Install resolvconf sudo apt install resolvconf Edit the base file with what you want to always be in the file sudo nano /etc/resolvconf/resolv.conf.d/base Have resolvconf rebuild the base sudo resolvconf -u

Here is a bash script I use to update DDNS with CloudFlare, I could use ddclient, but I like this it works for me apt -y install dnsutils jq curl #!/usr/bin/env bash # A bash script to update a Cloudflare DNS A record with the external IP of the source machine # Used to provide DDNS service for my home # Needs the DNS record pre-creating on Cloudflare ## Based on https://gist.