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Automated Temporary File Management with systemd-tmpfiles: Don’t Let Your Server Die from Junk

By admin June 25, 2026

Avoid server downtime due to full disks. Learn how to use systemd-tmpfiles to automatically clean up temporary files and manage Linux system directories professionally and safely.

Git

Mastering git restore and git switch: The Modern Git Replacements for git checkout

By admin June 24, 2026

git switch and git restore split git checkout into two separate commands — each doing exactly one thing. Since Git 2.23, the workflow is clearer, less error-prone, and especially beneficial for team collaboration.

Security

Gophish: Build Your Own Phishing Simulation System for Internal Security Testing and Training on Linux

By admin June 24, 2026

Gophish is an open-source tool that lets you run internal phishing simulations without paying for an expensive external service. This guide covers installation, end-to-end campaign configuration, and how to analyze results to genuinely improve your team's security awareness.

Network

Configuring Traffic Mirroring on Linux with tc-mirred: Copy Packets to IDS/IPS Without Disrupting Service

By admin June 24, 2026

Traffic Mirroring with tc-mirred lets you copy all packets to a passive IDS/IPS device without disrupting production traffic. This guide walks through configuring both ingress and egress mirroring step by step, along with tips for selective traffic filtering and automating the setup with a systemd service.

Virtualization

Installing and Configuring Xen Hypervisor on Debian/Ubuntu: Type-1 Virtualization with XL Toolstack and Dom0

By admin June 24, 2026

A guide to installing Xen Hypervisor on Debian/Ubuntu, configuring Dom0, limiting RAM allocation, and creating DomU virtual machines with the XL toolstack. Covers PVH mode, network bridging, LVM snapshots, and everyday management commands.

MySQL

Mastering Foreign Keys in MySQL: Don’t Let Your Database Become a Data Junkyard

By admin June 24, 2026

Stop your database from becoming a junkyard. This guide covers MySQL Foreign Keys, ON DELETE CASCADE, and performance optimization tips for tables exceeding 50 million records.

Git

Upgrade Git Diff with Delta: Side-by-Side View and Beautiful Highlighting

By admin June 24, 2026

Tired of the default Git diff interface? Upgrade to Delta for side-by-side code viewing, syntax highlighting, and a professional interface right in your Terminal.

Database

pg_cron: Schedule Automated Jobs Inside PostgreSQL Without System Cron

By admin June 23, 2026

pg_cron is an extension that lets you schedule recurring jobs directly inside PostgreSQL without needing system cron or pgAgent. This article walks through installation, creating jobs for log cleanup and materialized view refreshes, and practical tips for managing jobs effectively.

Python

Building Professional Desktop Applications with Python and PySide6: From Qt Designer to Advanced Event Handling

By admin June 23, 2026

A practical guide to building desktop applications with Python PySide6 — from designing the UI in Qt Designer and handling events with Signal/Slot, to organizing production-ready code and packaging it into an executable. Based on six months of real-world experience.

Development

Mock Service Worker (MSW): Simulate APIs for Frontend — Stop Waiting on Backend

By admin June 23, 2026

Mock Service Worker (MSW) lets frontend developers intercept APIs at the network level — no need for the backend to be up and running to develop and test. This guide covers installation, writing handlers, and integrating MSW into both dev environments and unit tests.

Installing and Configuring Chrony on CentOS Stream 9: Setting Up an NTP Server and Client for Accurate Time Synchronization

Analyzing MySQL Slow Query Log with pt-query-digest: Pinpointing the Real Culprit Behind Database Slowdowns

Optimizing MySQL Pagination for Millions of Rows: Use Seek Method Instead of OFFSET

Building a Stealth VPN with Xray-core and XTLS-Reality on Linux: Traffic That Looks Like Regular HTTPS

Build Your Own Captive Portal with nodogsplash: Professional Public Wi-Fi Control on Linux

MySQL InnoDB Locking: Understanding Row, Gap, and Next-Key Locks to Prevent System Crashes

Optimizing Your Coding Workflow with Fedora Sway Spin: From Installation to Advanced Configuration

Fix Ubuntu GRUB Errors in 5 Minutes with Boot-Repair: Fast, Reliable, and Secure

Goodbye ‘podman generate systemd’: How to Use Quadlet for Professional Container Management on Fedora

Professional Database Schema Management with Bytebase: GitOps Workflow and SQL Review for Dev Teams

Automated Temporary File Management with systemd-tmpfiles: Don’t Let Your Server Die from Junk

Mastering git restore and git switch: The Modern Git Replacements for git checkout

Configuring Traffic Mirroring on Linux with tc-mirred: Copy Packets to IDS/IPS Without Disrupting Service

Installing and Configuring Xen Hypervisor on Debian/Ubuntu: Type-1 Virtualization with XL Toolstack and Dom0

Mastering Foreign Keys in MySQL: Don’t Let Your Database Become a Data Junkyard

Upgrade Git Diff with Delta: Side-by-Side View and Beautiful Highlighting

pg_cron: Schedule Automated Jobs Inside PostgreSQL Without System Cron

Building Professional Desktop Applications with Python and PySide6: From Qt Designer to Advanced Event Handling

Mock Service Worker (MSW): Simulate APIs for Frontend — Stop Waiting on Backend