oracle 监听启动报错：the listener supports no services
问题原因：数据库实例没有注册到监听
解决办法：
找到listener.ora文件：***/product/11.2.0/dbhome_1/network/admin/目录下
增加：
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(ORACLE_HOME = /data/oracle/app/oracle/product/11.2.0/dbhome_1)
(SID_NAME = orcl)
)
)
然后重新启动监听 ok