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Testcontainers Guide: Stop Using H2 Database for Integration Testing

By admin May 17, 2026

The era of using H2 Database for testing is over. Here is a detailed guide on using Testcontainers with Docker to automate Integration Tests and ensure production parity.

Network

Mastering iproute2: Moving Beyond Just Assigning IPs

By admin May 17, 2026

Ditch ifconfig and master iproute2. A detailed guide covering IP management, MTU optimization for VPNs, and Policy Based Routing (PBR) for Multi-WAN systems.

Security

Self-hosting Passbolt with Docker: Ending Password Sharing via Zalo for Tech Teams

By admin May 17, 2026

Stop the habit of sending passwords via Zalo. Learn how to install self-hosted Passbolt with Docker for professional team credential management with GPG encryption and transparent Audit Logs.

MySQL

MySQL Multi-Source Replication: The Ultimate Consolidation Trick for Data Engineers

By admin May 17, 2026

Tired of manual data aggregation? Discover how to configure MySQL Multi-Source Replication to consolidate data from multiple masters into a single source. Practical tips on handling ID conflicts and speed optimization for MySQL 8.0.

Ubuntu

Optimizing Ubuntu with XanMod Kernel: Reduce Latency and Boost System Speed

By admin May 17, 2026

A guide to installing and optimizing XanMod Kernel on Ubuntu based on real-world experience. Reduce system latency and boost processing speeds for both servers and personal computers effectively.

Network

Building a Site-to-Site VPN with StrongSwan: Secure and Professional Branch Connectivity

By admin May 17, 2026

Need to connect internal networks between offices? This detailed StrongSwan Site-to-Site VPN setup guide helps you build secure, stable IPsec tunnels on Linux with real-world troubleshooting tips.

Virtualization

KubeVirt: Running Virtual Machines Directly on Kubernetes for DevOps

By admin May 17, 2026

KubeVirt bridges the gap between VMs and containers, enabling centralized management on Kubernetes. Explore deployment steps and practical tips to optimize your DevOps infrastructure.

Fedora

Mastering rpm-build and rpmlint: Bringing ‘Home-Grown’ Scripts to Fedora Standards

By admin May 17, 2026

Stop manual file copying! Learn to package RPMs on Fedora with rpm-build and rpmlint for professional software management, automated dependencies, and fast deployment.

Ubuntu

Ubuntu Security: Using Firejail to Sandbox Applications and Prevent Data Theft

By admin May 17, 2026

Don't let a random GitHub script steal your SSH keys or passwords. Firejail allows you to easily sandbox Ubuntu applications, keeping your system secure and lightweight.

Git

Git Rerere: Don’t Let Merge Conflicts Trouble You Twice

By admin May 17, 2026

Git Rerere is a feature that remembers how you fix merge conflicts to automatically apply them next time. This trick saves 30-40 minutes when rebasing complex branches.