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Mastering Policy-Based Routing (PBR) on Linux: Route Traffic Like a Pro

By admin April 20, 2026

Don't let backup traffic clog your main connection. A detailed guide on using Policy-Based Routing (PBR) on Linux to intelligently route traffic based on source IP and Port.

Ubuntu

i3wm on Ubuntu: Transform Your Laptop into the Ultimate Coding Machine for Developers

By admin April 20, 2026

A detailed guide on installing and configuring i3wm on Ubuntu for developers. This article shares practical tips to optimize your workspace, boost coding efficiency, and save system resources.

Artificial Intelligence tutorial - IT technology blog

Claude Agent SDK: Building Production-Ready AI Agents with Python/TypeScript

By admin April 20, 2026

Master the Claude Agent SDK to build professional AI agents. Real-world insights on optimizing latency, slashing costs by 90% with Prompt Caching, and handling production errors.

Monitoring

smartmontools Guide: Diagnosing Linux Hard Drive Issues Before Your Data Vanishes

By admin April 20, 2026

Don't let your hard drive die in silence. A detailed guide on using smartmontools to diagnose HDD/SSD health on Linux and setting up automated Telegram alerts.

Security

Securing SSH with Hardware Security Keys (FIDO2/Yubikey): When Private Keys Are No Longer a ‘Fatal Weakness’

By admin April 20, 2026

Hardening server security with Hardware Security Keys (Yubikey/FIDO2). A detailed guide on setup, using Resident Keys, and configuring servers to prevent private key leaks.

Database

Mastering MongoDB Aggregation Framework: Building Real-World Data Pipelines

By admin April 20, 2026

Learn to build optimized MongoDB Aggregation Pipelines through real-world examples. Explore $match, $group, $lookup, and how to handle the 100MB RAM limit for Big Data.

Security

Auditd Configuration Guide: The “Black Box” for Tracking Every Change on Linux

By admin April 20, 2026

Hackers can wipe history but they can't hide from Auditd. A guide to configuring the Linux "black box" to trace file edits, command execution, and overall server security.

Docker

Dockerize Spring Boot: From 800MB ‘Giant’ to 150MB and the Ultimate Trick to Fix OOM

By admin April 20, 2026

Learn advanced Spring Boot Dockerization: Reduce image size from 800MB to 150MB and use smart JVM configuration to eliminate OOM errors in production.

Virtualization

Installing Windows 11 on KVM/Proxmox: The Best Way to Emulate TPM 2.0 and Secure Boot

By admin April 20, 2026

Installing Windows 11 on Proxmox/KVM often fails due to hardware incompatibility. Learn how to emulate TPM 2.0 and Secure Boot for a proper setup with full updates.

Python

Automating Image Processing with Pillow: Tips for Compressing and Watermarking Thousands of Files

By admin April 20, 2026

Learn to automate image processing with Pillow in Python: from distortion-free resizing and watermarking to compression techniques that reduce file size by 70% for SEO.

Automating Proxmox with Terraform: From Manual ‘Click-ops’ to Professional IaC

Building a Data Streaming System with Apache Kafka and Node.js: From Zero to Production

Mastering Logical Replication in PostgreSQL: Flexible and Practical Data Sync

Mastering Fedora Security: Managing System-Wide Encryption with update-crypto-policies

Automating Dependencies with Renovate: Don’t Let Manual Updates Slow You Down

Harbor Installation Guide: Building a Professional Private Registry for DevOps

How to Never Forget SSL and Domain Renewals Again with Prometheus Blackbox Exporter

Boost Productivity with Git Aliases: Don’t Let Typing Commands Slow You Down

How to Safely Expose Docker Containers to the Internet via Cloudflare Tunnel (No Port Forwarding)

Self-hosting Grafana OnCall: Professional On-call Scheduling and Escalation for DevOps Teams

Mastering Policy-Based Routing (PBR) on Linux: Route Traffic Like a Pro

i3wm on Ubuntu: Transform Your Laptop into the Ultimate Coding Machine for Developers

Claude Agent SDK: Building Production-Ready AI Agents with Python/TypeScript

smartmontools Guide: Diagnosing Linux Hard Drive Issues Before Your Data Vanishes

Securing SSH with Hardware Security Keys (FIDO2/Yubikey): When Private Keys Are No Longer a ‘Fatal Weakness’

Mastering MongoDB Aggregation Framework: Building Real-World Data Pipelines

Auditd Configuration Guide: The “Black Box” for Tracking Every Change on Linux

Dockerize Spring Boot: From 800MB ‘Giant’ to 150MB and the Ultimate Trick to Fix OOM

Installing Windows 11 on KVM/Proxmox: The Best Way to Emulate TPM 2.0 and Secure Boot

Automating Image Processing with Pillow: Tips for Compressing and Watermarking Thousands of Files