Linux-Systeme, Betrieb, Sicherheit, Backups und Fehlersuche.
I recently went through a surprisingly long debugging journey with Nextcloud Office on a Rocky Linux 10 server. The goal sounded simple: Open and edit .ods, .xlsx, .docx, and other office files directly in the browser from Nextcloud, similar to the experience you get with Microsoft 365 or OnlyOffice. The actual result at the beginning…
When using a single external monitor with multiple HDMI sources, things can get awkward quickly. In my setup, the monitor is connected to two machines: Switching the monitor input from Arch to the Windows laptop worked perfectly. Windows immediately used the external monitor. But switching back to the Arch workstation often resulted in a black…
Introduction Arch Linux and CachyOS are closely related, but they are not the same kind of distribution. Arch Linux is an independently developed, minimalist, rolling-release Linux distribution for x86-64 systems. Its philosophy is centered around simplicity, user control, and building your own system from a minimal base. The official Arch description says that Arch is…
Introduction A practical, production-ready setup for SSH, Postfix, Dovecot and HTTPD — plus monitoring & reporting scripts Rocky Linux 10 continues the RHEL tradition of being a stable, long-term server operating system. But stability alone does not equal security. Any internet-exposed server will face constant brute-force attacks — especially on SSH, mail services and web…
Fixing the Persistent Postfix Error: “process was started with ulimit -f limit” on Rocky Linux If you’re running Postfix with Dovecot on Rocky Linux and keep seeing the error: process was started with ulimit -f limit even after adjusting system limits, you’re not alone. This issue is surprisingly persistent and often misunderstood. The root cause…
Introduction Postfix, Dovecot, Rspamd, DKIM & ARC — Done Right Running your own mail server is still one of the most demanding infrastructure tasks. Modern mail delivery is no longer just SMTP — it is a trust pipeline involving SPF, DKIM, DMARC, ARC, reputation systems, content scanning, and strict authentication rules. In this post we…
Introduction When people ask how “independent” a Linux distribution is, they usually mean much more than open-source purity. In 2025, independence also touches on questions such as: This article provides a detailed, realistic analysis of how independent Arch Linux and other major Linux distributions are—and introduces the few rare distros intentionally designed to operate outside…
Introduction Arch Linux is beloved for its minimalism and control—but that also means you’re often on your own when it comes to setting up essentials like Wi-Fi. Whether you’re bootstrapping a fresh install or configuring your Hyprland-powered desktop, this guide walks you through connecting to WLAN via the command line, GUI tools, and even WPS….
Introduction In this post, we’ll go from zero to running a custom .NET IoT application on the latest Raspberry Pi 5, built with the power of Yocto Linux. We’ll write the application in C# with .NET, build a minimal image with Yocto, deploy and run the app — and then reimplement the same logic in…
Using the Vivaldi browser on Arch Linux with a Wayland compositor like Hyprland can be an adventure, especially if you’re using an NVIDIA GPU. As someone running a NVIDIA 3080, I’ve spent countless hours troubleshooting flickering issues when trying to get Vivaldi running smoothly. Finally, after a lot of trial and error, I found the…
Why .NET together with arch linux is a top development platform With the release of .NET 9, Microsoft’s latest iteration of their cross-platform framework has introduced several improvements, including more streamlined deployment options. If you’re working in an Arch Linux environment, creating a robust, custom systemd service using .NET can be straightforward and versatile. In…
Bash versus zsh. Pros and cons of two famous shells on linux For Arch Linux users, the choice of shell can influence productivity, efficiency, and even the learning curve of day-to-day tasks. Bash (Bourne Again Shell) and Zsh (Z Shell) are two of the most popular shells, each with distinct features, advantages, and potential drawbacks….
Hyprland is an emerging Wayland compositor that has garnered significant attention in the Linux desktop ecosystem. Designed for advanced users and those seeking maximum customization, Hyprland is a modern, feature-packed compositor built with dynamic tiling and window management in mind. At its core, Hyprland aims to offer a superior user experience for those wanting to…
Bing’s “Image of the Day” often features stunning and inspiring images from around the world, making it a perfect choice for your desktop wallpaper. In this guide, we’ll walk you through a simple Bash script that automatically downloads the Bing image of the day in the highest quality and saves it with a filename that…
In the world of data management, ensuring that you have adequate backups while maintaining efficient use of storage is crucial. For users of Timeshift on Arch Linux, this balance can become challenging as snapshot data grows over time. In this blog post, we’ll explore an effective purge strategy to manage Timeshift snapshots, coupled with a…
In today’s digital age, ensuring the integrity and availability of your data is paramount. Virtual machines (VMs) have become a cornerstone in many IT environments due to their flexibility and efficiency. However, like any other critical system, they need to be backed up regularly to prevent data loss, ensure business continuity, and maintain system integrity….
