Best Linux Monitoring Software and Tools

Getting the best Linux monitoring software and tools for your network is critical in its function. Today, we’ll be looking at all of the best software you can use to manage and monitor a variety of different Linux distros.

Although Windows is the most popular OS for running servers, there’s a good number of Linux servers around the globe. Much like any Windows server, your Linux infrastructure needs to be closely monitored to ensure its timely uptime.

Here’s our list of the best Linux monitoring and software tools:

  1. SolarWinds NetFlow Traffic Analyzer – FREE TRIAL Made by an extremely reputable company in the cybersecurity field, it’s no surprise that the SolarWinds NetFlow Traffic Analyzer takes the top spot in our list. With its masterfully crafted UI, single-pane view of the entire network’s traffic, and an extremely sophisticated root cause detection system, SolarWinds takes the blue ribbon in the world of Linux network monitoring tools. Download a 30-day free trial.
  2. Site24x7 – FREE TRIAL A cloud-based solution giving you access to a variety of functionalities in one tool. Access a 30-day free trial.
  3. ManageEngine OpManager – FREE TRIAL A tool that mostly excels in its simplicity and graphical solutions. Download a 30-day free trial.
  4. Paessler PRTG Network Monitor – FREE TRIAL A sensor-based solution offering quick overviews and detailed analysis when you need it. Download a 30-day free trial.
  5. Datadog Linux Monitoring A purely cloud-based tool capable of integrating multiple OS without a hitch.
  6. Zabbix A free tool with robust analysis and encrypting functionalities.
  7. Nagios Core An open-source solution offering boundless customization if your team has the skills.

The Best Linux Monitoring Tools

1. SolarWinds NetFlow Traffic Analyzer – FREE TRIAL

SolarWinds NetFlow Traffic Analyzer

NetFlow Traffic Analyzer comes from SolarWinds, a company known for creating top-of-the-line monitoring tools.

Like most SolarWinds tools, it comes jam-packed with useful features that fit snugly into a tightly designed user interface. It’ll help you find the users and apps consuming the most of your bandwidth, and let you know if that usage goes over your utilization threshold through its robust alert system.

When it comes to Linux monitoring tools, there are few others that can stand toe to toe with the SolarWinds NetFlow Traffic Analyzer.

Main Features:

  • You can make your own IP address groups, helping you look at traffic from whichever perspective suits you
  • A single-pane view of your whole network traffic
  • Root cause detection – The software does a detailed analysis of any problem it detects and points you to its root cause, minimizing troubleshooting time
  • Clever and intuitive UI
  • Drag-and-drop performance dashboard, letting you place your most important metrics at the forefront so you can see them at a glance
  • A variety of different views and formats
  • Easy integration with other SolarWinds tools makes it the perfect choice if you’re already using some SolarWinds software
  • Simplifies login management through pre-existing Active Directory user profiles

In addition to all of this, SolarWinds NetFlow Traffic Analyzer lets you look at all of your traffic segmented by Class of Service methods. Furthermore, you can monitor how effective CBQoS policies are. Setting up a customized view of traffic for any number of ISPs helps you understand how your traffic is balanced throughout them.

System Requirements:

  • Quad-Core CPU with at least 3GHZ
  • 16GB+ for the Flow Storage Database, and at least 3GB available for the Main Poller
  • A total of 23GB HDD space, 3 for the Main Poller and 20 for the Flow Storage Database
  • This tool will run on Windows Server 2008 R2 SP1, 2012 R2, 2012, and most Linux distros


The SolarWinds Netflow Traffic Analyzer comes with a 30-day free trial and starts at ~$900 afterward.

SolarWinds Netflow Traffic Analyzer Download the 30-day FREE Trial

2. Site24x7 Linux Monitoring – FREE TRIAL

Site24x7 Linux Monitoring

Site24x7 is another cloud-based system to monitor your network’s performance. It is a much wider tool, monitoring every IT service that has some user-facing software. So you can monitor your servers, networks, apps, and more. With that being said, the tool does require an on-site agent to be installed as well.

