Checkmk Blog

Meet the new Checkmk lineup

Mon, 16 Mar 2026 23:00:00 +0000

We've given our editions new names: Checkmk Community, Pro, Ultimate, and Cloud. The goal is simple — make it easier for you to find the edition that fits your needs and understand exactly what you're getting at each tier.

Linux Enterprise: What Checkmk administrators need to know about Debian 13, RHEL 10 & Co.

Wed, 17 Dec 2025 12:34:00 +0000

Checkmk now supports RHEL 10, Debian 13, and SLES 15 SP7. Learn about the most important new features and how to upgrade your Linux securely.

Set up Postfix to relay Checkmk's notifications

Tue, 02 Sep 2025 14:01:00 +0000

Set up Postfix to relay Checkmk notifications reliably and securely. This guide walks you through installing Postfix, configuring it as a local MTA, setting up secure relaying via your mail provider, and integrating it with Checkmk to ensure your monitoring alerts are delivered without fail.

Let’s Encrypt certificate monitoring with Checkmk

Tue, 03 Jun 2025 18:00:00 +0000

Checkmk is a robust yet user-friendly monitoring tool that makes tracking Let's Encrypt certificates simple and efficient, thanks to its one-package installation, moderate hardware demands, and easy extensibility.

Checkmk 2.4: What’s inside the latest release

Tue, 06 May 2025 09:00:00 +0000

Get a concise overview of the new features and improvements in Checkmk 2.4 – including helpful links to release notes, product pages, blog posts, and documentation.

Simply smarter notifications – With the new Checkmk Notification Hub

Tue, 06 May 2025 08:00:00 +0000

Checkmk 2.4 introduces a revamped notification system that’s just as powerful as before — but far easier to use.

Migrating to the new HTTP active check

Tue, 06 May 2025 08:00:00 +0000

Learn how you migrate to the new HTTP active check with Checkmk 2.4.

Checkmk SysAdmin survey: Rising complexity puts IT teams to the test

Wed, 16 Apr 2025 07:00:00 +0000

The “Rising to the challenge” survey, conducted by Checkmk, highlights the complexity, the trends, and the strategies in the industry.

Seamless SIGNL4 & Checkmk integration

Mon, 24 Mar 2025 07:00:00 +0000

The SIGNL4 and Checkmk integration ensures that IT teams receive real-time mobile alerts and can update problem statuses without extra effort.

Not all monitoring is created equal: what we mean by IT monitoring

Wed, 12 Mar 2025 07:00:00 +0000

IT monitoring means different things to different people. It can be a vague term, or badly defined. What do we at Checkmk mean by "IT monitoring"?

What’s new in the agent-based Check API v2

Wed, 05 Mar 2025 07:00:00 +0000

The Check API v1 will no longer be supported in Checkmk 2.4. Now is the time to migrate your check plug-ins to the new Check API v2 before the release of version 2.4.0.

Introducing our SaaS version of Checkmk

Tue, 11 Feb 2025 10:15:00 +0000

The SaaS version of Checkmk has just launched! With it you can offload monitoring infrastructure and its maintenance and focus on what matters most: monitoring.

Fast time to value, first host in 5 minutes

Tue, 11 Feb 2025 08:15:00 +0000

The new onboarding for Checkmk Cloud is as intuitive as it gets, focused on providing fast time to value, 5 minutes max to monitoring.

A better check_http – the technical background

Thu, 19 Dec 2024 12:00:00 +0000

The check_http plugin from Monitoring-Plugins.org has been a cornerstone of active checks in Nagios-based monitoring systems like Checkmk, Icinga, Naemon and Zabbix. In this article, we explore the technical reasoning behind creating a new implementation of this essential tool. You'll also discover how to install it on non-Checkmk systems and use it effectively from the command-line.

Next generation MS SQL monitoring with Checkmk

Fri, 08 Nov 2024 09:00:00 +0000

Presenting the upgraded MS SQL monitoring plug-in with Checkmk 2.3 with improved performance, flexibility, and robustness in monitoring databases.

Build a Network Layer Visualization with Checkmk

Fri, 28 Jun 2024 08:00:00 +0000

Learn how to use the NVDTC plug-in to create a network topology of your infrastructure with Checkmk.

End-to-End Monitoring with Checkmk: Configuring Robotmk

Wed, 26 Jun 2024 13:00:00 +0000

Monitoring applications end-to-end is as vast as essential in infrastructure monitoring. We discussed what it is in the previous part, titled “E2E-Monitoring: Make sure your applications are running”. In this second part we will see how to configure and execute robot suites with Robotmk in Checkmk 2.3 to have an End-to-End monitoring setup.

Discover all features of Checkmk 2.3

Mon, 29 Apr 2024 11:59:00 +0000

Checkmk 2.3 is here. With the new release, we are not only introducing a new add-on with Synthetic Monitoring, but many other features. You can find all details here.

How to monitor servers with broken TLS in Checkmk 2.3

Tue, 26 Mar 2024 08:00:00 +0000

With Checkmk 2.3.0 we bumped the version of OpenSSL from 1.1 to 3.0. This means much stricter defaults regarding security relevant ciphers, handshake and renegotiation settings. You might experience failing active checks for all kinds of services, including but not limited to check_http, check_smtp and several others. Here is how to work around potential problems.

SysAdmin Survey 2024: The Consolidation of IT Tools

Tue, 06 Feb 2024 09:00:00 +0000

How many IT tools are used, and what is their value? Is there a need to consolidate them? This and more questions were asked in our yearly survey for SysAdmin Day 2024. Let's see what IT professionals have to say about consolidating IT tools and much more.