Note: This reply is addressed specifically to Brian. Mon cheri
> Sent: Thursday, March 03, 2022 at 1:59 AM > From: "Brian" <a...@cityscape.co.uk> > To: debian-user@lists.debian.org > Subject: Re: What should I put inside the file called wlan0? > > > (Nothing to do with your question but these two lines are superfluous: > > auto lo > iface lo inet loopback). > > -- > Brian. > I just remembered I should seek more clarification about your above remark. The contents of my /etc/network/interfaces file are: # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). source /etc/network/interfaces.d/* # The loopback network interface auto lo iface lo inet loopback # The primary network interface allow-hotplug enp2s0 iface enp6s0 inet static address 192.168.1.77/24 gateway 192.168.1.1 # dns-* options are implemented by the resolvconf package, if installed dns-nameservers 1.1.1.1 8.8.8.8 while in /etc/network/interfaces.d/brian they are: # The loopback network interface auto lo iface lo inet loopback # The primary network interface allow-hotplug wlp7s0 iface wlp7s0 inet static wpa-ssid JupiterRising wpa-psk (a long string of alphanumeric characters) address 192.168.1.99/24 gateway 192.168.1.1 # dns-* options are implemented by the resolvconf package, if installed dns-nameservers 1.1.1.1 8.8.8.8 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 Best wishes. Stella