Typo to to

Doc/Sdi/dns.xml

@@ -237,9 +237,8 @@ $TTL    604800
 
       <para>The MI department has already set up a <xref linkend="glo_DNS"/>
       service for <code>mi.hdm-stuttgart.de</code>. But regarding upcoming
-      exercises we want to configure additional host aliases. In order to to
-      this in an independent manner you'll follow the subsequently described
-      approach:</para>
+      exercises we want to configure additional host aliases. Follow the subsequently
+      described approach to achieve this goal:</para>
 
       <itemizedlist>
         <listitem>