Linux Tutorials & Guides
Comprehensive, hands-on guides for Linux engineers. From fundamentals to advanced production patterns.
DNS Observability on Linux: Troubleshooting with dig, dnstap, and Prometheus
Build complete DNS observability with advanced dig techniques, dnstap structured logging, Prometheus monitoring,...
Linux Network Commands Every Engineer Must Know
Essential networking commands for diagnosing, monitoring, and troubleshooting Linux network issues. From ip to ss, nmap...
Firewalld: Mastering Linux Firewall Management
Firewalld provides a dynamic firewall with zone-based rules. Learn to secure your servers with zones, services, rich...
grep for Linux Systems Administrators
Master grep: the single most important text-searching tool in a Linux admin's toolkit. From basic patterns to advanced...
sed Stream Editor: Text Transformation Mastery
sed processes text line by line, applying transformations with surgical precision. From simple substitutions to complex...
The find Command: File and Directory Hunter
The find command is a Swiss Army knife for locating files. Learn to search by name, size, date, permissions, and...
Oracle Linux on Raspberry Pi 4: Enterprise Linux on ARM
Run Oracle Linux on a Raspberry Pi 4 for an enterprise-grade ARM lab. Installation, UEK kernel, container workloads,...
Docker Architecture: A Guide to its Powerful Architecture
Understand Docker's layered architecture from the daemon to containers, images, and orchestration. Build...
DNS Explained: Embrace the Magic of Domain System Terminology
A comprehensive guide to DNS architecture, terminology, and how domain resolution works under the hood. Essential...