===== Apache mod_rewrite is not enabled =====

If you got the error "//Apache Rewrite Module :    Apache mod_rewrite is not enabled//" on the first run of the PNP4Nagios webinterface or you see errors instead of graphs, just do the following:

1. Run the followning:
<code>
a2enmod rewrite
</code>

2. Restart your apache server
<code>
/etc/init.d/apache2 restart
</code>