(Nagios is a widely used host and service monitoring tool, which is used by many system administrators to monitor the system. In order to facilitate users' reading and operation, this article will introduce the basic installation guide of Nagios to help users with simple installation. The contents of the installation guide include how to install Nagios and some extensions, and how to integrate Nagios and its extensions. During the installation process, users will need to make several modifications to the installation, which will help to better understand the system operation and the integration of the system and different services. In addition, this article will also explain the monitoring of some special services and their configurations. It is believed that after reading the full text, users' Nagios installation ability can be improved.)