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

看下端口是否正确，还有就是环境是不是还差点什么东西本回答被提问者采纳

Answer 2

监听端口打开了？