Log Analyzers

14 Best Free and Open Source Linux System Monitoring Tools

Computer monitoring systems are used to gather data for the purpose of real-time incident notification, performance analysis, and system health verification. Without such a tool, a system administrator would have to login to each machine to collect information on a regular basis.

System monitoring can also help identify problems before they escalate to emergency status. This type of software is not only useful for network administrators. Home users with a small network or even just a single computer will benefit from advanced notification provided by system monitoring tools. Knowing that free space on the hard disk is running out, or that a particular server/daemon has gone down can be extremely useful.

These types of systems gather data relating to CPU, memory, network, disk utilization, response time of network services, and much more.

To provide an insight into the quality of software that is available, we have compiled a list of 14 Linux system monitoring tools. Hopefully, there will be something of interest here for anyone who wants to monitor a specific service or situation.

For a comprehensive application performance monitoring solution look at ManageEngine Applications Manager.

Best Free and Open Source System Monitoring Tools

Let’s explore the 14 system monitoring applications at hand. For each title we have compiled its own portal page, a full description with an in-depth analysis of its features, screenshots, together with links to relevant resources.

System Monitoring Tools
NagiosHost and service monitor designed to inform you of network problems
OpenNMSEnterprise grade network monitoring platform
LibreNMSFully featured network monitoring system
ZABBIXAll-in-one 24x7 free monitoring solution
CockpitSysadmin login session in a web browser
MonitUtility for managing and monitoring processes, files, directories and filesystems
CactiWeb-based frontend to RRDtool
NetXMSNetwork and infrastructure monitoring and management system
FreeNATSAutomatic network status testing, alerting and reporting package
MonitorixLightweight system monitoring tool
IcingaMonitoring platform with a powerful configuration language
XymonSystem for monitoring of hosts and networks
Pandora FMSFlexible monitoring system
MonGeneral-purpose problem alerting system

Read our complete collection of recommended free and open source software. The collection covers all categories of software.

The software collection forms part of our series of informative articles for Linux enthusiasts. There are hundreds of in-depth reviews, open source alternatives to proprietary software from large corporations like Google, Microsoft, Apple, Adobe, IBM, Cisco, Oracle, and Autodesk. There are also fun things to try, hardware, free programming books and tutorials, and much more.
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