May 11, 2025

Mastering Linux Security and Hardening: A practical guide to protecting your Linux system from cyber attacks

28 minutes

This compilation of excerpts provides a comprehensive guide to Linux system security and hardening. It covers fundamental topics such as configuring virtual environments with VirtualBox for testing security measures, including networking setup and snapshot creation. The material explores essential security practices like managing user accounts and enforcing password policies, and also discusses using firewalls (UFW, firewalld, iptables, nftables) to protect servers. Additionally, the text examines encryption technologies (GPG, LUKS, eCryptfs, OpenSSL), methods for securing SSH access by disabling root logins and using key-based authentication, and implementing mandatory access control systems (SELinux, AppArmor). Finally, it addresses scanning, auditing, and malware detection using tools like OpenSCAP, auditd, and antivirus programs, along with procedures for system-level security, including bootloader protection.

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