ITFROMZERO - Share tobe shared!

Artificial Intelligence tutorial - IT technology blog

A Practical Guide to Using OpenAI API with Python: From Setup to Production

By IT From Zero March 3, 2026

A practical guide to using the OpenAI API with Python in a DevOps environment: proper setup, building a wrapper function with retry logic, streaming responses, parsing structured JSON output, and tracking token costs. Focused on common pitfalls and how to avoid them from the start.

Virtualization

KVM vs VirtualBox vs VMware: Choosing the Right Hypervisor for Your Use Case

By IT From Zero March 2, 2026

A comparison of KVM, VirtualBox, and VMware based on real benchmark performance, snapshots, networking, and guest integration — helping you choose the right hypervisor for each scenario: homelab, development, or production server.

How to Install ComfyUI for Local AI Image Generation

By IT From Zero March 2, 2026

A practical guide to installing ComfyUI locally for AI image generation with Stable Diffusion — covering GPU setup, model downloads, configuration, and real-world monitoring. Drawn from 8 months of hands-on use.

Linux

Install and Configure Nginx on Ubuntu 22.04: A Complete Web Server Guide from A to Z

By IT From Zero March 2, 2026

A step-by-step guide to installing and configuring Nginx on Ubuntu 22.04 with a quick-start structure — from the first command to virtual hosts, reverse proxy, and HTTPS. Includes practical tips on performance tuning, rate limiting, and zero-downtime reloads in production.

Centos

Installing and Configuring AlmaLinux as a CentOS Replacement: Real-World Experience

By IT From Zero March 2, 2026

A guide to installing AlmaLinux and migrating in-place from CentOS 7/8 to AlmaLinux without rebuilding servers. Compares AlmaLinux vs Rocky Linux vs Oracle Linux from a practical DevOps perspective, with basic post-install security configuration included.

Database

SQL vs NoSQL: When to Choose Each for Your Project

By IT From Zero March 2, 2026

SQL and NoSQL aren't competitors — each solves a different problem. This article breaks down when to choose SQL, when to use NoSQL, and how to combine both in real-world systems.

What is Prompt Injection and How to Protect Your AI Application from Attacks

By IT From Zero March 2, 2026

Prompt injection is an attack that embeds malicious instructions into user input to override an AI model's behavior. This post shares hands-on experience and 5 layers of defense: input sanitization, role separation, output validation, least privilege, and monitoring.

Git

Git Hooks: Automate Your Workflow So You Never Commit Broken Code Again

By IT From Zero March 2, 2026

Git hooks let you automatically run linting, tests, and commit message validation before code enters the repo — no manual reminders needed. This article compares client-side vs server-side hooks, manual hooks vs Husky, and walks through the 3 most practical hooks to implement for your team.

Linux

Installing and Configuring NTP Server on Linux: Fixing Time Sync Issues in Production

By IT From Zero March 2, 2026

A guide to installing chrony and configuring internal NTP server/client on Linux, drawn from real production operations experience. Covers cluster configuration, firewall setup, offset verification, and a basic monitoring script.

Fine-tuning AI Models with Your Own Data: A Practical Guide from A to Z

By IT From Zero March 2, 2026

A hands-on guide to fine-tuning AI models with your own data using LoRA and QLoRA. From dataset preparation and LoRA adapter configuration to training with SFTTrainer, merging, and deploying a custom model for real-world use.

A Guide to git push –force-with-lease: The Safer Force Push to Avoid Overwriting Teammates’ Code

A Guide to git merge-base: Finding the Common Ancestor Commit for Accurate Diffing in CI/CD

Ubuntu Server Security Auditing with Lynis: Vulnerability Scanning and Practical Hardening

Keyless Git Commit Signing with Gitsign and Sigstore: Modern Identity Verification

A Guide to Using OpenLLMetry and Traceloop for Monitoring and Tracing LLM Applications

A Guide to MySQL High Availability with Orchestrator: Automated Topology Discovery and Safe 2 AM Failover

How to Deploy Uptime Kuma with Docker Compose: Monitor Websites and Send Instant Telegram Alerts

How to Configure User Namespace Remapping (userns-remap) in Docker

Monitoring Pi-hole DNS Server with Prometheus and Grafana: Track DNS Query Traffic, Ad Blocking Rates, and Top Clients

Configuring systemd-journal-remote on Fedora Server: Centralized Logging over HTTPS mTLS

A Practical Guide to Using OpenAI API with Python: From Setup to Production

KVM vs VirtualBox vs VMware: Choosing the Right Hypervisor for Your Use Case

How to Install ComfyUI for Local AI Image Generation

Install and Configure Nginx on Ubuntu 22.04: A Complete Web Server Guide from A to Z

Installing and Configuring AlmaLinux as a CentOS Replacement: Real-World Experience

SQL vs NoSQL: When to Choose Each for Your Project

What is Prompt Injection and How to Protect Your AI Application from Attacks

Git Hooks: Automate Your Workflow So You Never Commit Broken Code Again

Installing and Configuring NTP Server on Linux: Fixing Time Sync Issues in Production

Fine-tuning AI Models with Your Own Data: A Practical Guide from A to Z