If you want to run OpenNMS in a more sophisticated environment with Newts and/or Minions, have a look into our more detailed Installation Guide.
OpenNMS users tend to have a broad network monitoring skill set. This User Guide contains an overview of concepts and explains how to use OpenNMS for day-to-day monitoring.
The Administrator Guide builds upon the foundation of the User Guide and explains how to use OpenNMS features and configurations to monitor services and applications.
Developers enhance and send patches to improve the OpenNMS platform. They can also contribute by submitting bug fixes or building new features like new collectors and monitors.
With the large variety of devices and applications you can monitor with OpenNMS, the Wiki provides space to share experience with How Tos and Tutorials to address specific use cases.