ITFROMZERO – Share tobe shared!

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.

Development

A Beginner’s Guide to CI/CD with GitHub Actions: Automation for Happier Devs

By admin March 9, 2026

Tired of manual deployments and unexpected bugs? This article provides a step-by-step guide to setting up a CI/CD pipeline with GitHub Actions, automating everything from testing to deployment to boost productivity and minimize errors.

Development

Complete Guide to Installing and Configuring Apache2 on Ubuntu 22.04

By admin March 8, 2026

Installing Apache2 on Ubuntu 22.04: virtual hosts, UFW, and SSL with Let's Encrypt. This is the workflow I actually run in production — not a copy from the docs.

Python

Python Automation for Daily Tasks: File Cleanup, Backups, and Automated Notifications

By admin March 8, 2026

Learn how to write Python scripts to automate 3 real-world daily tasks: organizing folders by file type, backing up MySQL with automatic rotation, and monitoring a directory with Telegram notifications. Includes practical lessons on performance when handling large files.

Security

Linux Server Security Audit with Lynis: From Installation to a Hardening Index of 80+

By admin March 8, 2026

Lynis runs directly inside your server and checks over 200 configuration points that remote scanners simply can't see. This guide walks through installation, interpreting results, and fixing real-world warnings — from SSH to kernel hardening — to push your hardening index from 55 up to 80+.

Docker

Docker Volumes: Persistent Data Storage That Survives Container Restarts

By admin March 8, 2026

Lost an entire database at 2 AM because I forgot to use Docker volumes — here's the hard-won lesson and a guide to configuring volumes correctly for production, including backup and monitoring.

Artificial Intelligence tutorial - IT technology blog

Whisper OpenAI: A Practical Guide to Speech-to-Text with Python

By admin March 8, 2026

After six months running Whisper in production, I compare three approaches — Whisper local, Whisper API, and faster-whisper — breaking down the pros and cons, walking through practical Python code, and covering how to handle common issues.

Database

Optimizing PostgreSQL Queries with EXPLAIN ANALYZE: Analyzing and Improving Query Performance

By admin March 8, 2026

Learn how to use EXPLAIN ANALYZE in PostgreSQL to read execution plans, analyze slow queries, and optimize performance with the right indexes. This guide goes from a 5-minute quick start to advanced techniques like covering indexes, composite indexes, and auto_explain.

Automating Proxmox with Terraform: From Manual ‘Click-ops’ to Professional IaC

Building a Data Streaming System with Apache Kafka and Node.js: From Zero to Production

Mastering Logical Replication in PostgreSQL: Flexible and Practical Data Sync

Mastering Fedora Security: Managing System-Wide Encryption with update-crypto-policies

Automating Dependencies with Renovate: Don’t Let Manual Updates Slow You Down

Harbor Installation Guide: Building a Professional Private Registry for DevOps

How to Never Forget SSL and Domain Renewals Again with Prometheus Blackbox Exporter

Boost Productivity with Git Aliases: Don’t Let Typing Commands Slow You Down

How to Safely Expose Docker Containers to the Internet via Cloudflare Tunnel (No Port Forwarding)

Self-hosting Grafana OnCall: Professional On-call Scheduling and Escalation for DevOps Teams

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)

A Beginner’s Guide to CI/CD with GitHub Actions: Automation for Happier Devs

Complete Guide to Installing and Configuring Apache2 on Ubuntu 22.04

Python Automation for Daily Tasks: File Cleanup, Backups, and Automated Notifications

Linux Server Security Audit with Lynis: From Installation to a Hardening Index of 80+

Docker Volumes: Persistent Data Storage That Survives Container Restarts

Whisper OpenAI: A Practical Guide to Speech-to-Text with Python

Optimizing PostgreSQL Queries with EXPLAIN ANALYZE: Analyzing and Improving Query Performance