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Style your data plots in Python with Pygal

Tuesday 9th of June 2020 07:02:00 AM

Python is full of libraries that can visualize data. One of the more interactive options comes from Pygal, which I consider the library for people who like things to look good. It generates beautiful SVG (Scalable Vector Graphics) files that users can interact with. SVG is a standard format for interactive graphics, and it can lead to rich user experiences with only a few lines of Python.


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Why I switched from Java to Rust

Tuesday 9th of June 2020 07:01:00 AM

I recently started learning Rust after many years of Java development. The five points that keep coming to mind are:

  1. Rust feels familiar
  2. References make sense
  3. Ownership will make sense
  4. Cargo is helpful
  5. The compiler is amazing

I absolutely stand by all of these, but I've got a little more to say because I now feel like a Rustacean1 in that:


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Get started with open source voice assistant software

Tuesday 9th of June 2020 07:00:00 AM

In my last article, I introduced Mycroft and shared some information about the open source voice assistant project. This article will help you get started with details on key terms, installation, and pairing Mycroft with your devices.


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The latest headless CMS, a new Firefox release, huge leaps in open source audio engineering, and more open source news

Monday 8th of June 2020 07:03:00 AM

In this week’s edition of our open source news roundup, we take a look at the latest Firefox release, a new CMS, huge leaps in open source audio engineering, and more.


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Use this script to find a Raspberry Pi on your network

Monday 8th of June 2020 07:02:00 AM

We've all been there. "I'm going to get this Raspberry Pi to try out. They look kinda cool." And then, like tribbles on an Enterprise, suddenly you have Kubernetes clusters and NFS servers and Tor proxies. Maybe even a hotel booking system!


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A secure and private open source alternative to Alexa

Monday 8th of June 2020 07:00:00 AM

I grew up in rural towns all over Ontario, Canada. We weren't particularly well off, although, as a kid in the middle of nowhere, I wasn't really aware of our socioeconomic status. What I was aware of was this beige box called a computer that sat in my dad's office. Dad worked for the bank, and for his job, it was essential for him to have a computer. So while we never had the latest gaming console, we always had a computer.


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Eliminate spam using SSL with an open source certification authority

Monday 8th of June 2020 07:00:00 AM

MailCleaner is a feature-rich, open source antispam solution. Its virtual appliances (VMs) available for distribution come out-of-the-box with self-signed certificates for both the web interface and the MTA services.

This requires you to supply your own valid, publicly trusted certificate. Using a Let's Encrypt certificate is a great way to accomplish that because it's free, safe, and automated.


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5 ways to boost your Kubernetes knowledge

Sunday 7th of June 2020 07:02:00 AM

When the cloud was still in its formative years, developers discovered that it was convenient to write applications in small, atomic, minimal Linux images that shared resources with the server they ran on. Technically based on kernel namespaces, these small environment definitions came to be called containers. As containers proliferated, sysadmins quickly realized it was becoming essential to develop a tool that could help them manage not only containers but also the virtualized infrastructure underneath.


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Is your team a "glue team?"

Sunday 7th of June 2020 07:00:00 AM

In his book How to Win, New York Times senior economic correspondent Neil Irwin championed the role of "glue people" in bringing about better alignment, collaboration, and organizational maturity.


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What are the pros and cons of virtual events?

Saturday 6th of June 2020 07:02:00 AM

The COVID-19 pandemic disturbed the work of event organizers everywhere. To slow the spread of this highly contagious virus, conferences that tend to host thousands in person faced a choice: Move entirely online, or cancel altogether. Many open source event organizers chose the latter, but not all of them.


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3 charts that show how open source developers think

Saturday 6th of June 2020 07:01:00 AM

Each year, the team at Tidelift asks developers to update us on how they are managing their use of open source dependencies for application development. In June 2019, almost 400 professional software developers responded to our survey with input on "how they use open source software today, what holds them back, and what tools and strategies would help them use it even more effectively."


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A beginner's guide to Kubernetes container orchestration

Friday 5th of June 2020 07:02:00 AM

Last fall, I took on a new role with a team that relies on Kubernetes (K8s) as part of its core infrastructure. While I have worked with a variety of container orchestrators in my time (e.g., Kubernetes, Apache Mesos, Amazon ECS), the job change sent me back to the basics. Here is my take on the fundamentals you should be familiar with if you're working with Kubernetes.


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Provision Kubernetes NFS clients on a Raspberry Pi homelab

Friday 5th of June 2020 07:01:00 AM

Ephemeral containers are useful, but sometimes data needs to persist between containers or be shared among multiple containers. The solution is mounting external volumes inside the containers, and this is done in Kubernetes with persistent volumes. In large, public cloud deployments, Kubernetes has integrations with the cloud providers' block-storage backends, allowing developers to create claims for volumes to use with their deployments, and Kubernetes works with the cloud provider to create a volume and mount it in the developers' pods.


