I've installed Kubuntu 18.04 on a desktop with an ethernet connection. During the installation, updates were downloaded and the internet was working fine. Once the operating system is installed, every time I try to ping any website I get the following error:

Temporary failure in name resolution

I've tried the ethernet cable on different computers and it works, so I don't know what I should do next.


There are different possible reasons for a failure in name resolution.

  1. You don't have any internet connectivity. Try

    ping -c4

    If you get answers, then your internet connection works. Else find out why it doesn't

  2. You have the wrong resolver. Type

    cat /etc/resolv.conf

    You should see at least one line

    nameserver a.b.c.d

    The a.b.c.d is typically the address of your router. If there is no such line, add one. If there is such a line, but it doesn't work, of if you don't know the address of your router, try nameserver This uses the Google DNS servers at

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