On Thu 03 Mar 2022 at 19:38:07 +0100, Stella Ashburne wrote: [Snip] > Did you mean to tell me that the following lines can be omitted from both /etc/network/interfaces AND /etc/network/interfaces.d/brian ? > > # The loopback network interface > auto lo > iface lo inet loopback Indeed I do. ifupdown handles the lo interface without them. -- Brian.