Oracle10g启动em遇到问题

oracleq0g启动em问题经常发生，比如IP变了，实例名称变了等 都可能使EM无法启动

Microsoft Windows XP [版本 5.1.2600]
(C) 版权所有 1985-2001 Microsoft Corp.

C:\Documents and Settings\Administrator>emctl start dbconsole
Environment variable ORACLE_SID not defined. Please define it.

C:\Documents and Settings\Administrator>set ORACLE_SID=hawking

C:\Documents and Settings\Administrator>emctl start dbconsole
OC4J Configuration issue. D:\oracle\product\10.2.0\db_1/oc4j/j2ee/OC4J_DBConsole
_192.168.1.101_hawking not found.

解决办法：
把主机名解析到ip地址
也就是
192.168.1.101 jujumao

再次重新启动 就OK
C:\Documents and Settings\Administrator>emctl start dbconsole
Oracle Enterprise Manager 10g Database Control Release 10.2.0.1.0
Copyright (c) 1996, 2005 Oracle Corporation. All rights reserved.

Starting Oracle Enterprise Manager 10g Database Control ...OracleDBConsolehawkin
g 服务正在启动 ................
OracleDBConsolehawking 服务已经启动成功。