安装redtat 5.5 oracle10g 完成，创建数据库最后一步报错，熟悉oracle的烦请帮忙解答一下，谢谢各位！

Question

database connection through listener failed. Fix the error and run EM Configuration Assistant again.
Some of the possible reasons may be:
1)Listener port 1521 provided is incorrect. Provide the correct port.
2)Listener is not up. Start the Listener.
3)Database service orcl is not registered with listener. Register the database service.
4)Listener is up on physical host and ORACLE_HOSTNAME environment variable is set to virtual host. Unset ORACLE_HOSTNAME environment variable.
5)Listener is up on virtual host. Set environment variable ORACEL_HOSTNAME=<VIRTUAL HOST>.
6)/etc/hosts does not have correct entry for hostname.
Refer to the log file at /uo1/app/oracle/10.2.0/db_1/cfgtoollogs/dbca/orcl/emConfig.log for more details.
You can retry configuring this database with Enterprise Manager later by manually running /u01/app/oracle/10.2.0/db_1/bin/emca script.

Answer 1

监听、实例都没配置本回答被提问者采纳

Answer 2

6点原因已经一一列出，你仔细逐个检查噻

Answer 3

你启动服务了吗？

Answer 4

你好，虽然时间过去很久了，但是小弟我也遇到同样的问题，不知道你是怎么解决的能否告知，谢谢。