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我无法从 SQL plus 连接到 Oracle 数据库。这是我收到的错误消息：

Status: Failure -Test failed: Listener refused the connection with the following error: ORA-12505. TNS: listener dos not currently know of SID given in connect descriptor

这是listener.ora 的配置：

# listener.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
# Generated by Oracle configuration tools.

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.104)(PORT = 1521))
    )
  )

ADR_BASE_LISTENER = /u01/app/oracle

sqlnet.ora：

# sqlnet.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/sqlnet.ora
# Generated by Oracle configuration tools.

NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)

ADR_BASE = /u01/app/oracle

tnsnames.ora：

# tnsnames.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.

ORACLE =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.104)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = oracle)
    )
  )

我该如何解决这个问题？

PS 这是命令 lsnrctl status 的输出

[oracle@localhost bin]$ ./lsnrctl status

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 08-JAN-2013 14:38:00

Copyright (c) 1991, 2009, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.1.0 - Production
Start Date                08-JAN-2013 14:37:06
Uptime                    0 days 0 hr. 0 min. 54 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
Listener Log File         /u01/app/oracle/diag/tnslsnr/localhost/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.104)(PORT=1521)))
The listener supports no services
The command completed successfully
[oracle@localhost bin]$
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