1、启动dbconsole

 [Oracle@www.linuxidc.com ~]$ emctl start dbconsole

如果提示：OC4J Configuration issue. /opt/oracle/product/10.2.0/oc4j/j2ee/OC4J_DBConsol，则说明没有配置或没有创建

2、配置dbconsole

 [oracle@www.linuxidc.com ~]$ emca -config dbcontrol db

STARTED EMCA at Apr 21, 2009 2:21:41 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: orcl
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 ................ /opt/oracle/product/10.2.0

Database hostname ................ www.linuxidc.com
Listener port number ................ 1521
Database SID ................ orcl
Email address for notifications ...............
Outgoing Mail (SMTP) server for notifications ...............

-----------------------------------------------------------------
Do you wish to continue? [yes(Y)/no(N)]: Y
Apr 21, 2009 2:23:52 AM oracle.sysman.emcp.EMConfig perform
INFO: This operation is being logged at /opt/oracle/product/10.2.0/cfgtoollogs/emca/orcl/emca_2009-04-21_02-21-41-AM.log.
Apr 21, 2009 2:24:14 AM oracle.sysman.emcp.util.DBControlUtil secureDBConsole
INFO: Securing Database Control (this may take a while) ...
Apr 21, 2009 2:24:35 AM oracle.sysman.emcp.util.DBControlUtil secureDBConsole
INFO: Database Control secured successfully.
Apr 21, 2009 2:24:35 AM oracle.sysman.emcp.util.DBControlUtil startOMS
INFO: Starting Database Control (this may take a while) ...
Apr 21, 2009 2:26:15 AM oracle.sysman.emcp.EMDBPostConfig performConfiguration
INFO: Database Control started successfully
Apr 21, 2009 2:26:15 AM oracle.sysman.emcp.EMDBPostConfig performConfiguration
INFO: >>>>>>>>>>> The Database Control URL is https://www.linuxidc.com:5502/em