Admin:Docs
Sebastian Palencsar

Sebastian Palencsar

Lead author and technical mind behind admindocs.de

@spalencsar

Sebastian has been working with Linux systems for over two decades and manages virtual infrastructures, container environments and heterogeneous server landscapes. The first steps into the world of technology began early — back then on a Commodore 64 — and led through various systems, networks and roles into professional system administration. Through his previous journalistic work, he combines technical depth with clear, structured documentation. Most content is based on real projects, daily challenges and proven procedures. His goal is to make complex topics understandable and provide solutions that work in practical operations and deliver reproducible results.

GitHub LinkedIn Linuxcommand.DEV Website
40 Posts
Writing since 2024
Kategorien: Server environments 10 Bash fundamentals 7 Arch Linux series 6 LPIC-1 series 5 Linux beginners 4 Networking 2
Tags: #linux 18 #linuxadmin 9 #bash 9 #shell 8 #scripting 8 #security 7 #basics 7 #ubuntu 5

Server environments

All updates
Set up a WireGuard VPN server on Ubuntu 26.08.2026 25 min Linux server hardening: SSH with FIDO2/YubiKey and CrowdSec 26.08.2026 40 min Install and configure Docker on Ubuntu 26.04 LTS 20.08.2026 25 min Set up a LEMP stack on Ubuntu 26.04 LTS: Nginx, MariaDB, PHP 8.5 and Let's Encrypt 15.05.2026 25 min Ubuntu upgrade: from version 24.04 LTS to 26.04 LTS 25.04.2026 25 min Immich: install a private photo cloud on Ubuntu 24.04 LTS Server 12.05.2025 28 min AlmaLinux: install and configure Docker and Docker Compose 21.10.2024 30 min Set up a LEMP stack on Ubuntu 24.04 LTS: Nginx, MariaDB, PHP 8.3 and Let's Encrypt 13.10.2024 25 min Ubuntu upgrade: from version 22.04 LTS to 24.04 LTS 10.10.2024 25 min Ubuntu 24.04: install Stirling PDF and run it in production 09.10.2024 18 min

Bash fundamentals

All updates
Bash Basics #7: Advanced Bash Techniques 28.10.2024 18 min Bash Basics #6: Error Handling and Debugging in Bash 27.10.2024 16 min Bash Basics #5: Input and Output in Bash 26.10.2024 18 min Bash Basics #4: Functions in Bash 25.10.2024 20 min Bash Basics #3: Control Structures in Bash 24.10.2024 20 min Bash Basics #2: Using Variables in Bash 23.10.2024 20 min Bash Basics #1: Create Your First Bash Shell Script 22.10.2024 15 min

Arch Linux series

All updates
Arch Linux: Advanced Security Features and Maintenance 27.08.2026 55 min Arch Linux: System Hardening and Security – Best Practices 15.11.2025 45 min Arch Linux: Best Practices and Maintenance Tips 23.11.2024 40 min Arch Linux: Installing the Graphical User Interface 18.11.2024 45 min Arch Linux: Installation and Basic Configuration 17.11.2024 45 min Arch Linux: The Comprehensive Guide to the Pacman Package Manager 24.10.2024 35 min

LPIC-1 series

All updates
LPIC-1: streams, pipes and redirections 13.07.2025 45 min LPIC-1: Text processing with shell commands 28.05.2025 25 min LPIC-1: viewing and editing file contents 16.05.2025 45 min LPIC-1: basic navigation and filesystem commands 14.05.2025 52 min LPIC-1: Understanding the Linux Command Line: Shell, Terminal, and First Commands 13.05.2025 25 min

Linux beginners

All updates
What is the Linux kernel? 12.09.2026 22 min NixOS: the Nix package manager guide 24.10.2024 25 min chmod on Linux: from basics to best practices 19.09.2024 60 min Command-line processor on Linux: understanding terminal, shell and CLI from the ground up 17.09.2024 50 min

Linux administration

All updates
Linux Administration #10: Boot Management and System Start 25.07.2025 88 min Linux Administration #9: System Monitoring and Performance 12.07.2025 110 min

Networking

All updates
Analyzing network problems on Linux systematically 06.08.2026 45 min What is a VPN?: a beginner guide 02.11.2024 28 min

Proxmox VE

All updates
Proxmox: Create and Use LXC Containers – Step-by-Step Guide for Beginners 14.04.2025 35 min Proxmox: Installation and First VM – Step-by-Step Guide 14.04.2025 25 min

ChatGPT & LLMs

All updates
ChatGPT Playbook: Practical Prompting for AI Communication 01.02.2025 55 min

Neuro-Symbolic AI

All updates
Neuro-symbolic AI: understanding and applying the best of both worlds 25.11.2024 50 min