ITFROMZERO – Share tobe shared!

Guide to Migrating from Docker to Podman on Fedora: Safer, More Efficient for Devs

By admin March 10, 2026

This article provides a detailed guide on migrating from Docker to Podman on Fedora. It analyzes pros and cons, explains Podman installation, rootless container configuration, and effective Docker Compose alternatives for a safer, optimized development environment.

Linux

Log Rotation on Linux with Logrotate: Rescuing Your Disk Drive in the Middle of the Night

By admin March 10, 2026

As an IT engineer, I've experienced servers crashing at 2 AM due to full log files. This article consolidates hard-earned experience on using Logrotate on Linux, an indispensable tool for automatically managing, rotating, and compressing log files to keep your system stable and efficient.

Artificial Intelligence tutorial - IT technology blog

Qdrant Installation and Usage Guide: A Powerful Vector Database for AI and RAG Applications

By admin March 10, 2026

This article provides a detailed guide on how to install and use Qdrant, a powerful vector database, to build effective AI and RAG applications. I share practical experience after more than 6 months of deploying Qdrant in a production environment, analyzing its pros and cons, and providing sample Python code to help you get started immediately.

Optimizing Workflow with Gemini CLI: Your AI Assistant in the Terminal, Boosting Developer Productivity

By admin March 10, 2026

This article provides a detailed guide on using Gemini CLI, a powerful tool that transforms your terminal into an effective AI assistant. We'll explore installation, configuration, and practical examples of how it can optimize your daily IT tasks.

MySQL

A Guide to Using MySQL Slow Query Log to Detect and Optimize Slow SQL Queries

By admin March 10, 2026

Finding and optimizing slow SQL queries is an essential skill. This article guides you step-by-step on using the MySQL Slow Query Log, a powerful tool for diagnosing and improving database performance.

Security

A Guide to Configuring AppArmor on Ubuntu: Restricting Process Permissions to Secure Your Server

By admin March 9, 2026

Many admins focus only on firewalls and SSH, forgetting the danger posed by the running applications themselves. This article shares real-world experience on how to use AppArmor on Ubuntu to 'jail' processes, limit their permissions, and prevent privilege escalation during an attack.

Virtualization

How to Remotely Manage KVM Virtual Machines with the virt-manager GUI

By admin March 9, 2026

Fixing bugs on a KVM server late at night using only the virsh command line? There's a better way! This guide shows how to use virt-manager to remotely manage KVM VMs via SSH, providing an intuitive GUI to handle incidents faster and more effectively.

Docker

Practical Docker Networking: When to Use Bridge, Host, or Overlay?

By admin March 9, 2026

From the frustrating 'Connection Refused' error when containers can't find each other, to mastering different Docker network types. This article is my hands-on experience with Bridge, Host, and Overlay networks, helping you choose the right tool for each specific problem.

Security

Enhancing SSH Security: A Guide to Setting Up 2FA with Google Authenticator

By admin March 9, 2026

Don't let your server be compromised by a password alone. This guide will show you how to set up a second layer of 'armor' for SSH using your phone with Google Authenticator.

Ubuntu

How to Install Node.js and npm on Ubuntu (2024 Guide)

By admin March 9, 2026

Looking for a professional way to install Node.js and npm on Ubuntu? This article provides a detailed guide on 3 methods: NVM, NodeSource PPA, and the default repository, and also shows you how to use PM2 to manage your applications.

Advanced Docker Swarm: Rolling Updates, Placement Constraints, and Zero-Downtime Deployments

Hot Add CPU and RAM on VMware vSphere: Upgrade Virtual Machine Resources Without Rebooting

Docker-in-Docker (DinD) vs Docker-out-of-Docker (DooD): A Practical CI/CD Runner Setup Guide

Mastering /proc and /sys: Inspecting Linux Internals Without Third-Party Tools

Mastering DeepSeek-R1 on Linux: Optimizing “Home-Grown” Reasoning AI for Peak Performance

Dockerize WordPress: Accelerate Your MariaDB and Redis Cache Stack for Production

Automating File Monitoring with Python Watchdog: Stop Polling and Start Listening

Grafana Pyroscope: Hunting Down CPU and RAM “Hogs” Directly on Production

Mastering VMware Host Profiles: The Ultimate Way to Standardize ESXi Cluster Configurations

Varnish + Nginx: The Ultimate Lifesaver for High-Traffic Websites on Ubuntu

Guide to Migrating from Docker to Podman on Fedora: Safer, More Efficient for Devs

Log Rotation on Linux with Logrotate: Rescuing Your Disk Drive in the Middle of the Night

Qdrant Installation and Usage Guide: A Powerful Vector Database for AI and RAG Applications

Optimizing Workflow with Gemini CLI: Your AI Assistant in the Terminal, Boosting Developer Productivity

A Guide to Using MySQL Slow Query Log to Detect and Optimize Slow SQL Queries

A Guide to Configuring AppArmor on Ubuntu: Restricting Process Permissions to Secure Your Server

How to Remotely Manage KVM Virtual Machines with the virt-manager GUI

Practical Docker Networking: When to Use Bridge, Host, or Overlay?

Enhancing SSH Security: A Guide to Setting Up 2FA with Google Authenticator

How to Install Node.js and npm on Ubuntu (2024 Guide)