Environment variable ORACLE_UNQNAME not defined.Please set ORACLE_UNQNAME to database unique name.

cmd----->emctl status dbconsole 报错：Environment variable ORACLE_UNQNAME not defined.Please set ORACLE_UNQNAME to database unique name.

解决方法;

select instance_name,host_name from v$instance;　　　#假设实例名：aaa ,主机名:bbb

set ORALCE_UNQNAME=aaa

emctl status dbconsole

如果再报的错误是：OC4J Configuration issue.

set ORACLE_HOSTNAME=bbb

问题解决！