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Programming Leftovers

Submitted by Roy Schestowitz on Sunday 11th of April 2021 11:14:24 PM Filed under
Development

  • Claudio Cambra: On finishing Season of KDE: improving Kirigami docs

    I wrote my first Season of KDE blog-post 3 months ago… and have since forgotten to write any updates. It’s time to address that!

    Since January, I’ve been working mainly on improving the documentation for Kirigami. Back then, the Develop wiki had some pages teaching newcomers how to create a Kirigami application, but these were a little disjointed and didn’t really lead readers towards any specific goal.

    There were also a lot of aspects and components of Kirigami that weren’t properly documented. Some of the existing materials also needed revising in terms of style, structure, and clarity.

  • Getting Started With MicroPython on the Raspberry Pi Pico

    The Raspberry Pi Pico is the first microcontroller-based development board from the Raspberry Pi Foundation. Instead of the Linux operating system found on other Raspberry Pi boards, the Pico must be attached to another computer to program it.

    Microcontroller programming is a difficult subject to learn, but luckily the Raspberry Pi foundation has made it easy to get up and running with the Pico. Today you'll learn how to install all the tools needed to get started with the Raspberry Pi Pico.

    These instructions focus on Windows, but Linux and Mac installation are very similar, just make sure to get the tools for your operating system instead.

  • Calculating EV battery charge pricing with Perl

    Presently I have great interest in “EVs” Electric Vehicles but I haven’t seen any data on how much it would cost to charge an electric vehicle from 0 % to 100 % battery charge at home in NYC ( So I wrote a Perl script to do just that ) but before we dig in into it I explain a few things about Electric Vehicles.

    Electric Vehicles will have a battery capacity that is represented by kilowatt-hour units or kWh for short.

    An EV’s driving range is represented in miles units ( In the US ) and the average mileage is determined by the EPA battery range rating ( the bigger the battery capacity usually means the more driving range you will have in a car ) after conducting a few tests ( so in reality your mileage will vary ).

    Electric vehicles have an onboard charger which determines its charging rate in Kilowatt per Hour and it varies by car makers. Most EV car owners will install a Level 2 charger that is usually capable of charging cars up to 7.2 kWH rate using 220 volt electric circuit with 32 amps of power ( but there are chargers that can go at a higher rate ).

    Ok now that I explained a few things lets dig into the data used to make my script.

    I checked my electric bill and found that my electricity rate in NYC is $0.13 cents per kWh.

    For comparison I phoned a friend in Florida to get electricity rates where he lives which is $ 0.07 cents per kWh. ( Almost half of NY rate )

  • How to Install and Use Ruby on Linux Distributions

    Ruby is one of the most used and easy to use programming languages. Ruby is an open-source, object-oriented interpreter that can be installed on a Linux system. Many programmers prefer Python over Ruby to start learning basic programming, but Ruby can handle large web-frameworks and web applications. Once you start learning Ruby, you would find it less machine-like and not repetitive. If you’re confused between Ruby and Ruby on Rails, I must mention that they are not the same; Ruby is a programming language; on the other hand, Ruby on Rails is a web framework.

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Dilution and Misuse of the "Linux" Brand

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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.

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