January 14, 2026

Mastering Linux Security and Hardening: Protect your Linux systems from intruders, malware attacks, and other cyber threats

18 minutes

A comprehensive guide to securing Linux systems. The author, an experienced Linux professional and trainer, details practical, hands-on techniques for enhancing system security. Topics covered include user account management and privilege control (sudo), configuring firewalls (iptables, nftables, firewalld), and implementing robust encryption methods (GPG, LUKS, SSL/TLS). The book also explores advanced access control mechanisms like SELinux and AppArmor, kernel hardening, and process isolation using tools such as Firejail, Docker, and Snap. Furthermore, it addresses the crucial areas of system auditing, vulnerability scanning with tools like Lynis, Nikto, and OpenVAS, and log management (rsyslog, journald) and security. This extensive manual is designed for individuals seeking to fortify their Linux environments against a wide array of threats.

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