"code">/etc/apt/sources.list.d/weewx.list</span>, then
            upgrade to the latest version like this:</p>

        <pre class='tty cmd'>sudo apt-get update
sudo apt-get install weewx</pre>

        <p>Otherwise, download the latest X.Y.Z DEB package from the 
        <a href="http://weewx.com/downloads/">Download page</a> on weewx.com,
        then upgrade like this:</p>

        <pre class='tty cmd'>sudo dpkg -i weewx_X.Y.Z-R.deb</pre>

        <p>The upgrade process will not modify the weeWX databas