![]() You’ll use the first server to run Nagios, and the second server will be configured as a remote host that Nagios can monitor. Two Ubuntu 16.04 servers with private networking configured, set up by following the Ubuntu 16.04 initial server setup guide, including a sudo non-root user and a firewall.To complete this tutorial, you will need the following: You’ll also set up the Nagios Remote Plugin Executor (NRPE), which runs as an agent on remote hosts so you can monitor their resources. ![]() In this tutorial, you’ll install Nagios 4 and configure it so you can monitor host resources via Nagios’ web interface. Using a monitoring system like Nagios is an essential tool for any production environment, because by monitoring uptime, CPU usage, or disk space, you can head off problems before they occur, or before your users call you. It keeps an inventory of your servers and monitors them so you know your critical services are up and running. ![]() Nagios is a popular open-source monitoring system.
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