UNIX系统下启动ORACLE数据库

$ sqlplus /nolog

SQL*Plus: Release 9.2.0.8.0 - Production on Sun May 24 14:33:19 2009

Copyright (c) 1982, 2002, Oracle Corporation.  All rights reserved.

SQL> conn /as sysdba
Connected.
SQL> startup
ORA-01081: cannot start already-running ORACLE - shut it down first
SQL> shutdown ABORT
ORACLE instance shut down.
SQL> startup
ORACLE instance started.

Total System Global Area 1191932384 bytes
Fixed Size                   741856 bytes
Variable Size             553648128 bytes
Database Buffers          603979776 bytes
Redo Buffers               33562624 bytes
Database mounted.
Database opened.