On Thu, Mar 27, 2025 at 13:58:49 +0000, Andy Smith wrote: > I think all DHCP clients in Debian have a "Recomends" relationship on > resolvconf to do this modification for them. hobbit:~$ apt-cache show isc-dhcp-client | grep -e Recommends -e resolv Recommends: isc-dhcp-common Suggests: resolvconf, avahi-autoipd, isc-dhcp-client-ddns Also, I think the OP in this thread isn't even running Debian. So, who knows what their installer did?