user@host:~$ whonixcheck [INFO] [whonixcheck] multinodo-nikki | Whonix-Workstation | whonix-ws-14 TemplateBased AppVM | Thu Nov 15 03:17:05 UTC 2018 eth0: error fetching interface information: Device not found [ERROR] [whonixcheck] check network interfaces Result: network interface eth0 not up!
If you know what you are doing, feel free to disable this check. Create a file /etc/whonix.d/50_whonixcheck_user.conf and add: whonixcheck_skip_functions+=" check_network_interfaces "