Ubuntu的网络参数保存在文件 /etc/network/interfaces中，默认设置使用dhcp，内容如下：
# The primary network interface
auto eth0
iface eth0 inet dhcp
设置静态ip的方法如下：
(1)编辑 /etc/network/interfaces
1.1)将dhcp 一行屏蔽
# The primary network interface
auto eth0
#iface eth0 inet dhcp
1.2)添加和静态ip有关的参数
# The primary network interface
iface eth0 inet static
address 192.168.0.10
netmask 255.255.255.0
gateway 192.168.0.1
(2)编辑 /etc/resolv.conf，设置dns
nameserver 202.96.134.133
nameserver 202.106.0.20
(3)执行下面两个命令，启用新设置
$sudo ifdown eth0
$sudo ifup eth0
