ubuntu16将网卡名ens3改回eth0

 sed  -i 's#GRUB_CMDLINE_LINUX=""#GRUB_CMDLINE_LINUX="net.ifnames=0 biosdevname=0"#g' /etc/default/grub  
 sudo grub-mkconfig -o /boot/grub/grub.cfg  

更新网卡配置/etc/network/interfaces

然后重启生效.