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Programming: AWK, Raspberry Pi, Python and CloudBees

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Development
  • Another surprising AWK trick

    So why is AWK ignoring everything but the numbers in returning "626"? Because "Strings are converted to numbers and numbers are converted to strings, if the context of the awk program demands it". In this case AWK is told to subtract field 3 from field 2. Subtraction being a numbers operation, AWK treats the strings in the fields as numbers, and since " lid" and ")" aren't numbers, they're ignored.

  • Interactive (Touch) Musical Christmas Tree

    In this video I should how to build a capacitive touch Christmas tree that allows you to play music just by touching the ornaments. All it takes is a little bit of Python code, a Raspberry Pi, and a Bare Conductive Pi Cap.

  • How Machine Learning Will Generate up to $2 Trillion in Value for the Manufacturing Industry

    Open-Source Technologies Provide Innovative Solutions

    With the right skill set, data scientists in the manufacturing industry can provide a strategic advantage by implementing the use cases discussed here using Python and cutting edge open-source libraries like TensorFlow, scikit-learn, and scikit-image. For this reason, many manufacturing organizations would realize greater value from an enterprise machine learning platform that incorporates open-source libraries and tools rather than a point solution designed for a single use case.

  • Significant changes for some error messages in Python 3.8

    As I work on including more exceptions in Friendly-traceback, I am mostly pleasantly surprised by generally more precise error messages. For example, in Python 3.7, the following

    __debug__ = 1

    would yield "SyntaxError: assignment to keyword" which likely would baffle almost everyone looking up the list of Python keywords. In Python 3.8, that message has been replaced by the more precise: "SyntaxError: cannot assign to __debug__". Much better, in my opinion, even though one may be surprised to learn about this constant.

  • SunPy Receives NASA Grant, Helps Generate Parker Solar Probe Results

    The one-year proposal, entitled “Supporting and extending SunPy for the heliophysics community,” will create a spectral datatype and provide more coordinate systems in SunPy. In addition, code snippets demonstrating the use of SunPy and other heliophysics-focused Python packages will also be created. Finally, an extensive analysis of the codebase will be performed in order to improve SunPy’s long-term maintainability. The PI is Jack Ireland (NASA GSFC), and the co-I is Andy Terrel (NumFOCUS). In addition, two SunPy affiliated packages were selected for funding from the same NASA program.

    [...]

    A co-author on one of the results papers, David Stansby, previously published a short paper called “Predicting Large-scale Coronal Structure for Parker Solar Probe Using Open Source Software.” That short paper provided a completely open toolkit (pfsspy), built on the NumFOCUS stack, to make predictions of the Sun’s magnetic field structure. One of the key results presented in the new Nature paper grew directly out of this work, which relies heavily on SunPy, NumPy, SciPy, and Matplotlib.

  • The Apache Software Foundation Welcomes CloudBees as its Newest Targeted Sponsor at the Platinum Level

    The Apache® Software Foundation (ASF), the all-volunteer developers, stewards, and incubators of more than 350 Open Source projects and initiatives, announced today that CloudBees has become an ASF Targeted Sponsor at the Platinum level.

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.