This tool supports a vast array of Linux distros, as well as some more esoteric OS such as the Raspberry Pi OS. This makes it excellent for hobbyist and semi-professional use.

If you’re looking for a tool that helps you monitor a variety of different aspects of your network in one intuitive package, then Site24x7 might be the tool for you. Its biggest downside is that it can be a bit confusing at times with all of the things on display.

Main Features:

  • You can monitor Linux, Windows, and cloud servers simultaneously
  • VMWare and Hyper-V monitoring visualizations
  • A stack-based visualization of applications showing all of their dependencies and resource use
  • Online customizable console

System Requirements:

  • 2GHZ Processor
  • 8GB RAM
  • 80GB HDD

Pricing: Site24x7 packages start at just $9 per month. Get started with a 30-day free trial.

Site24x7 Linux Monitoring Access a 30-day FREE Trial

3. ManageEngine OpManager – FREE TRIAL

ManageEngine OpManager

The ManageEngine OpManager is one of the most popular tools to help you manage Linux Servers and Network devices. Its main standout feature is the excellence of its dashboard and GUI.

You can monitor a variety of intricate factors, and even the most complicated Linux system won’t present a challenge to it. ManageEngine OpManager is a widely known tool for managing your Linux Servers and Network devices from a centralized dashboard!

The OpManager comes with endless features to help you protect and monitor your network 24/7. For example, its intricate Alerting systems will help you get notified of any suspicious activity in real-time. Another unique feature is its 3D Racks view capabilities which help you visualize the circumstances on your system more easily.

Main Features:

  • Excellent notification and alarm system
  • Clever and intuitive GUI that makes navigating the tool a breeze
  • Customizable dashboards that allow you to look at your infrastructure from multiple angles
  • Hardware monitoring capacities
  • Automatic device discovery, and automatic system discovery on the network

System Requirements:

  • Intel Xeon 3.5 GHz 4 cores/8 threads or higher processor
  • CPUs with a total combined PassMark score of 7,000 or higher
  • 16GB Memory
  • 40GB HDD

Pricing: It varies, you can request a personalized demo of the system and/or start a 30-day free trial.

ManageEngine OpManager Download the 30-day FREE Trial

4. Paessler PRTG Network Monitor – FREE TRIAL

PRTG Network Monitor

The PRTG Network Monitor made by the Paessler company is a monitoring tool prioritizing stability above all else. It’ll give you both a quick overview of your network in addition to giving you a detailed outlook of your device’s performance if you so desire.

The way the PRTG works is rooted in its intricate sensor system. Every sensor pays attention to a specific data type and tracks information about a specific part of your network. The most popular sensors to use for Linux monitoring are as follows:

  • The Load Average Sensor: Tasked with monitoring the average load of your system by using SSH and SNMP
  • The Meminfo Sensor: Tasked with monitoring the RAM available
  • The SNMP Traffic Sensor: Tasked with monitoring device traffic with SNMP
  • The Disk Free Sensor: Tasked with looking at the HDD space available

Main Features:

  • Helps you quickly look at weak points and imbalances within your network
  • Excellent tracking system helping you keep up with unusual traffic and incidents
  • Quick and simple to install
  • A variety of available languages, excellent for non-English companies

Pricing: The price of the PRTG Network Monitor depends on the number of sensors you need. Up to 100 is free of charge, 500 sensors will set you back $1600, going up to $10,500 for 5000 sensors.

There are also two different packages giving you unlimited sensors. The XL1 lets you get unlimited sensors at one core installation for $14,500, while the XL5 does this for five core installations at $60,000.

These prices come with one year of maintenance, with yearly renewals costing you 25% of the price.

This tool also features a 30-day free trial.

Paessler PRTG Network Monitor Download the 30-day FREE Trial

5. Datadog Linux Monitoring

Datadog Linux Monitoring

Datadog is a famous server and application monitoring tool specializing in mapping out the devices supporting a UI including the server operating system.

One of its main advantages is being a purely cloud-based system. This leads to its use in a variety of startups around the globe. Another benefit of the cloud infrastructure is the ability to monitor your Linux servers no matter where they are, however, it can still consolidate their monitoring depending on their geographical distribution.

