登录RMAN 报ORA-12162：TNS:net service name is incorrectly specified错误

登录RMAN 报ORA-12162：TNS:net service name is incorrectly specified错误


[oracle@localhost admin]$ date
Tue Apr 22 18:06:16 CST 2014
[oracle@localhost admin]$ rman target /
//出现诡异的ora-12162错误，第一反应是TNS，但第二反应告诉我，这是个简单的错误，注意环境变量


Recovery Manager: Release 11.2.0.1.0 - Production on Tue Apr 22 18:08:11 2014


Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.


RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-00554: initialization of internal recovery manager package failed
RMAN-04005: error from target database: 
ORA-12162: TNS:net service name is incorrectly specified
[oracle@localhost admin]$ echo $ORACLE_HOME    //查看ORACLE_HOME,设置正确
/u01/app/oracle/product/11.2.0/db_1
[oracle@localhost admin]$ echo $ORACLE_SID    //查看ORACLE_SID,发现设置为空


[oracle@localhost ~]$ export ORACLE_SID=PROD   //手工注入ORACLE_SID
[oracle@localhost ~]$ rman target /             //启动RMAN,成功


Recovery Manager: Release 11.2.0.1.0 - Production on Tue Apr 22 18:13:40 2014


Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.


connected to target database: PROD (DBID=239015079)


RMAN>