I am a bit confused as to where my network settings are configured. I am using 18.04, and /etc/network/interfaces says:
# ifupdown has been replaced by netplan(5) on this system. See # /etc/netplan for current configuration. # To re-enable ifupdown on this system, you can run: # sudo apt install ifupdown
But /etc/netplan is an empty directory, with nothing in it. Any advice?