修改ip：

vi /etc/network/interfaces

auto eth0

iface eth0 inet static

address 192.168.1.120

netmask 255.255.255.0

gateway 192.168.1.1

修改dns：

vi /etc/resolvconf/resolv.conf.d/base (长期)

vi /etc/resolv.conf (临时)

nameserver 114.114.114.114

摘：http://blog.sina.com.cn/s/blog_67be3b450101de44.html

# The loopback network interface

auto lo

iface lo inet loopback

# The primary network interface

auto eth0

iface eth0 inet static

address xxx.xxx.xxx.xxx

netmask xxx.xxx.xxx.xxx

gateway xxx.xxx.xxx.xxx

auto eth0:0

iface eth0:0 inet static

address xxx.xxx.xxx.xxx

netmask xxx.xxx.xxx.xxx

#dns-nameservers 202.102.224.68 202.102.227.68

up route add -net xxx.xxx.xxx.xxx netmask xxx.xxx.xxx.xxx gw xxx.xxx.xxx.xxx eth0

up route add -net xxx.xxx.xxx.xxx netmask xxx.xxx.xxx.xxx gw xxx.xxx.xxx.xxx eth0

up route add -net xxx.xxx.xxx.xxx netmask xxx.xxx.xxx.xxx gw xxx.xxx.xxx.xxx eth0