[[emailprotected] ~]# su - oracle
[[emailprotected] ~]$ sqlplus ‘/as sysdba‘
SQL*Plus: Release 11.2.0.1.0 Production on Tue Apr 22 17:10:52
Copyright (c) 1982, , Oracle. All rights reserved.
ERROR:
ORA-12162: TNS:net service name is incorrectly specified
Enter user-name:
ERROR:
ORA-12162: TNS:net service name is incorrectly specified
Enter user-name:
ERROR:
ORA-12162: TNS:net service name is incorrectly specified
SP2-0157: unable to CONNECT to ORACLE after 3 attempts, exiting SQL*Plus
[[emailprotected] ~]$ export ORACLE_SID=PROD //向环境变量中添加实例名，说明需手动设置
[[emailprotected] ~]$ sqlplus ‘/as sysdba‘
SQL*Plus: Release 11.2.0.1.0 Production on Tue Apr 22 17:11:16
Copyright (c) 1982, , Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> select status,instance_name from v$instance; //登录后查询状态,正常
STATUS INSTANCE_NAME
------------ ----------------
OPENPROD
原文：/huangyanlong/article/details/27823879
