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VMware Clone and Snapshot Guide: Effective VM Management Tips from Real-World Experience

By admin March 26, 2026

Snapshot and Clone are powerful VMware features that help system administrators easily duplicate and manage VM states. This article, based on practical experience operating an 8-host ESXi cluster, guides you on effectively using these two tools to optimize workflows and minimize risks.

Python

Mastering Command-Line Interface (CLI) Development with Python and Click: Insights from an IT Engineer

By admin March 25, 2026

CLIs are powerful assistants for daily IT tasks. This article shares the secrets to building effective command-line tools with Python and Click, alongside practical experience from an IT Engineer.

Database

Optimizing Database Performance for High-Traffic Websites: Practical Experience from ITfromzero

By admin March 25, 2026

For websites to handle immense traffic, database optimization is crucial. This article shares practical experience on strategies from design, query optimization, caching, to monitoring to keep your database robust and stable.

Virtualization

Converting Virtual Machine Disk Formats with qemu-img: VMDK, QCOW2, VDI, and VHD

By admin March 25, 2026

This article provides a detailed guide on using the `qemu-img` tool to convert common virtual machine disk formats such as VMDK, QCOW2, VDI, and VHD. It covers preparation steps, basic command syntax, and practical use cases, helping newcomers easily migrate and manage VMs.

Centos

Install and Configure MariaDB on CentOS Stream 9: An Efficient MySQL Alternative

By admin March 25, 2026

This step-by-step guide is designed for IT beginners, helping you confidently deploy a powerful and stable MariaDB database system on CentOS Stream 9.

Linux

Understanding and Using Linux Capabilities: Fine-Grained Permissions Without Root for Applications

By admin March 25, 2026

Don't grant full root privileges to your application! This article provides a detailed guide on Linux Capabilities, a flexible permission mechanism that allows applications to perform privileged tasks without needing full root access. Includes a quick guide, in-depth explanations, and practical experiences for DevOps professionals.

Security

OWASP ZAP Guide: Web Application Vulnerability Scanning from Basics to CI/CD Automation

By admin March 25, 2026

This article shares practical experience with OWASP ZAP. It guides you through web application vulnerability scanning, from basic installation and configuration to automated CI/CD integration. The goal is to help you effectively protect your applications, detect security risks early, and maintain a secure system.

Database

PostgreSQL vs MySQL: A Detailed Comparison for IT Beginners

By admin March 25, 2026

Introduction: PostgreSQL and MySQL – Which One to Choose? When you start learning IT, especially…

Development

Makefile Tutorial: Optimize Your IT Project Workflow

By admin March 24, 2026

Introduction to the ProblemWhen working on software, do you find yourself repeatedly performing familiar tasks…

Linux

Effective Linux Debugging: A Detailed Guide with journalctl and dmesg

By admin March 24, 2026

Debugging on Linux is an essential skill. journalctl and dmesg are two powerful tools that help you identify the root cause of any issue, from services to hardware. This article guides you on how to use them effectively.