nagios
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Description:
Network monitoring and management system
Type: Formula  |  Tracked Since: Dec 28, 2025
Links: Homepage  |  @nagiosinc  |  formulae.brew.sh
Category: Monitoring
Tags: monitoring networking devops sysadmin alerting
Install: brew install nagios
About:
Nagios is a powerful open-source monitoring system designed to monitor networks, servers, applications, and infrastructure. It provides comprehensive alerting capabilities to notify administrators of issues and offers a web interface for visualizing current and historical status data. Its primary value is enabling proactive problem detection to ensure service availability and reliability.
Key Features:
  • Extensible architecture via plugins for custom monitoring
  • Powerful alerting system with escalations and dependencies
  • Web-based dashboard for status visualization and reporting
  • Support for monitoring hosts, services, and network protocols
Use Cases:
  • Monitoring server uptime and resource utilization (CPU, memory, disk)
  • Tracking network device health and connectivity via ICMP/SNMP
  • Alerting on critical application failures or service outages
Alternatives:
  • Prometheus – Prometheus uses a pull-based model and is ideal for cloud-native metrics, whereas Nagios is traditionally push/event-based and excels at host availability monitoring.
  • Zabbix – Zabbix offers an all-in-one solution with built-in database and UI, while Nagios relies more heavily on plugins and external integrations for flexibility.
Version History
Detected Version Rev Change Commit
Sep 16, 2025 4:58am 0 VERSION_BUMP 05642699
Nov 19, 2024 6:48pm 0 VERSION_BUMP 39cf6df0
Oct 8, 2024 5:34pm 0 VERSION_BUMP 90cec8cf
Oct 8, 2024 3:44pm 0 VERSION_BUMP e46012d4
Sep 14, 2024 6:27am 0 VERSION_BUMP 976dfa38