[oracle@Oracle11g admin]$ cat listener.ora

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
     (GLOBAL_DBNAME = prod)
      (ORACLE_HOME = /u01/app/oracle/product/11.2.0/db_1)
      (SID_NAME = prod)
    )    ###阴影选中的是一组哦
  )