vim /etc/sysconfig/network-scripts/ifcfg-eth0
打开看一下你的配置
DEVICE=eth0
BOOTPROTO=yes
ONBOOT=yes
NETMASK=255.255.255.0
DNS2=222.85.85.85
TYPE=Ethernet
IPADDR=192.168.1.62
GATEWAY=192.168.1.1
DNS1=222.88.88.88