环境：Linux
操作语句：
[oracle@ora11r2 ~]$ sqlplus /nolog
SQL*Plus: Release 11.1.0.6.0 -
Production on Thu Jun 10 18:22:16 2010
Copyright (c) 1982, 2007,
Oracle. All rights reserved.
SQL>
startup
ORA-01031:
insufficient privileges
SQL> quit
[oracle@ora11r2 ~]$ sqlplus /
as sysdba
--得用dba登录才行，汗。。。。。
SQL*Plus: Release 11.1.0.6.0 - Production on Thu Jun
10 18:25:14 2010
Copyright (c) 1982, 2007, Oracle. All rights
reserved.
Connected to an idle instance.
SQL>
startup
ORACLE instance
started.
Total System Global Area 422670336 bytes
Fixed
Size
1300352 bytes
Variable
Size
243271808 bytes
Database
Buffers 171966464
bytes
Redo
Buffers
6131712 bytes
Database mounted.
Database opened.
SQL>