No DNS server set when using DHCP

[jim0020]

Just using Armbian for the first time on a Le Potato.  Added a USB WiFi dongle, configured it using /etc/network/interfaces.d/<wifi device id>, and /etc/wpa_supplicant/wpa_supplicant.conf.

 

My problems is the DNS server doesn't seem to be set correctly:

$ nslookup github.com
;; communications error to 127.0.0.1#53: connection refused

 

But:

$ nslookup -q=all github.com 8.8.8.8
unknown query type: all
Server:		8.8.8.8
Address:	8.8.8.8#53

Non-authoritative answer:
Name:	github.com
Address: 140.82.112.4

 

How do I fix this to use the DNS provided by my router using DHCP?

 

My /etc/network/interfaces.d/<wifi device id> file looks like this:

auto wlx60fb006397a1
allow-hotplug wlx60fb006397a1
iface wlx60fb006397a1 inet dhcp

pre-up sudo wpa_supplicant -B -iwlx60fb006397a1 -c/etc/wpa_supplicant/wpa_supplicant.conf
post-down sudo killall -q wpa_supplicant

 

And my /etc/wpa_supplicant/wpa_supplicant.conf file looks like this:

ap_scan=1 
ctrl_interface=DIR=/var/run/wpa_supplicant

network={
	ssid="<my wifi ssid>"
	scan_ssid=1
	psk="<my wifi password>"
}

 

 

Thanks!

 

[Werner]

You could go old fashion way and disable systemd-resolvd and set your dns server manually in /etc/resolv.conf

 

[quackmore]

or give nmcli a try

 

https://www.baeldung.com/linux/network-manager

 

or using nmtui you can check you connection and verify that the option 'ignore-auto-dns' is not checked 

 

https://linuxhint.com/network-configuration-debian/

 

[jim0020]

Here's what I ended up doing.  dhclient seemed to do the trick.  I did add 8.8.8.8 and 8.8.4.4 to resolv.conf as a backup.

 

pkill dhclient
pkill wpa_supplicant
sudo ip link set dev wlx60fb006397a1 down
addr flush dev wlx60fb006397a1
ip addr flush dev wlx60fb006397a1
ip link set dev Tr8Bt7LY_BsN_w up
ip link set dev wlx60fb006397a1 up
wpa_supplicant -B -i wlx60fb006397a1 -Dnl80211 -c /etc/wpa_supplicant/wpa_supplicant.conf 
dhclient -v wlx60fb006397a1
ip route show