由于debian9修改了网卡名称为enp3s0
1：修改/etc/network/interfaces
auto lo
iface lo inet loopback
auto enp3s0
iface enp3s0 inet static
address 192.168.1.111
netmask 255.255.255.0
gateway 192.168.1.1
2：修改/etc/resolv.conf
nameserver = 114.114.114.114 //DNS1
nameserver = 8.8.8.8 //DNS2
3：修改/etc/NetworkManager/NetworkManager.conf
managed = true
4：重启network
sudo systemctl restart networking.service
sudo systemctl restart network-manager
