只需以下几步即可
oracle@DB-MASTER-1 ~]$ emctl setpasswd dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.2.0.1.0
Copyright (c) 1996, 2009 Oracle Corporation. All rights reserved.
https://DB-MASTER-1:1158/em/console/aboutApplication
Please enter new repository password:
Repository password successfully updated.
[oracle@DB-MASTER-1 ~]$ emctl secure dbconsole -sysman_pwd oracle
Oracle Enterprise Manager 11g Database Control Release 11.2.0.1.0
Copyright (c) 1996, 2009 Oracle Corporation. All rights reserved.
https://DB-MASTER-1:1158/em/console/aboutApplication
DBCONSOLE already stopped... Done.
Agent is already stopped... Done.
Securing dbconsole... Started.
Securing dbconsole... Sucessful.
[oracle@DB-MASTER-1 ~]$ emctl status dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.2.0.1.0
Copyright (c) 1996, 2009 Oracle Corporation. All rights reserved.
https://DB-MASTER-1:1158/em/console/aboutApplication
Oracle Enterprise Manager 11g is not running.
[oracle@DB-MASTER-1 ~]$ emctl start dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.2.0.1.0
Copyright (c) 1996, 2009 Oracle Corporation. All rights reserved.
https://DB-MASTER-1:1158/em/console/aboutApplication
Starting Oracle Enterprise Manager 11g Database Control ..... started.
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Logs are generated in directory /opt/oracle/product/11.2.0/db/db-master-1_orcl/sysman/log
原文地址：http://longcar.blog.51cto.com/4420398/1698422
