問題現象：安裝CentOS 5，每次啓動後網卡總不能設置成指定的靜態IP地址，eth0自動變成dhcp，不論直接修改ifcfg-eth0以及setup修改，重啓後ifcfg-eth0都會自動變回dhcp方式，而/etc/sysconfig/network-script/目錄下多出一個ifcfg-eth0.bak文件，該文件內容爲原先ifcfg-eth0內容。板載網卡的mac地址每次重啓也不一樣.
I have installed Centos 5 on a pc, now dhcp is active but i want to configure this pc with a static ip, i change this with netconfig or system-config-network command, restart network service and works fine but when i restart pc, the net configuration is reset and dhcp is active, is like centos load a default net configuration every time i reboot this pc. How can i configure a static ip and that this ip remains in centos every time i restart this pc?
現象：
具體解決辦法：
I have just recently come accross this same problem on a few machines running CentOS 5 in which you have set a static IP address and after rebooting , the system hangs on "determing IP address" and then goes on to boot without any hostname or IP address.
The way around this problem that I and one or 2 others have found is to :
1) Disable Kudzu on bootup
2) Unbind the MAC address for eth0 in /etc/sysconfig/network-scripts/ifcfg-eth0 by removing the line
HWADDR=XX:XX:XX:XX:XX:XX
You will also need to check /etc/sysconfig/network-scripts and remove any non active ethernet entries that gets placed in that directory after this bootup problem.
The typical files are
ifcfg-eth0.bak
ifcfg-eth0:0