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Programming Leftovers

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Development
  • How to test PHP code using PHPUnit - Anto ./ Online

    PHPUnit automatically executable tests that verify your application’s behavior. Thus – you can ensure that your changes don’t break existing functionality. This post will show you how to test your PHP code using PHPUnit.

  • Latency Numbers Every Team Should Know

    We design systems around the size of delays that are expected. You may have seen the popular table “latency numbers every programmer should know” which lists some delays that are significant in technology systems we build.

    Teams are systems too. Delays in operations that teams need to perform regularly are significant to their effectiveness. We should know what they are.

    Ssh to a server on the other side of the world and you will feel frustration; delay in the feedback loop from keypress to that character displayed on the screen.

    Here’s some important feedback loops for a team, with feasible delays. I’d consider these delays tolerable by a team doing their best work (in contexts I’ve worked in). Some teams can do better, lots do worse.

    [...]

    In recent times you may have experienced the challenge of having conversations over video links with significant delays. This is even harder when the delay is variable. It’s hard to avoid talking over each other.

    Similarly, it’s pretty bad if we know it’s going to take all day to deploy a change to production. But it’s so worse if we think we can do it in 10 minutes, when it actually ends up taking all day. Flaky deployment checks, environment problems, change conflicts create unpredictable delays.

    It’s hard to get anything done when we don’t know what to expect. Like trying to hold a video conversation with someone on a train that’s passing through the occasional tunnel.

  • How I programmed a virtual gift exchange

    Every year, my wife's book club has a book exchange during the holidays. Due to the need to maintain physical distance in 2020, I created an online gift exchange for them to use during a book club videoconference. Apparently, the virtual book exchange worked out (at least, I received kind compliments from the book club members), so I decided to share this simple little hack.

  • Dirk Eddelbuettel: prrd 0.0.4: More tweaks

    The key idea of prrd is simple, and described in some more detail on its webpage and its GitHub repo. Reverse dependency checks are an important part of package development that is easily done in a (serial) loop. But these checks are also generally embarassingly parallel as there is no or little interdependency between them (besides maybe shared build depedencies). See the (dated) screenshot (running six parallel workers, arranged in split byobu session).

    This release brings several smaller tweaks and improvements to the summary report that had accumulated in my use since the last release last April. We also updated the CI runners as one does these days.

  • vrurg: A New Release Of Cro::RPC::JSON

    I don’t usually announce regular releases of my modules. But not this time. I start this new year with the new v0.1 branch of Cro::RPC::JSON. Version 0.1.1 is currently available on CPAN (will likely be replaced with fez as soon as it is ready). The release is a result of so extensive changes in the module that I had to bump its :api version to 2.

  • gfldex: Anonymous slurpers

    I have a script where I’m only interested in the last two lines of its output.

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.