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About a year ago, I wrote about measuring air quality using a Raspberry Pi and a cheap sensor. We've been using this project in our school and privately for a few years now. However, it has one disadvantage: It is not portable because it depends on a WLAN network or a wired network connection to work. You can't even access the sensor's measurements if the Raspberry Pi and the smartphone or computer are not on the same network.

One binary to rule them all. Mozilla this week announced a project called WASI (WebAssembly System Interface) to standardize how WebAssembly code interacts with operating systems. If the project succeeds, it will do what Oracle's Java Virtual Machine does, but better and more broadly.…

WhiteSource review of programming language security errors reveal which languages have the most security holes. The winner? C. But that's only the start of the story.

In this week's edition of our open source news roundup, we take a look at a 3D-print system for optical cardiography, Carnegie Mellon's Digital Learning Tools, Apache Software Foundation's 20th anniversary, and more.

I spend a lot of time doing research for my books and Opensource.com articles. Sometimes this leads me to discover bugs in the software I use, including Fedora and the Linux kernel. As a long-time Linux user and sysadmin, I have benefited greatly from GNU/Linux, and I like to give back. I am not a C language programmer, so I don't create fixes and submit them with bug reports, as some people do. But a way I can return some value to the Linux community is by reporting bugs. read more

News briefs for March 29, 2019.

Using applications is the main purpose of a Linux server. Whether your newly installed application runs from a desktop or the command line, this article helps you use your Microsoft Windows experience to quickly understand how to run applications on Linux.

Linux has been described as one of the most secure operating systems available, but the National Security Agency (NSA) has taken Linux to the next level with the introduction of Security-Enhanced Linux (SELinux). SELinux takes the existing GNU/Linux operating system and extends it with kernel and user-space modifications to make it bullet-proof. If you're running a 2.6 kernel today, you might be surprised to know that you're using SELinux right now! This article explores the ideas behind SELinux and how it's implemented.

Linux dominates the smart TV market, which continues to grow despite concerns over privacy. A Strategy Analytics report pegs Samsung’s Tizen as the leading platform at 21 percent followed by LG’s WebOS at 12 percent. Despite some evidence last year that smart TVs were losing ground to streaming boxes, Strategy Analytics has released a Global […]

While load testing has become more accessible, configuring load tests that faithfully re-create production conditions can be difficult. A good load test must use a set of URLs that are representative of production traffic and achieve request rates that mimic real users. Even performing distributed load tests requires the upkeep of a fleet of servers. read more

This article is a gentle introduction to the Clojure Functional Programming language that is based on LISP, uses the Java JVM and has a handy REPL. And, as Clojure is based on LISP, be prepared to see lots of parentheses!

AWX is an open source web application that provides a user interface, REST API, and task engine for Ansible. It's the open source version of the Ansible Tower. In this tutorial, we will show you basic usage of the Ansible AWX.

I've always been interested in web development and software architecture because I like to see the broader picture of a working system. Whether you are building a mobile app or a web application, it has to be connected to the internet to exchange data among different modules, which means you need a web service. read more

Behavior-driven development is a great way to write tests for code because it uses language that real humans can understand. Once you learn about BDD and its benefits, you may want to implement it in your next project. Let's see how to implement BDD in Drupal using Behat with the Mink extension. read more

Node.js Interactive is the marquee event for Javascript developers, companies that rely on Node.js and the vendors that support both of these constituents with tools, training and other services. Learn moreEvent Title: Node+JS Interactive27 MarLearn more

Follow along with this step-by-step guide to creating your own distribution.

Vanilla is a free, open source discussion forum written in PHP. In this tutorial, we will go through the Vanilla Forum installation and setup on Fedora 29 system by using Nginx as a web server, MySQL as a database server, and optionally you can secure transport layer by using acme.sh client and Let's Encrypt certificate authority to add SSL support.

By running a PostgreSQL database on Kubernetes, you can create uniformly managed, cloud-native production deployments with the flexibility to deploy a personalized database-as-a-service tailored to your specific needs. read more

News briefs for March 28, 2019.

MakeProAudio’s modular, Raspberry Pi based “MPA Platform” lets DIYers assemble professional audio systems ranging from mixers to synth platforms by combining various Tiles and Blocks via network-savvy GLUE control software. MakeProAudio has announced an ambitious MPA Platform for creating — and recreating — professional audio systems out of modular components. The Linux-driven MPA Platform is […]