设定固定 IP 地址
对 Ubuntu ，编辑 /etc/network/interfaces ，内容类似下面：
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth 0
#iface eth 0 inet dhcp
iface eth 0 inet static
address 172.16.0.46
netmask 255.255.255.0
gateway 172.16.0.254
dns-nameservers 172.16.1.101 8.8.8.8 8.8.6.6
如果需要设定多个 IP 地址，可以增加一些行，类似下面：
auto eth0:1
iface eth0:1 inet static
address x.x.x.x
netmask x.x.x.x
network x.x.x.x
broadcast x.x.x.x
gateway x.x.x.x
修改完成后，重启网络服务刷新配置：
sudo /etc/init.d/networking restart
如果要从 DHCP 服务器获取 IP 地址，请运行：
sudo dhclient eth0
# 如果要删除 DHCP ，请运行：
sudo aptitude remove dhcp3-client dhcp3-common