Krdytkyu

I just installed Xubuntu on a old machine and I can't connect to internet via Ethernet.

When I do ifconfig I get

family@PC:~$ ifconfig

enp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500

        ether 00:18:f3:04:ef:6a  txqueuelen 1000  (Ethernet)

        RX packets 97  bytes 8206 (8.2 KB)

        RX errors 0  dropped 0  overruns 0  frame 0

        TX packets 570  bytes 92342 (92.3 KB)

        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0



lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536

        inet 127.0.0.1  netmask 255.0.0.0

        inet6 ::1  prefixlen 128  scopeid 0x10<host>

        loop  txqueuelen 1000  (Local Loopback)

        RX packets 3936  bytes 238179 (238.1 KB)

        RX errors 0  dropped 0  overruns 0  frame 0

        TX packets 3936  bytes 238179 (238.1 KB)

        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

family@PC:~$ dmesg | grep "eth0"

[    2.486036] r8169 0000:02:00.0 eth0: RTL8168b/8111b at 0x(ptrval), 00:18:f3:04:ef:6a, XID 18000000 IRQ 24

[    2.486039] r8169 0000:02:00.0 eth0: jumbo features [frames: 4080 bytes, tx checksumming: ko]

[    2.592180] r8169 0000:02:00.0 enp2s0: renamed from eth0

I manually assigned an IP, now when I look at the IP router it looks like this:

family@PC:~$ ip route

169.254.0.0/16 dev enp2s0 scope link metric 1000 

192.168.1.0/24 dev enp2s0 proto kernel scope link src 192.168.1.126 metric 100

family@PC:~$ ifconfig

enp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500

        inet 192.168.1.126  netmask 255.255.255.0  broadcast 192.168.1.255

        inet6 fe80::218:f3ff:fe04:ef6a  prefixlen 64  scopeid 0x20<link>

        ether 00:18:f3:04:ef:6a  txqueuelen 1000  (Ethernet)

        RX packets 61  bytes 5126 (5.1 KB)

        RX errors 0  dropped 0  overruns 0  frame 0

        TX packets 396  bytes 49693 (49.6 KB)

        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0



lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536

        inet 127.0.0.1  netmask 255.0.0.0

        inet6 ::1  prefixlen 128  scopeid 0x10<host>

        loop  txqueuelen 1000  (Local Loopback)

        RX packets 3699  bytes 230145 (230.1 KB)

        RX errors 0  dropped 0  overruns 0  frame 0

        TX packets 3699  bytes 230145 (230.1 KB)

        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

family@PC:~$ sudo lshw -C network

[sudo] password for family: 

  *-network                 

       description: Ethernet interface

       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller

       vendor: Realtek Semiconductor Co., Ltd.

       physical id: 0

       bus info: pci@0000:02:00.0

       logical name: enp2s0

       version: 01

       serial: 00:18:f3:04:ef:6a

       size: 1Gbit/s

       capacity: 1Gbit/s

       width: 64 bits

       clock: 33MHz

       capabilities: pm vpd msi pciexpress bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation

       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full ip=192.168.1.126 latency=0 link=yes multicast=yes port=MII speed=1Gbit/s

       resources: irq:24 ioport:a800(size=256) memory:ff7ff000-ff7fffff memory:ff7c0000-ff7dffff

  *-network

       description: Network controller

       product: BCM4318 [AirForce One 54g] 802.11g Wireless LAN Controller

       vendor: Broadcom Limited

       physical id: 4

       bus info: pci@0000:05:04.0

       version: 02

       width: 32 bits

       clock: 33MHz

       capabilities: bus_master

       configuration: driver=b43-pci-bridge latency=64

       resources: irq:17 memory:ff9fc000-ff9fdfff

family@PC:~$ ping 8.8.8.8

connect: Network is unreachable

family@PC:~$ host www.ebay.com

Host www.ebay.com not found: 2(SERVFAIL)

What should I do?

Looks like your computer knows you HAVE an interface, but isn't able to connect to your network. You can see that ifconfig has transmit and received some frames

RX packets 97 bytes 8206 (8.2 KB)

TX packets 570 bytes 92342 (92.3 KB)

So the transmission medium (your Ethernet cabling) is working and there are devices on the other side, but your PC might not be receiving an IP address from your DHCP server. A few things to try include:

1. Turn on DHCP. You can do this graphically by navigating to your Ethernet settings; depending on distro/release you should be presented with the option to obtain an IP address automatically. Or from the CLI, run:

sudo ifconfig enp2s0 down

sudo dhclient enp2s0

sudo ifconfig enp2s0 up

If it says something like "File Exists", that means it was already enabled.

2. Check your router/DHCP Server. Typically on a home network these are one in the same device. First step is to reboot it; if that fails you'll need to log in to its web interface and check that DHCP is enabled and that your client list isn't full, or your PC isn't somehow excluded.




3. Statically assign an IP address. Depending on what your network's addressing scheme is, you can manually assign an IP address with sudo ifconfig enp2s0 192.168.1.x 255.255.255.0. replace the first 3 sets of numbers in 192.168.1.x to match your network. For example, if your router has an IP address of 192.168.25.1, make your PC something like 192.168.25.30 (just make sure the address isn't already taken by another device on your network).

So you might as well kill me but the solution to my problem was really simple I had simply connected the ethernet cable to an STB port... Once I had this sort out all I had to do was run

sudo systemctl restart NetworkManager

restart my PC and everything was good to go. Thanks those who helped!