1、ubuntu系统
修改IP地址：sudo gedit /etc/network/interfaces
auto eth0
iface eth0 inet static
address 219.218.122.168
netmask 255.255.255.0
gateway 219.218.122.255
2、ubuntu系统修改DNS： sudo gedit /etc/resolv.conf
nameserver 202.194.15.12
3、使网络生效：
sudo /etc/init.d/networking restart