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In previous articles, I have written about container images and runtimes. In this article, I look at how containers are made possible by a foundation of some special Linux technologies, including namespaces and control groups.

One of the reasons so many DOS applications sported a text user interface (or TUI) is because it was so easy to do. The standard way to control console input and output (conio) was with the conio library for many C programmers. This is a de-facto standard library on DOS, which gained popularity as implemented by Borland's proprietary C compiler as conio.h. read more

PostfixAdmin is a free, open-source, and web-based interface used for managing Postfix mail server from the web browser. In this article, I will explain how to install PostfixAdmin on Debian 11.

Typing commands into a darkened terminal window may seem antiquated to some, but for many computer users, it's the most efficient, most accessible, and clearest way to accomplish nearly any task a computer is capable of performing. These days, thanks to all the projects that bring open source commands to non-open platforms like macOS and Windows, terminal commands are relevant to everybody, not just Linux and BSD users.

Some users won't be happy.

Not only the Linux distros are open-source but the apps for Linux are also free. Though some business apps come with a cost, most of the apps created for individuals don’t have any charges. Want to know about some of the cool apps to download on your Linux machine? This article walks you through 7 apps to download on Linux to make your life easier. Head over to the next section!

Today, Mozilla published an independent security audit of its Mozilla VPN, which provides encryption and device-level protection of your connection and information when you are on the Web, from Cure53, an unbiased cybersecurity firm based in Berlin with more than 15 years of running software testing and code auditing. Mozilla periodically works with third-party organizations […]

Red Hat won't support CentOS 8 past the end of the year, but CloudLinux will provide updates and support to CentOS 8 until the end of 2025.

Introduction Why does Linux remain vastly invisible to ordinary folks who make general use of computers? This article steps through the process to move to Fedora Linux Workstation for non-Linux users. It also describes features of the GUI (Graphic User Interface) and CLI (Command Line Interface) for the newcomer. This is a quick introduction, not […]

To address security issues posed by clear http communication in our previous crowdsec multi-server installation, we propose solutions to achieve communication between Crowdsec agents over encrypted channels. On top of that, the third solution allows server-2 or server-3 to trust server-1 identity, and avoid man-in -the -middle attacks.

A container image contains a packaged application, along with its dependencies, and information on what processes it runs when launched.

Learning is based on the open exchange of ideas and experiences. By sharing, testing, and practicing what we've learned with others, we're able to develop in our lives and careers. It follows that openness is the ideal state for any successful learning organization. 

I have a printer in my office, but sometimes I work on my laptop in another room of the house. This isn't a problem for me for two reasons. First of all, I rarely print anything on paper and have gone months without using the printer. Secondly, though, I've set the printer to be shared over my home network, so I can send files to print from anywhere in the house. I didn't need any special equipment for this setup. It's accomplished with just my usual Linux computer and the Common Unix Printing System (CUPS).

The SCO vs. IBM lawsuit that was once seen as an existential threat to Linux became a bad legal joke. Now the suit may finally be put to rest. Well, some of it anyway.

In my last article, I gave a brief introduction to using the ncurses library to write text-mode interactive applications in C. With ncurses, we can control where and how text gets displayed on the terminal. read more

Yarn is a fast, secure, and reliable NODE package manager that enables you to automate the installation, configuring, updating, and removing of npm packages. In this tutorial, I will explain the installation procedure of Yarn on Ubuntu 20.04 distribution. Moreover, we will also discuss the yarn basics and some useful commands.

DNF divides updates in three types: "security", "bugfix" and "enhancement". You can filter which types you want to operate on.

Ancient 'Who owns Unix?' case puts a $14.25M price tag on making some claims go away One strand of the ancient and convoluted SCO versus IBM legal mess that sought to determine who owns UNIX – and perhaps has a claim over Linux – may be about to end.…

Most Linux utilities just scroll text from the bottom of the screen. But what if you wanted to position text on the screen, such as for a game or a data display? That's where ncurses comes in.

Every so often, I need to do some calculations related to dates. A few days ago, a colleague asked me to set up a new project definition in our (open source, of course!) project management system. This project is to start on the 1st of August and finish on the 31st of December. The service to be provided is budgeted at 10 hours per week. So, yeah, I had to figure out how many weeks between 2021-08-01 and 2021-12-31 inclusive. This is the perfect sort of problem to solve with a tiny Groovy script. read more