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Modding and Programming Leftovers

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  • Keep track of your ride with a custom bike speedometer | Arduino Blog

    Over on element14, Katie had been wanting to go for a short bike ride after finally getting it fixed. But she encountered a problem: the previously mounted speedometer had lost its display unit, meaning the entire thing was now useless. Rather than simply buying a new one, she had the idea to put together a DIY version that relies on GPS instead of counting wheel rotations to keep track of the current speed.

    Component-wise, only a few modules were required to build this device. First was an Arduino Nano 33 IoT that handled communication and power between the screen and GPS module. Next was a GPS3 Click Board, which contains one of Quectel’s L80 GPS modules that provides accurate tracking information in a small form factor. Finally, a small 1.3” circular LCD was chosen due to its pixel density, integrated touch controller, and ease-of-use. Everything was assembled into a custom-designed and 3D-printed housing that fits neatly over the bike’s handlebars and features an area to store a USB battery bank.

  • Miniature line scan smart camera for embedded applications

    It supports the Linux Debian 10 OS and ViewIT software framework from IMAGO. ViewIT handles image acquisition and I/O handling among other tasks. Python, C++ based tools, and Halcon plugins are easy to integrate with the software framework.

  • Analyzing Big Data with grep and awk

    The Cloud has many features of a large, distributed, and very hard to use computer. The Cloud indeed offers to manage storage and compute resources for us. Great! But these gems are hidden behind a mess of APIs and YAML. The Cloud is sadly quite unlike the beautiful simplicity of UNIX.

    What would a “UNIX way” be for such a Cloud computer? UNIX pipelines are a proven way to handle large amounts of data. After all, this approach of streaming through data with simple and composable utilities was designed precisely for the situation where input size greatly exceeds available local memory. Sounds familiar!

  • Parallel Grep and Awk

    Now I’ll use this to do something useful: count the occurrence of each of the $O(10^7)$ features in the training file. I’ll use a map-reduce pattern. In the map phase I’ll run “feature_count.awk” with the following contents.

  • I Summarized 100+ Command-Line Tools for Data Scientists in 15 Minutes

    A command-line interface is a program that processes commands to a computer program in the form of lines of text. In this awesome article, I will introduce 100+ command-line tools used popularly in Data Science.

  • GNU Linux – how to – kvm-qemu port forwarding – how to forward host-port to guest-vm in NAT networking mode

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.