Oracle Em的端口规则
今天实验了一下 Oracle Em的端口，规则如下：
第一个实例默认端口是1158，
第二个实例是5500，因为1158，已经被抢占了。
后面有新的实例，依次是5501，5502.......

部分日志如下，注意端口号：

TZ set to PRC
Oracle Enterprise Manager 10g Database Control Release 10.2.0.1.0  
Copyright (c) 1996, 2005 Oracle Corporation.  All rights reserved.
http://rhel5.com:1158/em/console/aboutApplication

TZ set to PRC
Oracle Enterprise Manager 10g Database Control Release 10.2.0.1.0  
Copyright (c) 1996, 2005 Oracle Corporation.  All rights reserved.
http://rhel5.com:5500/em/console/aboutApplication

TZ set to PRC
Oracle Enterprise Manager 10g Database Control Release 10.2.0.1.0  
Copyright (c) 1996, 2005 Oracle Corporation.  All rights reserved.
http://rhel5.com:5501/em/console/aboutApplication