This is also an excellent tool to use if you’re trying to blend multiple OS into one network, as Datadog lets you monitor all of them.

Main Features:

  • Monitoring of virtualization in addition to container activity
  • The capability of monitoring the support infrastructure of databases and Web servers
  • You can view your network from as high of a level as you want down to an individual server
  • Excellent dashboard, albeit it can get a bit cluttered at times
  • Drag-and-drop customization for your utilities
  • Root cause analysis helps you get to the cause of your problems in record time
  • 400+ integrations that help you further personalize your monitoring
  • Logfile mining

System Requirements: Datadog is a cloud-based tool, so the system requirements are extremely low.

Pricing: Datadog offers three distinct pricing options:

  1. Free: Datadog is free for up to five hosts, and its data retention period in this edition is one day.
  2. Pro: The Datadog Pro version gives you access to 15 months of data retention, and it’ll set you back $15 a month for each host.
  3. Enterprise: The Datadog Enterprise version gives you access to AI-based performance thresholds to take your security to the next level, and will set you back $23 a month for each host.

There is also a 14-day free trial.


6. Zabbix


Zabbix is a tool that excels in its scalability. It offers real-time monitoring based on a variety of metrics it analyzes from the devices on your network.

It’ll spot issues at the time that they come from a device, meaning it isn’t necessary to get a different module to look for problems. Zabbix is also very flexible, helping you prioritize what options you’re most interested in.

Its ability to analyze root causes of issues and detect anomalies in tandem with the different levels of severity you can set makes it an excellent tool for prioritizing different aspects of network security.

It also takes into account past trends on the network, which can help you account for your future needs based on past usage. Although it has graphical and visual representations of your data and infrastructure, some users have found it lacking in some aspects.

Main Features:

  • Excellent third-party integration
  • Multi-OS support, you’ll be hard-pressed to find a commonly used Operating System not supported by Zabbix
  • You can monitor devices within your network through a firewall or DMZ without a hitch
  • Periodic network scans adding new devices to your network map
  • Sublime encryption gives you another layer of security and makes Zabbix one of the most secure Linux monitoring tools
  • Root cause analysis coupled with the software’s ability to automatically fix some problems means you’ll have more time to focus on the aspects of your network requiring human attention
  • Aids with conforming to a variety of industry standards
  • Even if your network has issues or fails, Zabbix will keep on collecting data
  • It’s completely free, making it a great starting tool for Linux monitoring

If you can ignore some of the software’s rough edges, you’ll find that Zabbix is a very promising Linux monitoring tool, and it’s free to boot.

System Requirements: Highly dependent on the number of hosts and parameters you want to monitor. However, the baseline is rather low.

Pricing: Zabbix is completely free

7. Nagios Core

Nagios Core

Nagios Core refers to the monitoring & alerting engine on top of which there have been hundreds of different apps built. It isn’t very well suited for newcomers to the cybersecurity world, as it’s quite a complex tool, however, there are only a couple of tools on this list that could compete with it in robustness.

One of its standout features is the ability to develop your own service checks. This lets you personalize some aspects of your network security as much as you want. If you’re looking for a challenging tool that can be an amazing solution in the hands of highly qualified cybersecurity professionals, Nagios Core might be the tool for you.

Main Features:

  • Fully customizable system for making your own service checks
  • An open-source tool with a vast community
  • A variety of different metrics are monitored by the tool at all times
  • Easily definable network host hierarchies
  • Nagios Core rotates log files at regular time intervals
  • Customizable dashboards
  • Script APIs that’ll let you monitor remote and local systems alike with precision
  • Nagios Core makes taking a centralized look at your infrastructure a breeze

System Requirements:

  • Linux or Unix OS with network access
  • A-C compiler
  • Apache or another webserver
  • Thomas Boutell’s gd library version 1.6.3 or above

Pricing: Open source and hence free to use.

A system running Linux or Unix. Should have network access and a C compiler.

A web server, preferably Apache. Thomas Boutell’s gd library version 1.6.3 or higher

Download: You can download Nagios Core from https://www.nagios.org/downloads/