启动oracle in linux

root用户登录后，输入以下命令
[root@dg1 ~]# su - oracle
[oracle@dg1 ~]$ sqlplus /nolog

SQL*Plus: Release 10.2.0.1.0 - Production on Mon May 11 12:51:24 2009

Copyright (c) 1982, 2005, Oracle. All rights reserved.

SQL> conn / as sysdba
Connected to an idle instance.
SQL> startup
ORACLE instance started.