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Programming Leftovers

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Development

  • Interacting with the Pootle Bot on Gerrit

    Have you received “A polite ping, still working on this bug?” message on one of your Gerrit submissions? You can simply send an arbitrary reply to avoid the patch being abandoned within a month. Here we discuss more about Pootle bot, which is one of the QA (Quality Assurance) tools for the LibreOffice QA team to manage old submissions.

  • Optimizing your QML application for compilation to C++

    This is the start of a series of posts where I'm going to share some insights on how to adjust a QML application to get the most out of qmlsc, the QML Script Compiler. In contrast to previous posts, I won't talk about the abstract architecture or the high level picture.

  • Compiling QML to C++: Annotating JavaScript functions

    This is the second installment in the series on how to adjust your QML application to take the maximum advantage of qmlsc. In the first post we've set up the environment and taken an initial measurement. I highly recommend reading that one first.

  • PaloAlto init-cfg.txt Bootstrap Config file Layout with Examples

    When you install and configure the PaloAlto firewall, when the firewall boots up for the first time, it does the bootstrapping process. PaloAlto uses the settings defined in the bootstrap files, including the init-cfg.txt and bootstrap.xml under the config folder to configure the initial state of the firewall.

  • $30 compact multi-sensor board works with any microcontroller with I2C (Crowdfunding) - CNX Software

    SENSE is a compact multi-sensor board supporting measurement of air quality, sound, light intensity, temperature, proximity, etc… and designed by Zack Seifert, a seventeen-year-old electronics enthusiast and president of his school’s robotics team.

  • I will just quickly do a blog post...

    I got ”inspired” by my writing of the previous blog post, and wrote in a channel about my experience some time ago. So why not also do a blog post about doing a blog post Smile

    So… I was planning to use GitLab’s Pages feature via my Hugo fork as usual to push it through. So like, concentrate on writing and do a publish, right, like in good old times? I did so, but all I got both locally and in remote pipeline was stuff like…

  • Rust: A Critical Retrospective

    Since I was unable to travel for a couple of years during the pandemic, I decided to take my new-found time and really lean into Rust. After writing over 100k lines of Rust code, I think I am starting to get a feel for the language and like every cranky engineer I have developed opinions and because this is the Internet I’m going to share them.

    The reason I learned Rust was to flesh out parts of the Xous OS written by Xobs. Xous is a microkernel message-passing OS written in pure Rust. Its closest relative is probably QNX. Xous is written for lightweight (IoT/embedded scale) security-first platforms like Precursor that support an MMU for hardware-enforced, page-level memory protection.

    In the past year, we’ve managed to add a lot of features to the OS: networking (TCP/UDP/DNS), middleware graphics abstractions for modals and multi-lingual text, storage (in the form of an encrypted, plausibly deniable database called the PDDB), trusted boot, and a key management library with self-provisioning and sealing properties.

    One of the reasons why we decided to write our own OS instead of using an existing implementation such as SeL4, Tock, QNX, or Linux, was we wanted to really understand what every line of code was doing in our device. For Linux in particular, its source code base is so huge and so dynamic that even though it is open source, you can’t possibly audit every line in the kernel. Code changes are happening at a pace faster than any individual can audit. Thus, in addition to being home-grown, Xous is also very narrowly scoped to support just our platform, to keep as much unnecessary complexity out of the kernel as possible.

  • Huang: Rust: A Critical Retrospective

    Andrew 'bunnie' Huang has posted an extensive review of the Rust language derived from the experience of writing "over 100k lines" of code.

  • This Week In Rust: This Week in Rust 443
  • Caolán McNamara: Dark Style Preference with GTK

    Added something to track the org.freedesktop.appearance.color-scheme property as used by the GNOME 42 Dark Style Preference setting. Screencast recorded with the new iteration of GNOME's screen built-in recorder which is quite snazzy.

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.