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NoSQL databases are every bit as popular today as more conventional, relational ones. One of the most popular NoSQL systems is Apache Cassandra. It’s designed to deal with big data, and can be scaled across large numbers of servers. This makes it resilient and highly available.

In the previous articles in this series (see part 1, part 2, part 3, and part 4), you learned how to use Pygame and Python to spawn a playable character in an as-yet empty video game world. But, what's a hero without a villain? Add one for your hero to fight.

A roundup of stories/articles for weekend reading.

Touch-panel systems based on Linux, and to a lesser extent, Android, are gaining share from those that use the still widely used Windows Embedded, and over the past year, several Raspberry Pi based systems have reached market. Here we look at six RPi-based contenders.

KDE Student Programs is happy to present our 2018 Google Summer of Code students to the KDE Community. Students will work on improving KStars for Android. Traditionally, Google Summer of Code starts with an introduction period where students get to know their mentors, after which they start coding. The coding period for 2018 has began on May 14, and will last until August 6. We wish all our students a productive, successful, and fun summer!

News briefs for May 18, 2018.

In this tutorial, I will show you step-by-step how to install and configure Kubernetes and Docker on CentOS 7. Kubernetes is an open source platform for managing containerized applications developed by Google. It allows you to manage, scale, and automatically deploy your containerized applications in the clustered environment.

Today KDE unveils a beta release of Plasma 5.13.0. Members of the Plasma team have been working hard to continue making Plasma a lightweight and responsive desktop which loads and runs quickly, but remains full-featured with a polished look and feel.

The Raspberry Pi 3 and RPi 3 Compute Module are quickly expanding into the industrial touch-panel market. Here’s a guide to six RPi-based contenders. In the smart home, voice agents are increasingly replacing the smartphone touchscreen interface as the primary human-machine interface (HMI). Yet, in noisier industrial and retail IoT environments, touchscreens are usually the […]

Regular expressions can be one of the most powerful tools in your toolbox as a Linux user, system administrator, or even as a programmer. It can also be one of the most daunting things to learn, but it doesn't have to be! While there are an infinite number of ways to write an expression, you don't have to learn every single switch and flag. In this short how-to, I'll show you a few simple ways to use regex that will have you running in no time and share some follow-up resources that will make you a regex master if you want to be. read more

News briefs for May 17, 2018.

I had a fascinating job once that involved designing hardening procedures for systems we were going to use for security-related projects. This was probably 15 years ago, and not only were guides a little thin on the ground for the Linux distribution I was using, but what we were doing was quite niche. At first, I think I'd assumed I could just write a script to close down a few holes that originated from daemons1 that had been left running for no reasons: httpd, sendmail, stuff like that.

Klashwerks has launched a $299, gesture controlled “Raven” dashcam, security system, navigation tool, and OBD-II telematics reporting device, which runs Android on a Snapdragon 650 and offers front- and cabin-facing HD cameras. Klashwerks’ Android-based Raven dashcam and automotive computer was a hit on Indiegogo and won a CES Innovation Award. Now it’s available publicly for […]

After launching in 2017, the OpenDev Conference is now an annual event. At the inaugural event last September, the conference focus was on edge computing. This year's event, taking place May 22-23, will be focused on Continuous Integration/Continuous Deployment (CI/CD) and will be co-located with the OpenStack Summit in Vancouver.

This article enables you to discover numerous tools for porting and tuning applications for Linux on Power: an integrated development environment (IDE), compilers and toolchains, performance and utilization analysis, emulation, instruction timing, high-performance application programming interfaces, and libraries.

One of the most universally used Linux/Unix tools is now included by default in Windows 10: OpenSSH. Here's how to get started with it. Windows 10 is becoming a useful Unix/Linux sysadmin platform. First, it has incorporated Windows Subsystem for Linux in the Windows 10 Fall Creators Update. Now, in the Windows 10 April 2018 Update, Microsoft has finally brought a native Secure Shell (SSH) to Windows.

Sometimes you want to monitor what new information is being written to a file (think of log files), or for whatever reasons, want to access the last few lines of a file. Well, there's a command line utility that lets you do this in Linux, and it's call tail.

Topics such as licensing and governance are complex but nonetheless critical considerations for open source projects. The Linux Foundation’s Scott Nicholas will examine various approaches for structuring open source projects with these requirements in mind. This free, hour-long webinar (at 10:00 am Pacific, May 30, 2018) will address some of the differences that exist in community-driven governance and will explore various case studies

News briefs for May 16, 2018.

If you are new to this series (and to Linux), take a look at our first installment. In that article, we worked our way through the tree-like structure of the Linux filesystem, or more precisely, the File Hierarchy Standard. I recommend reading through it to make sure you understand what you can and cannot safely touch. Because this time around, I’ll show how to get all touchy-feely with your directories.