Linux Oracle启动SqlPlus无法连接

1.故障描述

今天有空在linux上安装了一台oracle测试服务器，安装完成使用sysdba登陆的时候遇到问题

[oracle@Database ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on Fri Aug 29 22:32:46 2014

Copyright (c) 1982, 2009, Oracle.  All rights reserved.

ERROR:

ORA-12162: TNS:net service name is incorrectly specified

2.故障分析

确认ORACLE_HOME和ORACLE_SID环境变量参数

[oracle@Database ~]$ echo $ORACLE_HOME

/u01/app/oracle/product/11.2.0/dbhome_1

[oracle@Database ~]$ echo $ORACLE_SID

[oracle@Database ~]$ 

ORACLE_SID无显示

3.故障解决

添加ORACLE_SID参数

[oracle@Database ~]$ export ORACLE_SID=orcl

[oracle@Database ~]$ echo $ORACLE_SID

orcl

测试连接登陆SYSDBA

[oracle@Database ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on Fri Aug 29 22:35:08 2014

Copyright (c) 1982, 2009, Oracle.  All rights reserved.

Connected to:

Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> exit