Hi all!
I have installed Nagios, and it claims to not have any errors, based on these directions from the nagios quickstart sourceforge page. (Sorry, I can't link to it)

But, after I authenticate at localhost/nagios, I only see a blank screen. I can't figure out what I'm doing wrong!

Can someone please help me decode these httpd error logs? I had to edit them to remove the links, but the gist is there.

Thanks!

PHP Warning: require_once(/usr/local/nagios/share/includes/../config.inc.php) failed to open stream: No such file or directory in /usr/local/nagios/share/includes/utils.inc.php on line 4, referer: localhost/nagios
[Mon Jun 06 10:49:08 2011] [error] PHP Fatal error: require_once() [<a href='function.require'>function.require</a>]: Failed opening required '/usr/local/nagios/share/includes/../config.inc.php' (include_path='.:/usr/share/pear:/usr/share/php') in /usr/local/nagios/share/includes/utils.inc.php on line 4, referer:
[Mon Jun 06 10:49:08 2011] [error] [client 127.0.0.1] PHP Warning: require_once(/usr/local/nagios/share/includes/../config.inc.php) [<a href='function.require-once'>function.require-once</a>]: failed to open stream: No such file or directory in /usr/local/nagios/share/includes/utils.inc.php on line 4, referer:
[Mon Jun 06 10:49:08 2011] [error] [client 127.0.0.1] PHP Fatal error: require_once() [<a href='function.require'>function.require</a>]: Failed opening required '/usr/local/nagios/share/includes/../config.inc.php' (include_path='.:/usr/share/pear:/usr/share/php') in /usr/local/nagios/share/includes/utils.inc.php on line 4,


I should mention that I do have this file: /usr/local/nagios/share/includes/utils.inc.php

Have you ever referred Nagios official document to install and configure Nagios? because Nagios have well documented guide on their official site.

Yep... I installed directly from what the quickinstall guide told me.

Let us know your installation steps. or just move the Nagios directory and install again thoroughly following documentation.

Also check whether SE Linux is disabled.

Have you checked PHP module whether it is properly loaded in Apache?

Hello!
SE Linux is disabled.

I followed the instructions at the Nagios Sourceforge quickstart located here verbatim:
http (colon slash slash) nagios.sourceforge.net/docs/3_0/quickstart-fedora.html

My apologies, I don't know how to check that!

Okay, I got it.
After doing an updatedb, I removed ANYTHING that said Nagios, deleted users, and started from scratch again. I must have missed something last time because now it works... Sweet!

Thanks for the help!