在 /etc/sysconfig/network-scripts/ifcfg-eth<N> 文件中加入 PEERDNS 选项。
[root@mydb etc]# vi /etc/sysconfig/network-scripts/ifcfg-eth0
# Intel Corporation 82545EM Gigabit Ethernet Controller (Copper)
DEVICE=eth0
BOOTPROTO=dhcp
HWADDR=00:0C:29:62:0B:A7
ONBOOT=yes
TYPE=Ethernet
PEERDNS=no