Comment by g45y45

You really want to do this if you use Spectrum Cable. You are locked out of configuring the DNS settings via their cable modems (even if you supply your own). These force a DNS search suffix that leaks all DNS requests to their server, even if you are using another public DNS. I noticed network manager kept forcing the DNS search suffix, even after I manually disabled it. I did the config change to disable it messing with the resolv.conf