Network/systems status monitoring daemon
nagios3 [-h] [-v] [-s] [-d] <main_config_file>
nagios3 is a daemon program that monitors the status of various network accessible systems, devices, and more. For more information, please consult the online documentation available at http://www.nagios.org, or on your nagios server's web page.
The main configuration file. On debian systems this defaults to /etc/nagios3/nagios.cfg
A helpful usage message
Reads all data in the configuration files and performs a basic verification/sanity check. Always make sure you verify your config data before (re)starting Nagios.
Shows projected/recommended check scheduling information based on the current data in the configuration files.
Starts Nagios in daemon mode (instead of as a foreground process).
Default configuration directory for nagios3