為了安裝oracle rac我必須修改linux的主機名，然後資料庫監聽死活都啟不起來。

修改vi /etc/hosts

# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1               xionglang.mycomputer  localhost#檔案的三列分別對應IP ，主機名 ，別名。這行一定不能改

在檔案中刪除其他的行並在檔案最後新增一行 10.25.30.77             rac1 然後儲存。

修改/etc/sysconfig/network檔案

NETWORKING=yes
NETWORKING_IPV6=yes
HOSTNAME=xionglang 

修改hostname 的值，改為rac1即可。

修改好主機名後需要重啟主機使修改生效。

 我當時就這樣，然後覺得資料庫可以連線上就沒有去管了。第二天，用監聽連線時一直說沒有監聽。在伺服器上檢視lsnrctl報錯。

[[email protected] ~]$ lsnrctl status

LSNRCTL for Linux: Version 10.2.0.4.0 - Production on 24-SEP-2012 10:47:06

Copyright (c) 1991, 2007, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=rac1)(PORT=1521)))
TNS-12541: TNS:no listener
 TNS-12560: TNS:protocol adapter error
  TNS-00511: No listener
   Linux Error: 111: Connection refused
[
 
[email protected] ~]$ lsnrctl start

想了下，除了改了linux主機名，oracle監聽還沒有改呢，所以改了下listener.ora檔案

[[email protected] admin]$ vi listener.ora

# listener.ora Network Configuration File: /opt/ora10g/product/10.2.0/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = /opt/ora10g/product/10.2.0/db_1)
      (PROGRAM = extproc)
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = xionglang.mycomputer
 
)(PORT = 1521))
    )
  )

將host的值改為修改後的主機名rac1。

然後還要修改本機的配置檔案tnsnames.ora檔案

# tnsnames.ora Network Configuration File: /opt/ora10g/product/10.2.0/db_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.

ORCL =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = xionglang.mycomputer)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )

EXTPROC_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
    )
    (CONNECT_DATA =
      (SID = PLSExtProc)
      (PRESENTATION = RO)
    )
  )

~

同樣將host的值改為修改的主機名rac1.

[[email protected] admin]$ hostname
rac1

只要保證hostname的結果，listener.ora中host的值相同，監聽就可以啟動起來。

[[email protected] ~]$ lsnrctl start

LSNRCTL for Linux: Version 10.2.0.4.0 - Production on 24-SEP-2012 10:47:58

Copyright (c) 1991, 2007, Oracle.  All rights reserved.

TNS-01106: Listener using listener name LISTENER has already been started
[[email protected] ~]$ lsnrctl status

LSNRCTL for Linux: Version 10.2.0.4.0 - Production on 24-SEP-2012 10:48:05

Copyright (c) 1991, 2007, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=rac1)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 10.2.0.4.0 - Production
Start Date                24-SEP-2012 10:47:49
Uptime                    0 days 0 hr. 0 min. 16 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /opt/ora10g/product/10.2.0/db_1/network/admin/listener.ora
Listener Log File         /opt/ora10g/product/10.2.0/db_1/network/log/listener.log
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rac1)(PORT=1521)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
  Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully