Mastering linux security and hardening : a practical guide to protecting your linux system from cyber attacks / Donald A. Tevault.

Includes index.

Section I: Setting up a secure Linux system -- Running Linux in a virtual environment -- Securing administrative user accounts -- Securing normal user accounts -- Securing your server with a firewall - part 1 -- Securing your server with a firewall - part 2 -- Encryption technologies -- SSH hardening -- Section II: Mastering file and directory access control (DAC) -- Mastering discretionary access control -- Access control lists and shared directory management -- Section III: Advanced system hardening techniques -- Implementing mandatory access control with SELinux and AppArmor -- Kernel hardening and process isolation -- Scanning, auditing, and hardening -- Logging and log security -- Vulnerability scanning and intrusion detection -- Prevent unwanted programs from running -- Security tips and tricks for the busy bee.

"The third edition of Mastering Linux Security and Hardening is an updated, comprehensive introduction to implementing the latest Linux security measures, using the latest versions of Ubuntu and AlmaLinux. In this new edition, you will learn how to set up a practice lab, create user accounts with appropriate privilege levels, protect sensitive data with permissions settings and encryption, and configure a firewall with the newest firewall technologies. You'll also explore how to use sudo to set up administrative accounts with only the privileges required to do a specific job, and you'll get a peek at the new sudo features that have been added over the past couple of years. You'll also see updated information on how to set up a local certificate authority for both Ubuntu and AlmaLinux, as well as how to automate system auditing. Other important skills that you'll learn include how to automatically harden systems with OpenSCAP, audit systems with auditd, harden the Linux kernel configuration, protect your systems from malware, and perform vulnerability scans of your systems. As a bonus, you'll see how to use Security Onion to set up an Intrusion Detection System. By the end of this new edition, you will confidently be able to set up a Linux server that will be secure and harder for malicious actors to compromise."