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Nagios

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description Nagios Overview

Nagios is an open-source monitoring software application that allows administrators to monitor the availability, performance, and health of their servers, networks, applications, and services through automated checks and alerts.

help Nagios FAQ

What is the difference between Nagios Core and Nagios XI?

Nagios Core is the free, open-source monitoring engine that relies heavily on command-line configuration and text files. Nagios XI is the commercial, proprietary version that provides a comprehensive web-based interface, advanced reporting, and a setup wizard.

How does Nagios monitor remote Linux servers?

Nagios typically uses the NRPE (Nagios Remote Plugin Executor) add-on to monitor remote Linux servers. This allows the central Nagios server to execute local monitoring scripts on the remote machine and retrieve the results for processing.

Can Nagios monitor network bandwidth and switches?

Yes, Nagios can monitor network switches and bandwidth usage by utilizing the SNMP (Simple Network Management Protocol). By configuring SNMP checks, it can track port status, traffic volume, and overall network device health.

Does Nagios support sending SMS alerts for critical outages?

Yes, Nagios allows you to configure custom notification commands to send alerts via SMS, email, or instant messaging. This is usually achieved by integrating Nagios with third-party SMS gateway services like Twilio or Clickatell.

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