Linux 101: What are environment variables?
Jack Wallen introduces you to Linux environment variables. What are they and how are they set and unset?
Open source
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Mobility How to sync Android to Zorin OS 16
Jack Wallen walks you through the process of connecting Zorin OS to Android for easy file sharing, SMS management and more.
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Image: Anawat Sudchanham/EyeEm/Getty Images Security How to install fail2ban on Rocky Linux and AlmaLinux
Fail2ban should be on every one of your Linux servers. If you've yet to install it on either Rocky Linux or AlmaLinux, Jack Wallen is here to help you out with that.
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Networking How to monitor your Linux servers with Checkmk
Find out how to set up the powerful Checkmk monitor to keep tabs on all of your networked servers.
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Software Zorin OS 16 is exactly what a Linux desktop distribution should be
Jack Wallen gives the latest version of Zorin OS a go and comes away with his mind sufficiently blown and a different opinion on what Linux distributions should be.
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Illustration: Lisa Hornung/TechRepublic Developer Docker launches new business plan with changes to the Docker Desktop license
Docker announced a new subscription plan for enterprises and free access to Docker Desktop for personal use, educational institutions, non-commercial open-source projects and small businesses.
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Image: Jack Wallen Software Linux 101: How to easily view real-time log entries with tail
The tail command makes it easy to view log entries as they are written in real-time. Jack Wallen shows you how to make use of this indispensable tool.
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Image: GettyImages/Yuichiro Chino Security How to create locally signed SSL certificates with mkcert
If you need to generate quick SSL certificates for test servers and services, mkcert might be the fastest option available. Jack Wallen shows you how to use this handy tool.
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Networking How to view Docker logs to troubleshoot containers
If you deploy containers with Docker, at some point you'll need to troubleshoot. Jack Wallen shows you how to do so with the logs command.
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Illustration: Lisa Hornung/TechRepublic Software Tux: A brief history of the Linux mascot
Ever wonder where Tux the penguin came from? Jack Wallen offers up a bit of a history lesson.
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Illustration: Lisa Hornung/TechRepublic Software Linux, happy 30th birthday! What the future holds for Linux
Jack Wallen explains how Linux has changed computing for the better and ponders what might be next for the open source OS created by Linus Torvalds.
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Image: iStock/AndreyPopov Data Centers Deploy this powerful open-source invoicing system to your data center
If you're looking for an open-source invoice system to deploy, Jack Wallen believes Invoice Plane might be just the solution to meet your needs.
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Data Centers How to configure SSH access through Webmin
Looking for an easier way to configure SSH on your data center servers? How about Webmin? Jack Wallen walks you through some of the options for better SSH security using this web-based GUI.
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Image: Jack Wallen Software Linux 101: How to delete files and folders from the CLI
In another entry of his Linux 101 series, Jack Wallen shows you how to delete files and folders from Linux using the Command Line Interface (CLI).
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Illustration: Lisa Hornung/TechRepublic Security How to install Webmin on Rocky Linux
With Webmin, you can better secure and manage your instances of Rocky Linux. Jack Wallen walks you through the process of getting this web-based tool up and running.