Creating a RESTful API in C is a bit unconventional compared to modern languages like Python or JavaScript, but it’s a great way to dive deep into the mechanics of web servers and APIs. This post will guide you through implementing a simple airline API in GNU C on an Arch Linux host and show…
In this post, we’ll go through the steps to create a network bridge br0 on an Arch Linux system, linking it to the physical Ethernet interface enp6s0. We will also set up a systemd service to handle the creation and removal of the bridge on demand, ensuring that the network configuration remains consistent using NetworkManager….
Windows updates can sometimes overwrite the existing bootloader, leaving you without a way to boot into your Linux installation. If you have a dual-boot setup with Arch Linux and Windows 11, and a Windows update has removed your Linux bootloader, you can restore it using a bootable Arch Linux USB drive. This guide will take…
As our upgrade article had a lot of attention, we also would like to document the upgrade process for php from version 8.1 to the supported version 8.2. Please keep in mind that although this is the currently supported version do not forget to check the compatibility of this version with the applications that you…
Admittedly, the title of this article is very abstruse. But I would like to take this opportunity to promote a really great project, namely Hyprland under arch linux! We have been using this software on our workstations for some time now and are really very satisfied. We also use the actually unsupported setup with NVidia…
Introduction: The Linux kernel, the heart of the Linux operating system, is an open-source marvel that embodies collaboration, innovation, and constant evolution. In this blog post, we will take a deep dive into the Linux kernel development process, explore the key contributors involved, outline the benefits of this collaborative effort, and present a short and…
Introduction Red Hat Enterprise Linux (RHEL) has long been a preferred choice for businesses seeking a stable, secure, and feature-rich operating system. However, with recent changes in its commercial offerings and the introduction of CentOS Stream, alternatives like Rocky Linux and AlmaLinux have emerged to fill the void left by CentOS. In this blog post,…
Introduction The command line interface (CLI) has been a pivotal tool for developers, system administrators, and power users for decades. Despite its powerful capabilities, the traditional terminal emulator lacks certain features and can appear bland. However, a new wave of terminal emulators has emerged, transforming the command line experience on Linux and macOS. In this…
PHP is one of the most popular and widely used programming languages for web development. It offers many features and benefits, such as: However, PHP is also constantly evolving and improving, which means that new versions are released regularly. These new versions introduce new features, fix bugs, and enhance performance and security. Therefore, it is…
Hyprland is a dynamic tiling Wayland compositor based on wlroots that provides the latest Wayland features, is highly customizable, has all the eyecandy, the most powerful plugins, easy IPC, much more QoL stuff than other wlr-based compositors and more 12. It is written in C++ and offers dynamic tiling, tabbed windows, a clean and readable…
Kernel Version The choice of kernel version depends on your requirements. If you prioritize stability over the latest features, you can opt for the long-term support (LTS) kernel. The LTS kernel is updated less frequently than the default kernel, but it is considered more stable 12. However, it may not be compatible with newer hardware…
Introduction Operating systems are the backbone of modern computing. They are responsible for managing hardware resources and providing a platform for software applications to run. In this blog post, we will compare two popular operating systems: Linux and Windows 11. We will discuss the differences between these two operating systems and provide guidance on which…
The nextcloud client sync is a popular tool used to synchronize files between multiple devices. However, running the client on multiple corporate machines can cause the IP addresses of those machines to be blocked on the corporate server running crowdSec. This can happen even if the nextcloud URLs are whitelisted. In such cases, the app.crowdsec.net…
Introduction In a rapidly evolving technological landscape, adaptability is the key to staying ahead. Microsoft, a company known for its long-standing commitment to the Windows operating system, is now expanding horizons by providing users with installation instructions on how to download and install Linux. This initiative isn’t about replacing Windows; it’s about empowering users to…
Introduction Over time, an Arch Linux system can accumulate build artifacts, temporary files, and unnecessary clutter that may consume valuable disk space and slow down your system. To keep your Arch Linux installation running smoothly and maintain a lean system, it’s essential to perform regular maintenance by cleaning up these build artifacts. In this blog…
In the world of Linux firewall management, a significant shift has occurred in recent years with the adoption of nftables as the next-generation packet filtering framework. On Rocky Linux, a popular distribution known for its stability and security features, transitioning from iptables to nftables is not only beneficial but also aligns your system for the…
Open Broadcaster Software (OBS) Studio is a powerful and versatile tool for recording and live streaming. If you’re an Arch Linux user and want to capture your screen or create engaging content, OBS Studio is an excellent choice. In this guide, we’ll walk you through the process of installing OBS Studio on an Arch Linux…
