Name resolution with unqualified names

Karl Auer kauer at biplane.com.au
Mon Nov 27 21:31:21 UTC 2017


On Mon, 2017-11-27 at 12:57 -0800, Kevin O'Gorman wrote:
> I have four desktops connected to the same switch, all
> running Ubuntu or Xubuntu 16.04 LTS, pretty much the same way and
> getting their IPs from the router through the switch.  So why do just
> two of them have 127.0.1.1 listed as its name resolver, and the
> others list the IP of the router?

Systems running dnsmasq will have a local loopback address as their
nameserver. Systems not running dnsmasq will generally have either
nothing, or whatever nameserver address they received via DHCP.

There are other possibilities, but for out of the box systems that's
the most likely difference, especially if you were declining stuff
during the installs. It would have been easy to decline dnsmasq.

Check in the process table for each server to see whether it is running
dnsmasq:

   ps ax | grep dnsmasq

Not sure about the DNS names you are able to use for gog and magog, but
that is a secondary investigation...

Regards, K.

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Karl Auer (kauer at biplane.com.au)
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