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https://medium.com/@niktrix/getting-rid-of-systemd-resolved-consuming-port-53-605f0234f32f
There are cases in which you need to use port 53, like to use dnsmasq, dns server etc. which is used by systemd-resolved. to get rid of systemd-resolved safely
stop systemd-resolved “ sudo systemctl stop systemd-resolved”
edit /etc/systemd/resolved.conf with these
[Resolve]
DNS=8.8.8.8 1.1.1.1
DNSStubListener=no