$ apt install resolvconf
$ resolvconf -u
$ ls /etc/resolvconf/resolv.conf.d/
base head tail

head提示不可编辑，所以修改base和tail两个文件
#如果没有这个文件的手动创建

$ vim /etc/resolvconf/resolv.conf.d/base  
nameserver 8.8.8.8 

$ reboot
$ cat /etc/resolv.conf
...........
nameserver 8.8.8.8