Linux and FreeBSD Security Tips: Practical Security Techniques for Hardening Linux and FreeBSD Systems in Modern Production Environments

Mastering FreeBSD and OpenBSD Security (O'Reilly Ser.)

FREEBSD 15 PKGBASE: REVOLUTIONARY PACKAGE-BASED SYSTEM MANAGEMENT: Migrate from freebsd-update to Modern pkg Workflow with Fine-Grained Installations and Quantum-Resistant Security

Linux Security Cookbook (Cookbooks Ser.)

Advanced Security Testing with Kali Linux