vim /u01/app/oracle/product/12.1.0/dbhome_1/network/admin/listener.ora

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (GLOBAL_DBNAME = orcl) #数据实例名 show parameter name
      (ORACLE_HOME = /u01/app/oracle/product/12.1.0/dbhome_1) # echo $ORACLE_HOME
      (SID_NAME = orcl) # show parameter name
    )
  )

lsnrctl stop
lsnrctl start 
lsnrctl status