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Use this script to find a Raspberry Pi on your network

lun, 06/08/2020 - 09:02

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

lun, 06/08/2020 - 09:00

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

lun, 06/08/2020 - 09:00

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

dim, 06/07/2020 - 09:02

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?"

dim, 06/07/2020 - 09:00

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?

sam, 06/06/2020 - 09:02

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

sam, 06/06/2020 - 09:01

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

ven, 06/05/2020 - 09:02

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

ven, 06/05/2020 - 09:01

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

ven, 06/05/2020 - 09:00

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

ven, 06/05/2020 - 09:00

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

jeu, 06/04/2020 - 09:01

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

jeu, 06/04/2020 - 09:00

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

mer, 06/03/2020 - 09:02

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

mer, 06/03/2020 - 09:00

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

mer, 06/03/2020 - 09:00

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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Edge investments, data navigators, and more industry trends

mar, 06/02/2020 - 13:02

As part of my role as a senior product marketing manager at an enterprise software company with an open source development model, I publish a regular update about open source community, market, and industry trends for product marketers, managers, and other influencers. Here are five of my and their favorite articles from that update.


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Control your computer time and date with systemd

mar, 06/02/2020 - 09:02

Most people are concerned with time. We get up in time to perform our morning rituals and commute to work (a short trip for many of us these days), take a break for lunch, meet a project deadline, celebrate birthdays and holidays, catch a plane, and so much more.


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Using pandas to plot data in Python

mar, 06/02/2020 - 09:02

In this series of articles on Python-based plotting libraries, we're going to look at an example of making plots using pandas, the hugely popular Python data manipulation library. Pandas is a standard tool in Python for scalably transforming data, and it has also become a popular way to import and export from CSV and Excel formats.


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Why I switched from Java to Kotlin

mar, 06/02/2020 - 09:01

After years as an educator, I became a professional software developer. That brought me to Java, but recently, I began enjoying a totally different but compatible programming language called Kotlin.


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