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today's howtos

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  • My pragmatic sysadmin view on subdomains and DNS zones

    This question is interesting to me because I had a completely different view of it than Julia Evans did. For me, NS and SOA DNS records are secondary things when thinking about subdomains, down at the level of the mechanical plumbing that you sometimes need. This may surprise people, so let me provide a quite vivid local example of why I say that.

  • An Exploration of JSON Interoperability Vulnerabilities

    JSON is the backbone of web application communications. The simplicity of JSON is often taken for granted. We don't usually consider JSON parsing as part of our threat model. However, in our modern, multi-language, microservice architectures, our applications often rely on several separate JSON parsing implementations, each of which has its own quirks.

    As we've seen through attacks like HTTP request smuggling, discrepancies across parsers combined with multi-stage request processing can introduce serious vulnerabilities. In this research, I conducted a survey of 49 JSON parsers, cataloged their quirks, and present a variety of attack scenarios and Docker Compose labs to highlight their risks. Through our payment processing and user management examples, we will explore how JSON parsing inconsistencies can mask serious business logic vulnerabilities in otherwise benign code.

  • Hardware RAID on the Raspberry Pi CM4

    After a long and arduous journey involving multiple driver revisions and UART debugging on the card, I was able to bring up multiple hardware RAID arrays on the Pi.

  • The Tao of Continuous Integration

    It is a truism in modern software development that a robust continuous integration (CI) system is necessary. But many projects suffer from CI that feels brittle, frustrates developers, and actively impedes development velocity. Why is this? What can you do to avoid the common CI pitfalls?

  • Install Kali Linux on Chromebook: Tips and Tutorials

    If you need more system privileges on your Chromebook, Kali Linux might be right for you, especially since Linux is free and open-source. But remember that this operating system is mainly for penetration testing and not very convenient for daily work.

  • How to install the Foxit reader on Linux

    The Foxit Reader is free PDF software for Linux, Mac, and Windows. It is open-source software. With it, users can create as well as annotate and collaborate with PDF files. Here’s how to install it on Linux.

  • How To Install Git on Manjaro 20 - idroot

    In this tutorial, we will show you how to install Git on Manjaro 20. For those of you who didn’t know, Git is a distributed version control system. Git is a free software designed to handle everything from small to very large projects with speed and efficiency. It can be easy to learn and used for tracking changes in source code during software development. Git has the features of data integrity, non-linear workflows, and fast performance.

    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 through the step-by-step installation of Git on a Manjaro 20 (Nibia).

  • How to manage Flatpak permissions graphicly?

    Finding difficulties to manage Flatpak permissions using command lines? Maybe you should give Flatseal a try.

    The main purpose of Flatpak is to provide a centralized service for distributing applications. But while Penguin users enjoy the taste of updated and secured Linux apps, they have hard time managing Flatpak permissions for the lack of graphical front-end which helps them do so.

    Here the important of the Flatsealutility, which developed by the enthusiast engineer Martin Abente Lahaye, appears.

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today's leftovers

  • What is Raspberry Pi 4 “Model B”? [Ed: I'm still waiting for them to formally apologise for going behind customers' backs, making secret deals with Microsoft to put Microsoft malware on all those devices]

    Raspberry Pi has conquered the world of SoC (System on a Chip). It has already garnered millions of followers since its release in 2012. Not only is it inexpensive, but it’s also versatile, modular, and multi-purpose. It has become popular not only as a credit-sized computer board but also as a controller in electronic, robotics, and IoT projects. The size, features, and price drive the popularity of the Pi, especially in the DIY community. To keep up with the current technological trends, the tiny board has undergone plenty of upgrades over the years, and there have been many varieties so it can cater to the needs and demands of its users. In 2019, the Raspberry Pi Foundation released the fourth generation of the multi-purpose board, the Raspberry Pi 4 B. It is the most powerful Pi to date, sporting huge upgrades from its predecessors. The compact board is touted to deliver a PC-level performance, and it didn’t disappoint.

  • Kentaro Hayashi: Grow your ideas for Debian Project

    There may be some "If it could be ..." ideas for Debian Project. If idea is concreate and worth to make things forward, it should make a proposal for Project Funding. [...] I'm not confident whether mechanism works, but Debian needs change.

  • Sam Thursfield: Calliope, slowly building steam

    There are some interesting complexities to this, and in 12 hours of hacking I didn’t solve them all. Firstly, Bandcamp artist and album names are not normalized. Some artist names have spurious “The”, some album names have “(EP)” or “(single)” appended, so they don’t match your tags. These details are of interest only to librarians, but how can software tell the difference? The simplest approach is use Musicbrainz, specifically cpe musicbrainz resolve-ids. By comparing ids where possible we get mostly good results. There are many albums not on Musicbrainz, though, which for now turn up as false positives. Resolving Musicbrainz IDs is a tricky process, too — how do we distinguish Multi-Love (album) from Multi-Love (single) if we only have an album name? If you want to try it out, great! It’s still aimed at hackers — you’ll have to install from source with Meson and probably fix some bugs along the way. Please share the fixes!

  • Neovide Is A Graphical Neovim Client Written In Rust

    Neovide is a really cool GUI client for Neovim. Although it essentially functions like Neovim in the terminal, Neovide does add some nice graphical improvements such as cursor animations and smooth scrolling. It even has me thinking about making it my new "vim" alias.

Linux 5.11.13, 5.10.29, 5.4.111, 4.19.186, 4.14.230, 4.9.266, and 4.4.266

Get involved with Mageia, become a Packager

With Mageia 8 just released and development for Mageia 9 getting underway in Cauldron, the unstable branch of Mageia, now is a great time to get involved with packaging. We are starting to look at the features that we want to include for Mageia 9, and as it is so early in the development cycle, now is the time for major developments, or big updates to key pieces of software. This is a great time to join the project as you can propose features you would like to see, help to implement large changes or see how a distribution evolves through development, stabilisation and then is released. If there is an application that you are interested in, if you want to help maintain part of the distribution, or if you want to learn something new, there are many opportunities to do so with the packaging team. Read more

Google does not want you to tell your players about your donation page

I recently updated Pixel Wheels banner image on Google Play. That triggered a review of the game: shortly after the update I received a message telling me Pixel Wheels was "not compliant with Google Play Policies". What nefarious activity does the game engage in? Sneak on users? Mine bitcoins? [...] Meanwhile you can still get the game from F-Droid or, since they do not have a problem with a link to a donation page. Read more