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Programming Leftovers

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Development
  • Create a shared library in C with CMake - PragmaticLinux

    This tutorial explains how to develop a shared library in the C programming language and how to generate its build environment with CMake.

  • Some things about getaddrinfo that surprised me

    To understand all of these, we need to learn about a function called getaddrinfo which is responsible for doing DNS lookups.

    There are a bunch of surprising-to-me things about getaddrinfo, and once I learned about them, it explained a bunch of the confusing DNS behaviour I’d seen in the past.

  • announcing zephyr-copilot

    I recently learned about the Zephyr Project which is a rather neat embedded OS for devices too small to run Linux.

    This led me to wondering if I could adapt arduino-copilot to target Zephyr, and so be able to program any of the 350+ boards it supports using Haskell.

    At the same time I had an opportunity to give a talk at the Houston Functional Programmers group. On February 1st I decided to give that talk, about arduino-copilot.

  • How long does it take to create a website? (and why your FLOSS project doesn’t need one) – The Open Sourcerer

    One might wonder why then, with those upgraded skills, I didn’t seize the opportunity to make a new website for GTG or other open-source projects that could benefit from fancier marketing.

    The short answer is, even if my tooling and technique have improved, it’s still a metric crapton of work. It might seem easy (“Use Hugo!”, “Just slap a couple of pages together!”, etc.) but there’s much more to building a website than just the technical design and coding (or integration) aspects. This article provides you with an idea of the amount of time it takes to plan, write, design and build a “reasonably simple” website with a dozen pages or so.

  • Finding Unused Perl Variables - olafalders.com

    I’ve been working on some linting projects at $work and one thing I’m working on is finding unused variables in our codebase. This can be pretty important in a larger codebase. When you find variables which have not been used, you may find yourself asking, “why is this here?” and you may not easily get an answer. Eliminating unused variables can be good for the performance of the code, but also good for everyone else on your team. So, we want to make sure we can remove old bits of unused code and also prevent new cases.

    One tool we have used for this is Test::Vars. It has some limitations (like it needs to be in a file with a package declaration) and it has some bugs, but it does find some unused variables as well.

More in Tux Machines

digiKam 7.7.0 is released

After three months of active maintenance and another bug triage, the digiKam team is proud to present version 7.7.0 of its open source digital photo manager. See below the list of most important features coming with this release. Read more

Dilution and Misuse of the "Linux" Brand

Samsung, Red Hat to Work on Linux Drivers for Future Tech

The metaverse is expected to uproot system design as we know it, and Samsung is one of many hardware vendors re-imagining data center infrastructure in preparation for a parallel 3D world. Samsung is working on new memory technologies that provide faster bandwidth inside hardware for data to travel between CPUs, storage and other computing resources. The company also announced it was partnering with Red Hat to ensure these technologies have Linux compatibility. Read more

today's howtos

  • How to install go1.19beta on Ubuntu 22.04 – NextGenTips

    In this tutorial, we are going to explore how to install go on Ubuntu 22.04 Golang is an open-source programming language that is easy to learn and use. It is built-in concurrency and has a robust standard library. It is reliable, builds fast, and efficient software that scales fast. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel-type systems enable flexible and modular program constructions. Go compiles quickly to machine code and has the convenience of garbage collection and the power of run-time reflection. In this guide, we are going to learn how to install golang 1.19beta on Ubuntu 22.04. Go 1.19beta1 is not yet released. There is so much work in progress with all the documentation.

  • molecule test: failed to connect to bus in systemd container - openQA bites

    Ansible Molecule is a project to help you test your ansible roles. I’m using molecule for automatically testing the ansible roles of geekoops.

  • How To Install MongoDB on AlmaLinux 9 - idroot

    In this tutorial, we will show you how to install MongoDB on AlmaLinux 9. For those of you who didn’t know, MongoDB is a high-performance, highly scalable document-oriented NoSQL database. Unlike in SQL databases where data is stored in rows and columns inside tables, in MongoDB, data is structured in JSON-like format inside records which are referred to as documents. The open-source attribute of MongoDB as a database software makes it an ideal candidate for almost any database-related project. This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of the MongoDB NoSQL database on AlmaLinux 9. You can follow the same instructions for CentOS and Rocky Linux.

  • An introduction (and how-to) to Plugin Loader for the Steam Deck. - Invidious
  • Self-host a Ghost Blog With Traefik

    Ghost is a very popular open-source content management system. Started as an alternative to WordPress and it went on to become an alternative to Substack by focusing on membership and newsletter. The creators of Ghost offer managed Pro hosting but it may not fit everyone's budget. Alternatively, you can self-host it on your own cloud servers. On Linux handbook, we already have a guide on deploying Ghost with Docker in a reverse proxy setup. Instead of Ngnix reverse proxy, you can also use another software called Traefik with Docker. It is a popular open-source cloud-native application proxy, API Gateway, Edge-router, and more. I use Traefik to secure my websites using an SSL certificate obtained from Let's Encrypt. Once deployed, Traefik can automatically manage your certificates and their renewals. In this tutorial, I'll share the necessary steps for deploying a Ghost blog with Docker and Traefik.