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Mastering firewalld on Fedora: From Zone Management to Rich Rules Pro Tips

By admin March 30, 2026

Enhance your Fedora server security with this in-depth firewalld guide. Learn how to use Zones, Services, and Rich Rules to block IPs and limit connection rates effectively.

Ubuntu

Installing PostgreSQL on Ubuntu 22.04: From Zero to Production Deployment

By admin March 29, 2026

Learn how to professionally install and configure PostgreSQL on Ubuntu 22.04. A guide to creating users, securing remote connections, and managing disk space effectively.

Ubuntu

Mastering Netplan on Ubuntu: From Static IP to Professional Bridge and Bond Configurations

By admin March 29, 2026

Detailed guide on configuring Netplan on Ubuntu for static IP, Bridge, and Bonding. Practical tips to help IT engineers avoid YAML errors and manage server networking efficiently.

Linux

How to Configure sudo and the sudoers File on Linux: Safe Permission Management for Each User

By admin March 15, 2026

A comparison of 3 approaches to granting sudo access on Linux: adding users to the wheel/sudo group, editing /etc/sudoers directly, or using /etc/sudoers.d/. Covers the pros and cons of each approach along with practical configuration guides using visudo, Command Aliases, and NOPASSWD for team-based production environments.

Network

How to Use nmap for Network Scanning and Linux Server Security Auditing

By admin March 6, 2026

A practical guide to using nmap for port scanning, service detection, and Linux server security auditing — drawn from real infrastructure management experience. Covers basic commands, NSE scripts, and an automation script for weekly audits.

Linux

Automating Backups with Cron Jobs on Linux: Real Scripts from Production

By admin March 3, 2026

A guide to setting up automated backups on Linux with cron jobs: complete scripts for MySQL, config files, and user uploads, with integrity verification and failure alerts. Real-world experience from managing multiple production VPS instances.

Ubuntu

Installing LAMP Stack on Ubuntu 22.04 — A Step-by-Step Guide for Beginners

By admin March 3, 2026

A step-by-step guide to installing LAMP Stack (Apache, MySQL, PHP) on Ubuntu 22.04, including Virtual Host configuration, creating a secure database user, and verifying the full stack end-to-end. Perfect for developers who are new to deploying PHP applications on a server.

Fedora

Installing Fedora Server and Initial Configuration: Steps You Cannot Skip

By admin March 1, 2026

A practical guide to installing Fedora Server and configuring it correctly from the start, covering user creation, SSH key-based lockdown, firewalld configuration, keeping SELinux enabled, and installing fail2ban. Compiled from real-world experience after 6 months running in production.

Ubuntu

Things to Do After Installing Ubuntu Server 22.04 to Avoid 2 AM Disasters

By admin February 28, 2026

A practical checklist of what to do right after installing Ubuntu Server 22.04: secure SSH with key-based authentication, enable UFW firewall, create a swap file, configure timezone, and set up Fail2ban — all distilled from real-world production incident experience.