oracle listener.ora tnsnames.ora sqlnet.ora 问题

Question

oracle的服务端是装在linux上的，在本地window下装了oracle客户端和plsql,
今天用plsql登录报错说：
listener does not currently know of service requested in connect descriptor现在不是很清楚，客户端的这３个问题与服务端的这３个文件需要怎么样的对应关系。

Answer 1

现在在linux服务端也出现这个错误。这个是在服务端的内容
tnsnames.ora
－－－－
truth=(DESCRIPTION=(ADDRESS=(HOST=core.company.com)(PORT=1521)(PROTOCOL=tcp))(CO
NNECT_DATA=(SERVICE_NAME=truth)))
－－－－
listener.ora
------
LISTENER =
 (ADDRESS_LIST=
        (ADDRESS=(PROTOCOL=tcp)(HOST=core.company.com)(PORT=1521))
        (ADDRESS=(PROTOCOL=ipc)(KEY=PNPKEY)))SID_LIST_LISTENER=
  (SID_LIST=
    (SID_DESC=
       (SID_NAME=truth)
       (ORACLE_HOME=/u01/app/oracle/product/10.2.0/db_1)
    )
  )

Answer 2

在服务端LSNRCTL> status
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 10.2.0.2.0 - Production
Start Date                09-NOV-2008 16:30:22
Uptime                    0 days 0 hr. 27 min. 15 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Log File         /u01/app/oracle/product/10.2.0/db_1/network/log/listener.log
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=core.company.com)(PORT=1521)))
The listener supports no services
The command completed successfully

Answer 3

你在服务器端不加连接串登陆进去，比如：sqlplus / as sysdba
然后：alter system register;

Answer 4

LSNRCTL> stop
LSNRCTL> start
LSNRCTL> status 
结果还是一样的呢

Answer 5

用　sqlplus /as sysdba登录，然后执行alter system register后
lsnrctl>status是LSNRCTL> status
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 10.2.0.2.0 - Production
Start Date                09-NOV-2008 22:30:51
Uptime                    0 days 0 hr. 3 min. 33 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Log File         /u01/app/oracle/product/10.2.0/db_1/network/log/listener.log
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=core.company.com)(PORT=1521)))
Services Summary...
Service "cmdb.opsware.com" has 1 instance(s).
  Instance "cmdb", status READY, has 1 handler(s) for this service...
Service "cmdb_XPT.opsware.com" has 1 instance(s).
  Instance "cmdb", status READY, has 1 handler(s) for this service...
The command completed successfully但当我stop,再start后，还是说The listener supports no services