Introduction Arch Linux is a versatile and customizable Linux distribution known for its simplicity and flexibility. One of the key aspects of managing an Arch Linux system is installing and removing software efficiently. In this blog post, we will explore how to do just that using the „yay“ command, a popular AUR (Arch User Repository)…
Introduction Network performance testing is a crucial aspect of maintaining and optimizing your network infrastructure. Whether you’re a system administrator, a network engineer, or just a curious user, understanding how to measure network performance can help you identify and resolve issues, ensure your network meets its requirements, and plan for future scalability. In this blog…
Arch Linux is known for its simplicity, customization, and DIY approach. While many Linux enthusiasts enjoy building their systems from the ground up, the installation process can be daunting for newcomers. Luckily, Arch Linux provides the Archinstall.sh script, a user-friendly installer that streamlines the process. In this guide, we’ll walk you through installing Arch Linux…
In the ever-evolving landscape of digital technology, safeguarding your system’s integrity and data is paramount. Unforeseen disasters or system failures can strike at any time, potentially leading to the loss of valuable information and countless hours of work. Fortunately, Clonezilla, a powerful open-source disk cloning and imaging software, offers a robust solution for securing and…
In the world of Linux, system stability and data integrity are paramount. Unexpected issues can arise at any time, jeopardizing your work, settings, and valuable files. To protect your Linux system effectively, it’s essential to have a reliable backup and restore solution in place. One such tool that stands out is Timeshift. In this comprehensive…
In today’s digital age, data is a valuable asset that we cannot afford to lose. Whether it’s important documents, cherished memories in the form of photos and videos, or critical system configurations, having a reliable backup strategy is essential. One robust solution for efficient data backup on Linux systems is BorgBackup. Why Choose BorgBackup? BorgBackup,…
You can list the available fonts on your Arch Linux system using various methods and tools. Here are a few different approaches: Remember that font availability can also depend on the desktop environment or window manager you are using. Some environments, like GNOME or KDE, have their font settings that can override system-wide settings. Choose…
Many people are familiar with the problem of synchronizing files in their own private cloud with their local machine in a professional or private context. Often there are different sync clients for e.g. nextcloud or ownCloud for this… These save local copies of the files in the file system of the computer with which you…
When getting an invalid argument error when doing swapon /swapfile (for instance) it might be due to the underlying filesystem being btrfs. In this case you need to do the following steps: Since version 6.1 of the btrfs tooling it’s possible to create the swapfile in a single command (except the activation): All commands need…
We recently migrated our workstations internally from Debian to Arch Linux using Hyprland and Wayland. We were not sure if this experiment would be crowned with success, but we were pleasantly surprised. On top of that, we installed NVIDIA cards, which made the whole procedure even more difficult. But the end result is something to…
As we keep using WSL all the time we would like to point out that with the latest release WSL will also support systemd! Read the full post here: Systemd support is now available in WSL! – Windows Command Line (microsoft.com) Here you can also see it in action on one of our machines: This…
After announced, our Windows 11 test instance will not receive further updates… so we’re back on Windows 10 here… Views: 10
Enabling the Windows Subsystem for Linux to include support for Wayland and X server related scenarios. More on this existing New Feature can be found here: https://github.com/microsoft/wslg Enjoy! Views: 7
Don’t you find yourself typing the usual bash commandos into PowerShell from time to time? The natural second thought is often: „ah, I have to install cygwin or something“… but since I’m constantly switching back and forth between the Linux and Windows world, I of course also have WSL 2 on my Windows workstation ……
Another great post from Scott Hanselman about keeping WSL instances up to date automatically within Windows 10: https://www.hanselman.com/blog/keeping-your-wsl-linux-instances-up-to-date-automatically-within-windows-10 I’ve done this on my development machine (which is running Windows 10 Pro) like this: Here’s a sample run of the script: As you can see, this is a Powershell script that does all for my 2…
Recently there was a news going wild on the internet regarding some guy saying that Microsoft will drop the current kernel in favour of the Linux kernel. I have my own opinion about this, but here’s an article that describes the situation well (at least in my opinion). So here’s the read: https://boxofcables.dev/no-microsoft-is-not-rebasing-windows-to-linux/amp/ Views: 11
I would like to recommend here a really good YouTube session by Scott Hanselman which deals with development on Windows using the Windows Subsystem for Linux. Very recommendable! This shows, among other things, how the boundaries between Linux and Windows continue to blur and that you can develop under Windows very comfortably for Windows! Here’s…