ubuntu16.04 无法上网问题

命令1：手动设置IP地址/MAC/DNS服务器/网关

/etc/network/interfaces

# interfaces(5) file used by ifup(8) and ifdown(8)
#auto lo
#iface lo inet loopback
auto enp2s0
iface enp2s0 inet static
pre-up ifconfig enp2s0 hw ether XX:XX:XX:XX:XX:XX  （要改成的MAC） 
address XX.XX.XX.XX                                                    （要改成的IP） 
netmask 255.255.255.0
gateway X.X.0.1
broadcast X.X.X.255
dns-nameserver 114.114.114.114

保存后重启

sudo /etc/init.d/networking restart