SystemD-NetworkD transition

Switch over to systemd-networkd for general networking

Follow the Quick Step instructions

Below instructions from this website

# deinstall classic networking
pi@raspberrypi:~ $ sudo -Es   # if not already done
root@raspberrypi:~ # systemctl daemon-reload
root@raspberrypi:~ # systemctl disable --now ifupdown dhcpcd dhcpcd5 isc-dhcp-client isc-dhcp-common rsyslog
root@raspberrypi:~ # apt --autoremove purge ifupdown dhcpcd dhcpcd5 isc-dhcp-client isc-dhcp-common rsyslog
root@raspberrypi:~ # rm -r /etc/network /etc/dhcp

# setup/enable systemd-resolved and systemd-networkd
root@raspberrypi:~ # systemctl disable --now avahi-daemon libnss-mdns
root@raspberrypi:~ # apt --autoremove purge avahi-daemon
root@raspberrypi:~ # apt install libnss-resolve
root@raspberrypi:~ # ln -sf /run/systemd/resolve/stub-resolv.conf /etc/resolv.conf
root@raspberrypi:~ # apt-mark hold avahi-daemon dhcpcd dhcpcd5 ifupdown isc-dhcp-client isc-dhcp-common libnss-mdns openresolv raspberrypi-net-mods rsyslog
root@raspberrypi:~ # systemctl enable systemd-networkd.service systemd-resolved.service
root@raspberrypi:~ # exit
pi@raspberrypi:~ $