Step1)
$ sudo apt install -y resolvconf
Step2)
$ sudo vim /etc/resolvconf/resolv.conf.d/head
or
$ sudo vim /etc/resolvconf/resolv.conf.d/tail
===================================
nameserver 192.168.254.254
nameserver 10.10.10.10
nameserver 8.8.8.8
search dreamtails.local dreamtails.com
===================================
Step3)
$ sudo resolvconf -u
Step4)
$ sudo systemctl disable systemd-resolved
$ sudo systemctl stop systemd-resolved
$ sudo reboot
Step5)
$ cat /etc/resolv.conf
==================================
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.
nameserver 192.168.254.254
nameserver 10.10.10.10
nameserver 8.8.8.8
search dreamtails.local dreamtails.com
==================================