If you’re working as a Linux/Unix system administrator, sure you know that you must have useful monitoring tools to monitor your system performance. As monitoring tools are very important in the job of a system administrator or a server webmaster, it’s the best way to keep an eye on what’s going on inside your system.
[ You might also like: 20 Command Line Tools to Monitor Linux Performance ]
Today we’re going to talk about another 13 Linux monitoring tools that you may use to do the job.
1. Glances – Real-Time Linux System Monitoring
Glances is a monitoring tool built to present as much information as possible in any terminal size, it automatically takes the terminal window size it runs on, in other words, it’s a responsive monitoring tool.
Glances not only shows information about CPU and memory usage but also monitors filesystem I/O, network I/O, hardware temperatures, fan speeds, disk usage, and logical volume.
Install Glances in Linux
To install the latest stable version of Glances, just enter the following command line:
$ curl -L https://bit.ly/glances | /bin/bash or $ wget -O- https://bit.ly/glances | /bin/bash
2. Sarg – Squid Bandwidth Monitoring
Sarg (Squid Analysis Report Generator) is a free and open-source tool that acts as a monitoring tool for your Squid proxy server, it creates reports about your Squid proxy server users, IP addresses, the sites they visit, and some other information.
For installation, read our article – Install Sarg “Squid Bandwidth Monitoring” Tool in Linux
3. Apache Status Monitoring
The mod_status is an Apache server module that allows you to monitor the workers’ status of the Apache server. It generates a report in an easy-to-read HTML format. It shows you the status of all the workers, how much CPU each one using, what requests are currently handled, and the number of working and not working workers.
For installation, read our article – How to Monitor Apache Web Server Load and Page Statistics
4. Monit – Linux Process and Services Monitoring
Monit is a nice program that monitors your Linux and Unix server, it can monitor everything you have on your server, from the main server (Apache, Nginx..) to files permissions, files hashes, and web services. Plus a lot of things.
Install Monit in Linux
To install the stable version of Monit, just enter the following command line:
$ sudo apt install monit [On Debian, Ubuntu and Mint] $ sudo yum install monit [On RHEL/CentOS/Fedora and Rocky Linux/AlmaLinux] $ sudo emerge -a app-admin/monit [On Gentoo Linux] $ sudo pacman -S monit [On Arch Linux] $ sudo zypper install monit [On OpenSUSE]
5. Sysstat – All-in-One System Performance Monitoring
Another useful monitoring tool for your Linux system is Sysstat – is not a real command, in fact, it’s just the name of the project, Sysstat, in fact, is a package that includes many performance monitoring tools like iostat, sadf, pidstat beside many other tools which shows you many statistics about your Linux OS.
Features of Sysstat
- It is available in all modern Linux distributions repositories by default.
- Ability to create statistics about RAM, CPU, SWAP usage. Besides the ability to monitor Linux kernel activity, NFS server, Sockets, TTY, and filesystems.
- Ability to monitor input & output statistics for devices, tasks.. etc.
- Ability to output reports about network interfaces and devices, with support for IPv6.
- Sysstat can show you the power statistics (usage, devices, the fans’ speed.. etc) as well.
- Many other features…
Install Sysstat in Linux
To install the stable version of Sysstat, just enter the following command line:
$ sudo apt install sysstat [On Debian, Ubuntu and Mint] $ sudo yum install sysstat [On RHEL/CentOS/Fedora and Rocky Linux/AlmaLinux] $ sudo emerge -a app-admin/sysstat [On Gentoo Linux] $ sudo pacman -S sysstat [On Arch Linux] $ sudo zypper install sysstat [On OpenSUSE]
For usage and examples, read our article – 20 Useful Commands of Sysstat
6. Icinga – Next Generation Server Monitoring
Unlike the other tools, Icinga is a network monitoring program, it shows you many options and information about your network connections, devices, and processes, it’s a very good choice for those who are looking for a good tool to monitor networking stuff.
Features of Icinga
- Icinga is also free and open-source.
- Very functional in monitoring everything you may have in networking.
- Support for MySQL and PostgreSQL is included.
- Real-time monitoring with A nice web interface.
- Very expandable with modules and extensions.
- Icinga supports applying services and actions to hosts.
- A lot more to discover…
For installation, read our article – How to Install Icinga Server Monitoring Tool in Linux
7. Observium – Network Management and Monitoring
Observium is also a network monitoring tool, it was designed to help you manage your network of servers easily, there are 2 versions from it; Community Edition which is free and open-source, and Commercial version which costs £1,000/year.
Features of Observium
- Written in PHP with MySQL database support.
- Has a nice web interface to output information and data.
- Ability to manage and monitor hundreds of hosts worldwide.
- The community version from it is licensed under the QPL license.
- Works on Windows, Linux, FreeBSD, and more.
For installation, read our article – Install Observium Network Management and Monitoring Tool in Linux
8. Web VMStat – System Statistics Monitoring
Web VMStat is a very simple web application programmer, that provides real-time system information usage, from CPU to RAM, Swap, and input/output information in html format.
For installation, read our article – Web VMStat: A Real-Time System Statistics Tool for Linux
9. PHP Server Monitoring
Unlike the other tools on this list, PHP Server Monitoring is a web script written in PHP that helps you to manage your websites and hosts easily, it supports MySQL database and is released under GPL 3 or later.
Features
- A nice web interface.
- Ability to send notifications to you via Email & SMS.
- Ability to view the most important information about CPU and RAM.
- A very modern logging system to log connection errors and emails that are sent.
- Support for cronjob services to help you monitor your servers and websites automatically.
For installation, read our article – Install PHP Server Monitoring Tool in Linux
10. Linux Dash – Linux Server Performance Monitoring
From its name, “Linux Dash” is a web dashboard that shows you the most important information about your Linux systems such as RAM, CPU, file-system, running processes, users, bandwidth usage in real-time, it has a nice GUI and it’s free & open-source.
For installation, read our article – Install Linux Dash (Linux Performance Monitoring) Tool in Linux
11. Cacti – Network and System Monitoring
Cacti is nothing more than a free & open-source web interface for RRDtool, it is used often to monitor the bandwidth using SNMP (Simple Network Management Protocol), it can be used also to monitor CPU usage.
For installation, read our article – Install Cacti Network and System Monitoring Tool in Linux
12. Munin – Network Monitoring
Munin is also a web interface GUI for RRDtool, it was written in Perl and licensed under GPL, Munin is a good tool to monitor systems, networks, applications, and services.
It works on all Unix-like operating systems and has a nice plugin system; there are 500+ different plugins available to monitor anything you want on your machine. A notifications system is available to send messages to the administrator when there’s an error or when the error is resolved.
For installation, read our article – Install Munin Network Monitoring Tool in Linux
13. Wireshark – Network Protocol Analyzer
Also, unlike all the other tools on our list, Wireshark is an analyzer desktop program that is used to analyze network packets and monitor network connections. It’s written in C with the GTK+ library and released under the GPL license.
Features
- Cross-platform: it works on Linux, BSD, Mac OS X, and Windows.
- Command-line support: there’s a command-line-based version from Wireshark to analyze data.
- Ability to capture VoIP calls, USB traffic, network data easily to analyze it.
- Available in most Linux distributions repositories.
For installation, read our article – Install Wireshark – Network Protocol Analyzer Tool in Linux
These were the most important tools to monitor your Linux/Unix machines, of course, there are many other tools, but these are the most famous. Share your thoughts with us in the comments: What tools & programs do you use to monitor your systems? Have you used any of the tools on this list? What do you think about them?