Starting Nagios Core Init Script: The easiest way to start the Nagios Core daemon is by using the init script like so: /etc/rc.d/init.d/nagios start Manually: You can start the Nagios daemon manually with the -d command line option like so: /usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios.cfg Restarting Nagios Core Restarting/reloading is nececessary when you modify your configuration files … Read more