今天做实验为了好识别机器随手用hostnamesource命令更改了linux主机名然后启动数据库报如下错误：[oracle@sourcedbs]$sqlplus/as ..
localhost.localdomain localhost
更改后启动数据库正常，虚拟主机，网站空间，如下所示：
[root@oracle ~]# su - oracle
[oracle@source ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.2.0 Production on Sat Aug 24 20:17:45 2013
Copyright (c) 1982, 2010, Oracle. All rights reserved.
Connected to an idle instance.
SQL> startup
ORACLE instance started.
Total System Global Area 1252663296 bytes
Fixed Size 2226072 bytes
Variable Size 973080680 bytes
Database Buffers 268435456 bytes
Redo Buffers 21088 bytes
Database mounted.
Database opened.
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