enterprise Manager 10g Database Control Release 10.2.0.4.0 
Copyright (c) 1996, 2007 Oracle Corporation.  All rights reserved.
---------------------------------------------------------------
Agent Version     : 10.1.0.6.0
OMS Version       : 10.1.0.6.0
Protocol Version  : 10.1.0.2.0
Agent Home        : /home/db/oracle/product/10.2.0/primary_ebank
Agent binaries    : /home/db/oracle/product/10.2.0
Agent Process ID  : 8766
Parent Process ID : 7325
Agent URL         : https://primary:3938/emd/main
Started at        : 2010-07-01 07:31:32
Started by user   : oracle
Last Reload       : 2010-07-01 07:31:32
Last successful upload                       : 2010-07-01 07:34:24
Total Megabytes of XML files uploaded so far :     4.20
Number of XML files pending upload           :        0
Size of XML files pending upload(MB)         :     0.00
Available disk space on upload filesystem    :    10.52%
---------------------------------------------------------------
Agent is Running and Ready

----查看使用了哪个端口

[oracle@primary ~]$ cat $ORACLE_HOME/install/portlist.ini
Enterprise Manager Console HTTP Port (ebank) = 1158
Enterprise Manager Agent Port (ebank) = 3938

----启动服务

[oracle@primary ~]$ emctl start dbconsole
TZ set to US/Eastern
Oracle Enterprise Manager 10g Database Control Release 10.2.0.4.0 
Copyright (c) 1996, 2007 Oracle Corporation.  All rights reserved.
https://primary:1158/em/console/aboutApplication
Starting Oracle Enterprise Manager 10g Database Control ................... started.
------------------------------------------------------------------
Logs are generated in directory /home/db/oracle/product/10.2.0/primary_ebank/sysman/log

----停止服务

[oracle@primary ~]$ emctl stop dbconsole
TZ set to US/Eastern
Oracle Enterprise Manager 10g Database Control Release 10.2.0.4.0 
Copyright (c) 1996, 2007 Oracle Corporation.  All rights reserved.
https://primary:1158/em/console/aboutApplication
Stopping Oracle Enterprise Manager 10g Database Control ...
 ...  Stopped.