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today's leftovers

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  • Signing email with DKIM is becoming increasing mandatory in practice

    There are people who don't like email forwarding, but I can assure them that it definitely happens, possibly still a lot. Unless you want your email not to be accepted by GMail when forwarded, this means you need to DKIM sign it, because forwarded email won't pass SPF (and no, the world won't implement SRS).

  • Weave Cybersecurity into your product design

    How important security is for your application and digital services? “Very important”, this is the answer we get the most often from Product Managers and Executives. Nobody wants the malware to take advantage of the vulnerabilities of their applications. However, any access point to the internet can be an entry point for hackers. Considering the ubiquitous awareness of the importance and risks associated with security, you may expect that security has been well embedded in all the aspects of digital product development, especially in the early stages of product design when costs are comparatively manageable.

    Unfortunately, according to a recent study by MIT, “cybersecurity is rarely considered among the criteria in the early design phase”. This study finds three reasons why this ignorance of cyber security happens in the early stages:

  • Comparing YottaDB Web Framework Performance

    It is interesting to compare the performance of different web stacks and frameworks under simulated stress. To compare apples-to-apples, the database, the JSON string response to a REST query, and front-end load generator were the same.

    Of course, this end-to-end test only involves a single operation. Any real application consists of many operations at different layers in the framework, only a fraction of which are database accesses.

  • The software operator design pattern: advantages – part 4 | Ubuntu

    The software operator is a design pattern. Its design is based on successful applications where this approach was found useful. In other words, it’s a proven approach that can be recommended to others. But like all approaches, it’s important to understand their advantages disadvantages. Software developers need to understand when the application of this pattern leads to a good solution and – perhaps more importantly – when it does not.


    Installing a single application locally is straightforward in most cases. There are app stores and package managers for that. However, installing applications on remote servers is a more tedious task, which becomes more complicated as the number of applications increases. First of all, the login to these machines must be prepared and maintained. But manually maintaining logins does not scale very well. In fact, what is desired is an entity that controls the required provisioning of the machine and performs the required steps. The software operator design pattern, as a dedicated entity, can cover the execution of operational tasks and the remote login, at the same time.

  • systemd-oomd issues on desktop
    I have opened an upstream PR to implement this [1], and it seems
    upstream is OK with the idea in principle, but some more thinking
    needs to be done before it can be merged.
    Assuming we can push that change through upstream, service units will
    immediately benefit because .service files can configure the
    ManagedOOMPreference property. However, applications which are
    launched by gnome-shell or snapd run as transient scope units, which
    means the ManagedOOMPreference property needs to be set when e.g.
    systemd-run is invoked, as demonstrated in the example above. This
    means that a bit of integration work will be needed from snapd,
    gnome-shell, etc. to set ManagedOOMPreference=avoid on _some_
    applications. This immediately raises new questions:
    1. Which services and applications should be given a setting of
    ManagedOOMPreference=avoid by default?
    2. What is the interface to designate such applications? It seems to
    me that we would want to have a "single source of truth" from which
    gnome-shell, snapd, etc. can determine when ManagedOOMPreference=avoid
    should be set.
  • The fight for Init Freedom: Devuan [PDF]

    [...] To start with, systemd is much more than an init system. Rather, as contributor dasein described on the Debian User Forums, “calling systemd an init system is like calling an automobile a cup holder”.

  • AMD publishes the source code for FidelityFX Super Resolution 2 (FSR 2)

    As they promised they would, AMD has now officially published the source code for FidelityFX Super Resolution 2 (FSR 2) under an open source license. With it under the MIT license, developers can pretty much go nuts with it.

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.