预备：先关闭ORACLE数据库及监听，具体方法见：http://blog.csdn.net/zxnlmj/article/details/23096877

1、修改HOSTS文件，添加JTWF到本机IP地址的映射：

[root@JTWF home]# gedit /etc/hosts

最后一行为添加的：

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
16.54.136.81 JTWF

2、修改/etc/sysconfig/network添加如下：

[root@JTWF home]# gedit /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=JTWF

3、修改listener.ora

su oracle

gedit /home/oracle/product/11.2/db_1/network/admin/listener.ora

修改HOST由HOST=localhost改为HOST=JTWF（随意）：

# listener.ora Network Configuration File: /home/oracle/product/11.2/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = JTWF)(PORT = 1521))
    )
  )

ADR_BASE_LISTENER = /home/oracle

4、tnsnames.ora文件不修改也可，我没修改

gedit /home/oracle/product/11.2/db_1/network/admin/tnsnames.ora 

# tnsnames.ora Network Configuration File: /home/oracle/product/11.2/db_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.

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