1. svn co http://dev.zenoss.org/svn/trunk/zendocs/DevGuide

   1. Check out a copy of the devguide to your local machine curr directory
   2. Basically this makes a copy of the files locally, in addition to the special .svn dir
   3. co - Check Out

2. svn diff
   svn status
   svn update

http://nickyeates.com/technology/zenoss/howtos/convert_docbook_xml_to_pdf