密码文件导致sys用户as sysdba无法登陆
现象如下：
[oracle@test1 ~]$ sqlplus system/oracle@prod
SQL*Plus: Release 10.2.0.1.0 - Production on Fri May 30 10:58:46 2014
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
SQL...