Overview Icinga is an open-source infrastructure monitoring system that started as a fork of Nagios but has evolved into a powerful, modern solution with a distributed architecture. It is designed to monitor complex IT infrastructures across multiple data centers, providing real-time visibility into the health and performance of servers, networks, applications, and cloud services. Unlike […]

Cabot is a self-hosted, open-source monitoring and alerting service that provides a lightweight alternative to commercial tools like PagerDuty. Built with Python and Django, Cabot monitors your websites, services, and infrastructure, sending instant alerts when something goes wrong. With over 5,600 GitHub stars, it is a popular choice for teams that want a simple, self-hosted […]

Checkmk is a comprehensive open-source IT infrastructure monitoring system that bridges the gap between legacy on-premises environments and modern cloud-native architectures. Developed in Python and C++, Checkmk originated as an extension to Nagios and has grown into a full-featured monitoring platform with automated discovery, intelligent alerting, and a unified observability approach for cloud, on-premises, and […]

Zabbix is an enterprise-class open-source observability platform for real-time monitoring of IT components and services, including networks, servers, virtual machines, applications, and cloud infrastructure. With over 6,000 GitHub stars and millions of downloads annually, Zabbix provides a complete monitoring solution with auto-discovery, alerting, visualization, and distributed monitoring capabilities in a single integrated package. Key Features […]

Nagios Core is the industry-standard open-source monitoring engine that revolutionized IT infrastructure monitoring. For over 25 years, Nagios has been the trusted choice for monitoring servers, networks, applications, and services, serving over one million users worldwide. Its plugin-based architecture and extensive community ecosystem make it one of the most versatile monitoring platforms available. Key Features […]

Icinga is an open-source network monitoring system that checks the availability of network resources, notifies users of outages, and generates performance data for reporting. Originally forked from Nagios in 2009, Icinga has evolved into a modern monitoring platform with a powerful configuration language and a REST API, making it highly scalable and flexible for enterprises […]

lnstat is a unified Linux network statistics tool that periodically displays statistical values exported by the kernel. A feature-complete replacement for the old rtstat program, lnstat reads from /proc/net/stat/ files to present routing cache statistics, neighbour table cache, and other kernel-level network metrics in a configurable, human-readable format. It is part of the iproute2 package, […]

top is the classic process viewer and system monitoring utility found on virtually every Unix-like operating system. It provides a real-time, full-screen view of running processes, system resource usage, and uptime information. As the oldest and most widely deployed system monitor, top is the standard tool that administrators reach for when a system feels slow […]

iptraf-ng is an enhanced version of the original IPTraf network monitoring tool, providing a full-screen, menu-driven console interface for monitoring network traffic, TCP/UDP connections, and packet statistics. It offers detailed breakdowns by protocol, port, and interface, making it a comprehensive tool for network diagnostics and traffic analysis from the terminal. Key Features Traffic monitoring — […]

nload is a real-time console network bandwidth monitoring tool that visualises inbound and outbound traffic on network interfaces. It provides two interactive graphs — one for incoming traffic and one for outgoing — with a clear numerical display of current, average, minimum, and maximum bandwidth rates. Its simple, focused interface makes it ideal for quickly […]