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Reading about open source in French

Friday 5th of June 2020 07:00:00 AM

English speakers have so many wonderful open source resources that it's easy to forget that communications in English aren't accessible to everyone everywhere. Therefore, I've been looking for great open source resources in Spanish and French, so I can recommend them when the need arises.


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Build a Kubernetes cluster with the Raspberry Pi

Friday 5th of June 2020 07:00:00 AM

Kubernetes is an enterprise-grade container-orchestration system designed from the start to be cloud-native. It has grown to be the de-facto cloud container platform, continuing to expand as it has embraced new technologies, including container-native virtualization and serverless computing.


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Improve Linux system performance with noatime

Thursday 4th of June 2020 07:01:00 AM

Whenever I upgrade Linux on my home computer, I have a list of tasks I usually do. They've become habits over the years: I back up my files, wipe the system, reinstall from scratch, restore my files, then reinstall my favorite extra applications. I also make a few system tweaks. I've been making some of these tweaks for so long that I recently wondered if I still needed to do them.


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Using AppImage for Linux package management

Thursday 4th of June 2020 07:00:00 AM

A big part of administrating Linux machines—especially remote machines—is managing and installing software. When something goes wrong with a local application or when something on the filesystem breaks and needs fixing, you're often going to want to push updates without having to travel many miles to sit down in front of a physical screen.


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Code your hardware using this open source RTOS

Wednesday 3rd of June 2020 07:02:00 AM

In general computing, an operating system is software that provides a computer's basic functions. It ensures that a computer detects and responds to peripherals (like keyboards, screens, mobile devices, printers, and so on), and it manages memory and drive space.


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5 common open source testing myths debunked

Wednesday 3rd of June 2020 07:00:00 AM

Open source tools are constantly changing the landscape of testing, and the community around these tools is bigger and more vocal than ever.

The first-ever State of Open Source Testing Survey examines the latest trends and developments across the software development industry. This survey received over 2,000 responses from practitioners across the behavior-driven development, functional testing, and load testing domains.


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Exploring Algol 68 in the 21st century

Wednesday 3rd of June 2020 07:00:00 AM

In the preface to his excellent textbook Algol 68: A First and Second Course, Andrew McGettrick writes:

"This book originated from lectures first given at the University of Strathclyde in 1973-4 to first-year undergraduates, many of whom had no previous knowledge of programming. Many of the students were not taking computer science as their main subject but merely as a subsidiary subject. They, therefore, served as a suitable audience on whom to inflict lectures attempting to teach Algol 68 as a first programming language."


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More in Tux Machines

Screencasts and Audiocasts: Neptune OS 6.5, GNU World Order, Python

  • Neptune OS 6.5 Run Through

    In this video, we are looking at Neptune OS 6.5. Enjoy!

  • GNU World Order 362

    **Gutenprint**, **HPLIP**, and **htop** from Slackware software set AP.

  • Talk Python to Me: #272 No IoT things in hand? Simulate them with Device Simulator Express [Roy: "Talk Python to Me" appears to be boosting Microsoft monopolists and proprietary software again]

    Python is one of the primary languages for IoT devices. With runtimes such as CircuitPython and MicroPython, they are ideal for the really small IoT chips. Maybe you've heard of the Circuit Playground Express, BBC micro:bit, or the fancy Adafruit CLUE. They aren't too expensive (ranging from $25 to $50 each). But for large groups such as classrooms, this can be a lot of money. Moreover, getting your hands on these devices can sometimes be tricky as well.

today's howtos

Olimex Tukhla High-End Open Source Hardware NXP i.MX 8QuadMax SBC in the Works

Most open-source hardware Arm Linux SBCs are optimized for cost, and there are few higher-end boards with extensive connectivity designed for professionals. Beagleboard X15 would be one of the rare examples currently available on the market, but it was launched five years ago. One European company noticed the void in this market and asked Olimex to develop a high-end open-source Linux board with a well-documented processor. They ruled out RK3399, and instead went Olimex Tukhla SBC will be powered by NXP i.MX 8QuadMax, the top processor of i.MX 8 family with two Cortex-A72 cores, four Cortex-A53 cores, and two real-time Cortex-M4F cores. Read more

Robotics Recap: Learning, Programming & Snapping ROS 2

Robotics@Canonical puts a strong focus on the migration from ROS to ROS 2. ROS 2 benefits from many improvements, especially robot security. Our goal is to make it easy for you to transition to ROS 2, whether you’re completely new to ROS or a seasoned engineer retooling for a new environment. Your new platform should be secure-by-default, and we expect you’ll need to pivot between different environments as you migrate from ROS to ROS 2. Along the way we’ve encountered some friction points, some mild surprises, and some opportunities to better leverage existing tools. Whenever that happened we tried to fix them and share our experiences so you didn’t run into the same problems! This has resulted in blog posts and videos in three key focus areas: getting started with ROS 2, software development in ROS 2, and building snaps for ROS. Let’s recap some of our recent output. Read more