Krdytkyu

I installed Ubuntu (server) onto a computer and during the setup I connected it to my wifi and it works fine. However I am trying to move it to a wired connection and it doesn't seem to recognize the connection.

sudo netplan -debug generate does not return any errors.

I know that the connection should work. It works when connected to my laptop and the light on the ethernet port on the back of the computer flashes when the computer is booting but then turns off when it finishes booting.

lshw returns:

 *-network DISABLED

            description: Ethernet interface

            product: 88E8056 PCI-E Gigabit Ethernet Controller

            vendor: Marvell Technology Group Ltd.

            physical id: 0

            bus info: pci@0000:02:00.0

            logical name: ens33

            version: 14

            serial: 00:21:97:0f:26:21

            capacity: 1Gbit/s

            width: 64 bits

            clock: 33MHz

            capabilities: bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation

            configuration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.30 latency=0 link=no multicast=yes port=twisted pair

            resources: irq:26 memory:feafc000-feafffff ioport:e800(size=256) memory:feac0000-feadffff

ifconfig returns:

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 1716  bytes 215593 (215.5 KB)

    RX errors 0  dropped 0  overruns 0  frame 0

    TX packets 1716  bytes 215593 (215.5 KB)

    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0 

wlp3s1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500

    inet 192.168.1.33  netmask 255.255.255.0  broadcast 192.168.1.255

    inet6 fe80::215:e9ff:fe4c:261  prefixlen 64  scopeid 0x20<link>

    ether 00:15:e9:4c:02:61  txqueuelen 1000  (Ethernet)

    RX packets 13520  bytes 4311598 (4.3 MB)

    RX errors 0  dropped 998  overruns 0  frame 0

    TX packets 8205  bytes 5869540 (5.8 MB)

    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

ip route:

default via 192.168.1.1 dev wlp3s1 proto dhcp src 192.168.1.33 metric 600

192.168.1.0/24 dev wlp3s1 proto kernel scope link src 192.168.1.33

192.168.1.1 dev wlp3s1 proto dhcp scope link src 192.168.1.33 metric 600

cat /etc/netplan/*.yaml:

# This file describes the network interfaces available on your system

# For more information, see netplan(5).

network:

version: 2 <--indentation in entire script is incorrect

renderer: networkd

wifis:

  wlp3s1:

     dhcp4: yes

     access-points:

       3MightyMen:                                                                                      

          password: 3346993030

ethernets:

  en33:  <--wrong, should be ens33:

    dhcp3: true <--wrong, should be dhcp4:

Your /etc/neplan .yaml file should look something like this... this will enable your ethernet device...

network:

  version: 2

  renderer: networkd

    wifis:

      wlp3s1:

        dhcp4: yes

        dhcp6: no

        access-points:

          "3MightyMen":                                                                                      

          password: "3346993030"

    ethernets:

      ens33:

        dhcp4: yes

        dhcp6: no

# for a fixed IP, comment out the above line, (dhcp4: true),

# and uncomment addresses: and gateway4: lines below.

# to specify DNS nameservers, uncomment last three lines.

#       addresses: [192.168.1.20/24]

#       gateway4: 192.168.1.1

#       nameservers:

#         search: [mydomain, otherdomain]

#         addresses: [192.168.1.1, 1.1.1.1]

In terminal...

sudo netplan -debug generate # generate config files

sudo netplan apply # apply current configuration

reboot # reboot and confirm proper network operation

postnote: see https://netplan.io/examples for more examples