title: Google PageSpeed - Setting an expiry date
body: <p>I'm using a CentOS 5 32bit and I've just scanned my site on Google for page speed and it gave me the following:</p>
  
  <p>"Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network."</p>
  
  <p>Can someone please let me know how can I enable this within my Apache server?</p>