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The nmcli command lets you tap into the power of the NetworkManager tool directly from the Linux command line. It's an integral part of the NetworkManager package that makes use of an application programmer's interface (API) to access NetworkManager's functionality.

Secrecy is one of the most important functions of computer science. Should electronic secrecy suddenly collapse into total transparency, we could not engage in electronic commerce, we would be unable to communicate privately, our past communications would be globally visible, and we would be critically impacted in myriad ways that would fundamentally change our ability to work and live. Consider the time we spend every day maintaining our secrecy with passwords, lock patterns, wireless fobs, and biometrics that restrict access to protect us and the ramifications of their failure.

Since 2007, game publishers and game stores have teamed up to provide free samples of RPG gameplay to the uninitiated. Last year, Free RPG Day was an official, multi-publisher, worldwide event that welcomed people who were either entirely new to tabletop roleplaying games, or who were just new to specific games, to get together with new friends and play new games.

In my previous seven articles in this series about systemd, and especially in the most recent article, time and date have come up in multiple contexts. systemd uses calendar time, specifying one or more moments in time to trigger events (such as a backup program), as well as timestamped entries in the journal. It can also use timespans, which define the amount of time between two events but are not directly tied to specific calendar times.

There's a question that pops up quite frequently at TotalCross—in our day-to-day work, after presentations, in Reddit discussions, and sometimes even in our Telegram channel. Let's answer it once and for all: No, TotalCross Virtual Machine is not another Java Virtual Machine. This article explains the differences between the two, how TotalCross interacts with Java, and how to know which is best for your application.

You have tests for everything; maybe you even have a badge in your project repository stating 100% test coverage. But what are these tests helping you do? How do you know?

The Corona-Warn-App is an awesome example of how governments and public administrations can use open source software development to help citizens while simultaneously advancing the technology ecosystem. The app helps trace infection chains of SARS-CoV-2 (the virus that causes COVID-19) in Germany.

Microsoft's growing appreciation for Linux and open source is no secret. The company has steadily increased its contributions to open source in the last several years, including porting some of its software and tools to Linux.

Over the last six months, I have been working on GoDBLedger, an open source accounting system that I feel addresses some of the issues that plague current accounting software solutions. Even in my first year as a graduate accountant, the software frustrated me because I have seen what good software can be like and how much it can improve your productivity.

Content management system (CMS) is a prolific software category that covers all types of applications for the creation and modification of digital content. So it should come as no huge surprise that the history of the CMS traces back to the first website in history, by Tim Berners-Lee in 1990, which was modeled on an internet-based hypertext system HTML, which represented just text and links.

Whether you're starting up an elaborate Raspberry Pi homelab or you're managing a building full of workstations, sometimes you need to do the same task on multiple hosts. There are many ways to automate tasks across systems. Ansible, for instance, ensures all systems are in the same state, and sometimes a simple cron job will do.

The concepts behind the Kubernetes container orchestration system can be hard to understand. I created a simple analogy about renting out rooms in a house to help you learn how Kubernetes works.

Imagine you own a house with 10 rooms. You want to rent out three of the rooms through an online accommodation service. You have two choices: you can post ads and manage everything yourself, or you can hire someone to do it for you.

Public education has always been a core value in my family. It was instilled in me from a young age that everybody deserves fair access to high-quality education. This virtue continues to influence me as I raise children of my own, one of whom will be entering kindergarten this fall. Open source is the perfect match for public education.

Web services, in one form or another, have been around for more than two decades. For example, XML-RPC services appeared in the late 1990s, followed shortly by ones written in the SOAP offshoot. Services in the REST architectural style also made the scene about two decades ago, soon after the XML-RPC and SOAP trailblazers.

There is a tendency in the tech community to use the terms DevSecOps and agile development interchangeably. While there are some similarities, such as that both aim to detect risks earlier, there are also distinctions that drastically alter how each would work in your organization.

I am a big fan of command-line applications, and I spend a lot of time working in a terminal. Terminal-based applications are, in many cases, faster, more flexible, and more intuitive than their graphical user interface (GUI) counterparts.

Having a flexible and powerful terminal with many command-line tools makes me more productive. This is one of the main reasons I moved to Linux several years ago and never looked back.

My open source journey started rather late in comparison to many of my peers and colleagues.

We're entering a collaboration platform renaissance as remote work becomes the norm for enterprises large and small. Microsoft SharePoint—a collaboration platform available on premises or in the cloud—is the de-facto standard for corporations and government agencies. However, SharePoint implementations are infamous for the challenges that prevent their completion.

A decade ago, I started my first job that required me to use Linux as my laptop's operating system. I was offered a range of variants, including Gentoo, if I was so inclined, but since I had used Ubuntu briefly in the past, I opted for Ubuntu Lucid Lynx 10.04.

My terminal, Konsole, was themed in Zenburn and had a Bash prompt that looked like this:

Everyone likes to set up their workspaces in a specific way; it helps your productivity and makes life easier to have things organized in a way that feels organic and to have an environment that feels good to you. That definitely applies to terminals too; that's probably why there are so many terminal options available.

When starting on a new computer, the very first thing I do is set up my terminal to make it my own.