Linux Server Hardening Checklist. This item is unavailable.Linux Server Hardening Checklist

Linux Server Hardening Checklist is a practical, no-nonsense reference for system administrators, students, developers, DevOps engineers, and anyone responsible for running a Linux server.

Instead of overwhelming you with security theory, this book breaks Linux server hardening into 100 practical, numbered steps that you can use during a server build, security review, or routine maintenance.

You’ll learn how to:

• Harden SSH and user access controls
• Reduce unnecessary network exposure and configure firewalls
• Keep Ubuntu, RHEL, and CentOS Stream systems properly patched and updated
• Strengthen file permissions and filesystem security
• Identify and lock down unnecessary services and daemons
• Configure and understand logging and auditing
• Improve monitoring and endpoint security
• Prepare reliable backups and recovery procedures
• Review important security settings using a 100-point checklist
• Quickly find commonly used commands in the Quick Command Reference

The book explains not only what to change, but also why the change matters, helping you understand the security risk behind each recommendation.

Commands and configuration examples are presented with the differences between Ubuntu/Debian-based systems and RHEL/CentOS Stream systems clearly identified where applicable.

Whether you're hardening a single home-lab server, managing production infrastructure, studying for a Linux or security certification, or simply trying to build safer Linux systems, this checklist gives you a structured starting point.

Practical. Repeatable. Focused on the settings that matter.

2026 Edition