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today I've just installed Xubuntu to my laptop. Altough I'm able to connect to internet by wireless I cannot do it by lan. I tried all the things I've found on the web (even if I don't know what they're doing at all) but still I cannot connect.

Here is the possible valuable informations from my system. I'd be really appreatiate if some of you help me:

lsb_release -a

No LSB modules are available. Distributor ID: Ubuntu

Description: Ubuntu 17.04 Release: 17.04 Codename: zesty

sudo nano /etc/network/interfaces

interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback auto lo

ifconfig -a

eno1: flags=4099 mtu 1500

    ether 34:e6:d7:80:b3:a0  txqueuelen 1000  (Ethernet)
    RX packets 0  bytes 0 (0.0 B)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 0  bytes 0 (0.0 B)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    device interrupt 20  memory 0xf7200000-f7220000  

lo: flags=73 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 1020  bytes 75402 (75.4 KB)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 1020  bytes 75402 (75.4 KB)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlp2s0: flags=4163 mtu 1500 inet 172.20.32.182 netmask 255.255.240.0 broadcast 172.20.47.255

    inet6 fe80::6548:18e7:178e:4c06  prefixlen 64  scopeid 0x20<link>
    ether 5c:e0:c5:2c:b0:7d  txqueuelen 1000  (Ethernet)
    RX packets 34326  bytes 9980591 (9.9 MB)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 7156  bytes 1335706 (1.3 MB)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
 lspci -nn |grep Ethernet

00:19.0 Ethernet controller [0200]: Intel Corporation Ethernet Connection (3) I218-LM [8086:15a2] (rev 03)

My laptop is dell latitude e5450.

  • 1
    Does Network Manager show you that you're connected to Ethernet? (Note that /etc/network/interfaces isn't used in most of the Desktop versions of *buntu because Network Manager is used instead) – Thomas Ward Jun 22 '17 at 12:31
  • @ThomasWard By network manager if you mean the symbol that is next to the speaker symbol on the top left of screen. The ethernet network button is not responsive there. I cannot click on it. – zwlayer Jun 22 '17 at 12:36
  • When you plug into the Ethernet network do you get link lights indicating activity or connection status? – Thomas Ward Jun 22 '17 at 13:08
  • No unfortunatelly, when I plug the cable nothing changes. @ThomasWard But I'm sure both cable and infastructure is working because I tested them by using another computer – zwlayer Jun 22 '17 at 13:14
  • @ThomasWard do you have any idea about my situation ? – zwlayer Jun 22 '17 at 13:36

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