ITFROMZERO – Share tobe shared!

Upgrading Fedora with DNF System Upgrade: Fast, Clean, and No Fear of ‘Bricking’ Your System

By admin April 7, 2026

A guide to safely upgrading Fedora using DNF System Upgrade. Keep your data intact, resolve dependency conflicts, and optimize your system after the update.

Git

Git Submodule vs Git Subtree: Don’t Let Shared Libraries Become Your Project’s ‘Black Hole’

By admin April 7, 2026

Analyzing the pros and cons of Git Submodule and Git Subtree. A guide to managing shared libraries effectively, avoiding code conflicts, and optimizing developer workflows.

Security

Stopping Brute-force: Deploying Authelia as SSO and 2FA for Web Systems

By admin April 6, 2026

Secure your self-hosted web systems with Authelia. A detailed guide on setting up Single Sign-On (SSO) and 2FA to effectively stop brute-force attacks.

Docker

Does Docker ‘Bypass’ UFW? Essential Container Port Security for VPS

By admin April 6, 2026

Why does UFW fail to block Docker ports? Discover 3 practical solutions to resolve Docker firewall bypass issues and protect your VPS from hackers.

Security

REST API Security: Don’t Let Your System Crash Due to Basic Mistakes

By admin April 6, 2026

Don't let your API be a gateway for hackers. Learn how to properly implement JWT, RBAC, and Data Validation to protect your entire system.

Fedora

Automating Container-Native Infrastructure with Fedora CoreOS and Ignition

By admin April 6, 2026

A detailed guide to deploying Fedora CoreOS and Ignition. Automate infrastructure configuration and manage Linux servers using Infrastructure as Code.

Linux

Managing Multiple Java Versions on Linux: Stop Doing It Manually, Use SDKMAN!

By admin April 6, 2026

Forget manual Java installation! SDKMAN! lets you install, manage, and switch between Java 8, 11, 17, and 21 on Linux with simple commands and no root access.

Fedora

Need Ultra-Lightweight Containers on Fedora? Try systemd-nspawn Instead of Docker

By admin April 6, 2026

Explore systemd-nspawn on Fedora: An ultra-lightweight container solution with instant boot times and minimal resource usage compared to Docker or Podman.

Database

PostgreSQL Monitoring: From ‘Information Blindness’ to a Professional Alerting System

By admin April 6, 2026

Don't wait for a database crash to find out something's wrong. Here is a detailed guide to setting up professional PostgreSQL monitoring with Prometheus and Grafana based on real-world experience.

Artificial Intelligence tutorial - IT technology blog

Cleaning PDF/Office Data for RAG with Unstructured.io: Turning ‘Trash’ into Gold

By admin April 6, 2026

Discover how Unstructured.io solves data extraction from PDF and Office files for RAG. Boost accuracy by 35% with smart table processing and text cleaning.

Monitor MySQL Performance with Performance Schema and sys Schema: Find Bottlenecks Fast

Building a News Website with Django: A Step-by-Step Guide for Beginners

Structuring the .claude/ Directory for Claude Code Projects: From Small to Large

OOM Killer: Why Linux Kills Your MySQL and How to Protect It

VMware Aria Operations Deployment Guide: A Lifesaver for vSphere Administrators

MySQL: Don’t Let utf8 Deceive You – The Ultimate Guide to Fixing Emojis and Font Issues with utf8mb4

Incus on Ubuntu: Installation Guide and Upgrading from LXD

Linux ACL: How to Set ‘Ultra-Detailed’ Permissions for Each User (Replacing chmod 777)

Mastering HashiCorp Packer: Automating Proxmox and VMware VM Template Creation

Stop Installing Terraform and Ansible Directly: Use Docker CLI to Keep Your Host Clean

Upgrading Fedora with DNF System Upgrade: Fast, Clean, and No Fear of ‘Bricking’ Your System

Git Submodule vs Git Subtree: Don’t Let Shared Libraries Become Your Project’s ‘Black Hole’

Stopping Brute-force: Deploying Authelia as SSO and 2FA for Web Systems

Does Docker ‘Bypass’ UFW? Essential Container Port Security for VPS

REST API Security: Don’t Let Your System Crash Due to Basic Mistakes

Automating Container-Native Infrastructure with Fedora CoreOS and Ignition

Managing Multiple Java Versions on Linux: Stop Doing It Manually, Use SDKMAN!

Need Ultra-Lightweight Containers on Fedora? Try systemd-nspawn Instead of Docker

PostgreSQL Monitoring: From ‘Information Blindness’ to a Professional Alerting System

Cleaning PDF/Office Data for RAG with Unstructured.io: Turning ‘Trash’ into Gold