Hello everyone, My problem is that I cannot get the ethernet card on the local network to get up. I'm new to debian after many years of red-hat/fedora. The machine: HP Compaq Elite 8300 SFF (Core i5). The system: debian buster (testing) Some information: [ben@til ~]$ systemctl status networking.service networking.service - Raise network interfaces Loaded: loaded (/lib/systemd/system/networking.service; enabled; vendor preset: enabled) Active: active (exited) since Sat 2018-11-24 21:43:38 AEDT; 6min ago Docs: man:interfaces(5) Process: 460 ExecStart=/sbin/ifup -a --read-environment (code=exited, status=0/SUCCESS) Process: 452 ExecStartPre=/bin/sh -c if [ "$CONFIGURE_INTERFACES" != "no" ] && [ -n "$(ifquery --read-environ Main PID: 460 (code=exited, status=0/SUCCESS) [ben@til etc]$ ip addr <snip> 2: enp3s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000 link/ether 30:b5:c2:05:28:70 brd ff:ff:ff:ff:ff:ff 3: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 <snip> [ben@til etc]$ lspci -nnk <snip> 03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8169 PCI Gigabit Ethernet Controller [10ec:8169] (rev 10) Subsystem: Realtek Semiconductor Co., Ltd. RTL8169/8110 Family PCI Gigabit Ethernet NIC [10ec:8169] Kernel driver in use: r8169 Kernel modules: r8169 The eno1 is onboard, connected to adsl and works fine. If I restart the network with 'systemctl restart networking', or, './etc/init.d/networking restart', the network goes down and fails. The enp3s0 is connected to a switch on a local network which has two other fedora computers on it. With a previous debian box all I did to have it work on this network was write the following config, reboot, and it worked. I was guided by https://www.debian.org/doc/manuals/debian-reference/ch05. That old box went bung, so I acquired the current one and tried the same config, with the appropriate name changes. That config is in /etc/interfaces (which I created on this machine): -------start config----- # 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 eno1 iface eno1 inet dhcp # This is an autoconfigured IPv6 interface iface eno1 inet6 auto # local net allow-hotplug enp3s0 iface enp3s0 inet static address 192.168.0.3 netmask 255.255.255.0 -----------end config----------- There is no /etc/network/interfaces.d/ on this machine. And this particular ethernet card is the same one that worked in previous debian box. Here are the commands I've used, but none has succeeded in getting the card up, though the ip address was assigned and shown in the 'ip addr' output. There were no error messages other than "FAILED" in the systemctl status output. ip addr add 192.168.0.3 dev enp3s0 ip addr add 192.168.0.3/24 dev enp3s0 ip link set enp3s0 up /etc/init.d/networking restart I was hoping for some help to let me know what I need to do to get this ethernet working? ben