What is the difference between UNIX Access, Modify, and Change Times?

This is a silly little thing that I consistently forget … or at least forget some of the subtle differences between these three measures.
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This is one miserable problem with a very simple solution. It has to do with multiple python interpreters in mod_python v.3.2.8 and multiple virtual hosts. To remedy the situation, add the following line inside your <VirtualHost> declaration in your apache conf file:

PythonInterpreter main_interpreter

Restart server and all will be better. For more info see trac ticket #3455

UPDATE: All is not well in the world of mod_python and trac.  The above solution does improve matters but there are still issues.  Many are suggesting to use mod_wsgi with trac to manage multiple sites on virtual hosts.  Is this the beginning of the end of mod_python?

It is possible to have more than one trac site on one host.  This article explains how to accomplish this using apache, mod_python, and trac on a Red Hat based system (although the principles easily translate to Ubuntu based systems) so that each of your sites has an address like trac.example.com.

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