'>dpkg</span> will present a message
        something like this:</p>
    
    <pre class='tty'>Configuration file `/etc/weewx/weewx.conf'
  ==&gt; Modified (by you or by a script) since installation.
  ==&gt; Package distributor has shipped an updated version.
  What would you like to do about it ?  Your options are:
            Y or I  : install the package maintainer's version
            N or O  : keep your currently-installed version
              D     : show the differences between the versions
     