Monitoring a Linux system involves tracking various system metrics such as CPU usage, memory utilization, disk activity, network performance, and process management. There are many tools available for monitoring, both command-line based and graphical.
- Nagios: An open-source monitoring system that enables administrators to identify and resolve IT infrastructure problems.
- Prometheus: A powerful monitoring and alerting toolkit designed for reliability and scalability.
- Zabbix: An enterprise-class monitoring solution for networks and applications.
- Icinga: An open-source monitoring system that checks the availability of your network resources, notifies users of outages, and generates performance data.
- Monit: A small open-source utility for managing and monitoring Unix systems. It conducts automatic maintenance and repair and can execute meaningful causal actions in error situations.
- ELK Stack: A powerful set of tools (Elasticsearch, Logstash, and Kibana) for searching, analyzing, and visualizing log data in real-time.
- Grafana: An open-source platform for monitoring and observability. It allows you to query, visualize, alert on, and understand your metrics no matter where they are stored.
Above tools were needed for monitoring many systems. As a linux admin you need also to be familiar with Basic Command-Line Monitoring Tools.
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