You can still edit /etc/resolv.conf. If it has a "Do not edit" comment in it, it's probably a symlink to some file that's dynamically managed (most likely to au

You can still edit /etc/resolv.conf. If it has a "Do not edit" comment in it, it's probably a symlink to some file that's dynamically managed (most likely to automatically use or fallback to the DNS server advertised on the network, as needed for e.g. captive portals). Just replace the symlink with a text file with your prefered DNS server in there.