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Nagios® Core™
Version
January 15, 2019
Check for updates
When I click Check for updates I get this page that shows this text:
Nagios Update Check
Update Required
Your installation of Nagios Core <?php echo $this_version; ?> is outdated and should be upgraded. The latest version of Nagios Core is 4.4.5 was released on 2019-08-20.
Download the latest version of Nagios Core
Please take a look into this and advice what might be the problem here.
The first thing I would look at is PHP. Right now Apache doesn't seem to be running the pages through the PHP parser, and that's why you see <?php on some of the pages. I'm not sure what the Apache configuration looks like on Raspbian, but there should be a configuration file for the PHP module that tells Apache to use the PHP parser even for regular .html and .htm files.
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