title: mod_proxy_wstunnel, sudo a2enmod proxy_wstunnel does not work on centos
body: <p>Hi I am trying to install mod_proxy_wstunnel as instructed in the link <a href="http://www.amoss.me.uk/2013/06/apache-2-2-websocket-proxying-ubuntu-mod_proxy_wstunnel/" rel="nofollow">http://www.amoss.me.uk/2013/06/apache-2-2-websocket-proxying-ubuntu-mod_proxy_wstunnel/</a>, I am running Centos server. When I run the command </p>
  
  <pre><code>sudo a2enmod proxy_wstunnel
  </code></pre>
  
  <p>I get a error </p>
  
  <blockquote>
    <p>sudo: a2enmod: command not found. </p>
  </blockquote>
  
  <p>Could anyone please help me.</p>
  
  <p>Cheers
  Sunil</p>