Security – Page 5 – ITFROMZERO

Linux Disk Encryption with LUKS: Protecting Data When Your Server Is Lost or Stolen

By admin March 1, 2026

LUKS enables AES-256 encryption on Linux partitions, ensuring data remains unreadable even if the drive is physically removed from the server. This guide walks through the full workflow — from formatting and mounting, to auto-mount on boot, LUKS header backup, and passphrase management.

Security

Certbot SSL Certificate: Install and Auto-Renew in 5 Minutes

By admin March 1, 2026

A practical guide to using Certbot to issue and manage free SSL certificates from Let's Encrypt. From a quick 5-minute setup to automatic renewal and troubleshooting common errors on Linux servers.

Security

Detecting and Responding to a Hacked Server: A Practical Step-by-Step Guide

By admin February 28, 2026

A step-by-step guide to detecting and responding to a compromised Linux server: from manual command-line inspection and rootkit scanning with rkhunter/chkrootkit, to server isolation and setting up Fail2ban for long-term defense. Includes real commands and hands-on experience.

Security

Complete Guide to Installing and Configuring OpenVPN on Ubuntu Server from A to Z

By admin February 28, 2026

A complete guide to installing and configuring OpenVPN on Ubuntu Server, covering everything from CA creation and client certificate signing to split tunneling configuration and security hardening tips drawn from real-world server audits.