虚拟机Linux下安装oracle 10G 时，在安装过程中，到检查环境变量那一步时，Oracle提示如下信息：

Checking Network Configuration requirements ...
Actual Result: Unknown Host Exception has Occurred :redhat6: redhat6.
Check complete. The overall result of this check is: Not executed <<<<
Recommendation: Oracle supports installations on systems with DHCP-assigned public IP addresses.  However, the primary network interface on the system should be

configured with a static IP address in order for the Oracle Software to function properly.  See the Installation Guide for more details on installing the software on

systems configured with DHCP.

经过多次安装和日志排查，终于发现了问题，这个是因为/etc/hosts配置文件配置错误导致的，这个文件的IP地址对应的主机名要和这个/etc/sysconfig/network的配置文件的主机名一样才行。

例如：/etc/sysconfig/network配置文件信息如下：

NETWORKING=yes

HOSTNAME=redhat6

那么/etc/hosts配置文件的主机名就要用到redhat6，如：

192.168.1.203  redhat6

127.0.0.1  localhost

上面的IP地址是linux本机的IP地址，修改后，上面的问题就解决了。