linux server – ITFROMZERO – Share tobe shared!

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.