oracle启动dbconsole提示connection refused的解决办法
$ emctl start dbconsole
执行命令后，提示以下错误，并在日志中看到如下信息：
It puts up all the “……..” dots for about 2 mins, and then states FAILED. Here is the first error message in the /oracle/10g/db_1/localhost.localdomain_ACT1/sysman/log/emdctl.trc)
2009-7-3 10:09:21 Thread-4144096448 WARN http: snmehl_connect: connect failed to (localhost.localdomain:1830): Connection refused (error = 111)
原因：
要使用 OEM 或 iSQL*Plus，必须先启动监听器。
解决办法：
先启动监听器而后在执行命令
$ lsnrctl start
$ emctl start dbconsole
