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oracle@localhost admin]$ rman target /
Recovery Manager: Release 11.2.0.4.0 - Production on Tue Apr 22 18:08:11 2018
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=orcl //手工注入ORACLE_SID
[oracle@localhost ~]$ rman target / //启动RMAN,成功
Recovery Manager: Release 11.2.0.4.0 - Production on Tue Apr 22 18:13:40 2018
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved
connected to target database: PROD (DBID=239015079)
RMAN>
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来源：oschina
链接：https://my.oschina.net/u/3635497/blog/3146740