https://www.lch361.net/ Greetings, user of the internet. Welcome to my little website, where I put information about myself and my projects. Zola 0.22.1 en Sun, 06 Sep 2026 00:00:00 +0000 https://www.lch361.net/articles/2026-09-06/ https://www.lch361.net/articles/2026-09-06/ If you maintain Linux servers, you almost always have the ability to log in with SSH, but not always have the luxury to log in with a local console and keyboard. In this case, one misconfiguration on a server can cut off your ability to configure the server permanently. How to make a Linux server more resistant to your own mistakes? Let's find out. lch361's articles Thu, 03 Sep 2026 00:00:00 +0000 https://www.lch361.net/articles/2026-09-03/ https://www.lch361.net/articles/2026-09-03/ Tailscale is a very simple and convenient VPN software. You can get a control plane, clients, routes and exit nodes with it in less than an hour without caring at all about how keys, routing or relays work. But what if you need to implement a network policy, for which Tailscale doesn't have an established interface? This article presents an example of how to implement PBR, knowing how Tailscale routing works. lch361's articles Sat, 21 Feb 2026 00:00:00 +0000 https://www.lch361.net/articles/2026-02-21/ https://www.lch361.net/articles/2026-02-21/ Single-board computers are often used as Linux servers. Raspberry Pi 4, for example, has enough system resources to run multiple applications in parallel. Often, these applications are run separately on different VMs or containers, in order to enhance security and maintainability. This article shows a way to set up your Raspberry Pi as a Linux container host and a hypervisor. lch361's articles Sun, 01 Jun 2025 00:00:00 +0000 https://www.lch361.net/articles/2025-06-01/ https://www.lch361.net/articles/2025-06-01/ Gap buffer is one of the most common data structures used for editing text, while a dynamic array is the simplest data structure for manipulating a sequence of elements of arbitrary size. What is the optimal choice for an application that not only does text editing, but redraws the entire line on every key press? In this article, we'll find out. lch361's articles Tue, 01 Sep 2026 00:00:00 +0000 https://www.lch361.net/projects/infrastructure-lch361-net/ https://www.lch361.net/projects/infrastructure-lch361-net/ Open source recipes to deploy and configure almost everything behind services running on this server. It allows reproducing my setup starting from bare network, root-accessed host, hypervisor and storage. Every feature is documented by architectural decisions described in this page. lch361's projects Mon, 02 Jun 2025 00:00:00 +0000 https://www.lch361.net/projects/lch361-net/ https://www.lch361.net/projects/lch361-net/ My personal website that you are watching right now. A place for my thoughts. A place to tell about my skills, projects and share information that I, from a developer perspective, find useful and interesting. lch361's projects Thu, 27 Mar 2025 00:00:00 +0000 https://www.lch361.net/projects/spiral/ https://www.lch361.net/projects/spiral/ General purpose editing of lines in a terminal. Available as a Zig library, as well as a separate executable. Intended usage is command-line applications working in a REPL fashion, where every line could require rich editing. lch361's projects Tue, 15 Oct 2024 00:00:00 +0000 https://www.lch361.net/projects/lcalc/ https://www.lch361.net/projects/lcalc/ A command-line calculator with simple, but modern interface. Intended usage is interactive, shell-agnostic calculations. Supports arbitrary precision integer, rational, floating and complex numbers. It is also my first complete project in Zig programming language. lch361's projects Tue, 20 Aug 2024 00:00:00 +0000 https://www.lch361.net/projects/stm32-morse-device/ https://www.lch361.net/projects/stm32-morse-device/ An STM32F103C6T6 microcontroller firmware. Textual information goes to the USART pins on a microcontroller, while Morse signal is on one of the digital pins, for example, connected to LED. Sending ASCII letters through USART will make an LED blink accordingly to the decoded Morse signal, and otherwise. It is my first firmware made with Zig programming language, and it serves as a great example of a simple, interrupt-driven application. lch361's projects Mon, 22 Jul 2024 00:00:00 +0000 https://www.lch361.net/projects/sdns-json/ https://www.lch361.net/projects/sdns-json/ A command-line converter of DNSCrypt 2 stamps into JSON, and otherwise. Provides an intuitive interface and a simple to understand documentation, while simultaneously conforming to both JSON and DNSCrypt standards. Many DNSCrypt applications use stamps in their encoded form, but there was no offline application to configure them in text format. Also, it is my first complete project in Rust programming language. lch361's projects Wed, 03 Jul 2024 00:00:00 +0000 https://www.lch361.net/projects/fcdl/ https://www.lch361.net/projects/fcdl/ A Linux kernel module written in C. Creates a special character device that, when being read from, outputs every created or deleted file on the entire system. It does so by intercepting system calls. My first Linux Kernel module ever developed. Not very practical for use, because Inotify exists. lch361's projects