Nagios

Nagios Core is an open-source IT infrastructure monitoring system that provides real-time visibility into servers, networks, services, and applications. It helps administrators detect issues early through detailed performance metrics and flexible alerting mechanisms, ensuring high availability and reliability of critical systems.

Features of Nagios Core:

• Real-time monitoring of hosts, services, and network devices.
• Customizable alerts with support for email and external notification systems.
• Extensible plugin-based architecture for adding custom checks.
• Web-based dashboard to visualize host and service status.
• Lightweight and scalable design suitable for enterprise and cloud deployments.
• Integration support for NRPE, NSClient++, and distributed monitoring setups.

NagIOS Usage:

$ sudo su
$ cd /opt/nagios
$ sudo systemctl enable nagios-docker
$ Start Nagios: sudo systemctl start nagios-docker
$ Check container: docker ps -a
$ For credentials, run: cat /var/nagios/credentials.txt
$ Access NagIOS in your browser at: http://your-server-ip
    

Disclaimer:
Nagios Core is an open-source project licensed under the GNU General Public License (GPL). We are not affiliated with or endorsed by Nagios Enterprises. The software is provided “as is,” without warranties. Users are responsible for configuring alerts, securing access, and maintaining their Nagios installation according to best practices.