Linux Hardening
Are you a Linux systems administrator seeking to learn the best practices for securing your network? In this Linux Hardening course, Corey Holzer walks you through hardening for the system level, services, and user account management and you apply these concepts in a series of secure virtual labs.
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Module 1: Linux Hardening Course Overview and Instructor Introduction
Module 2: Hardening in Theory
2.1Why We Harden
2.2Hardening-in-Depth as a Concept
2.3The CIS Benchmarks
2.4Hardening the Foundation
2.5Hardening Storage Devices
2.6Firewalls and IPS/IDS as Endpoint Security
2.7Managing Services
2.8Lifecycle Management
2.9Recommendations for Integrating Hardening Measures
Module 3: System Hardening in Practice
3.1Hardening the Hardware
3.2Hardening the Bootloader
3.3Securing the Bootloader (Lab)
3.4Securing the Kernel
3.6Securing the Kernel (Lab)
3.7Securing Storage Devices Part 1
3.8Securing Storage Devices Part 2
3.9Disabling SUID and SGID Permissions (Demo)
3.10Making the /boot Volume Read-Only (Lab)
3.11Blocking Unwanted Activities and Traffic
3.12Protecting Storage Devices (Lab)
3.13Minimizing the OS Attack Surface Part 1
3.14Minimizing the OS Attack Surface Part 2
3.15Reducing the Attack Surface on a Server (Lab)
3.16Network Hardening at the Host
3.17Network Hardening at the Host (Lab)
3.18System Administration Hardening
3.19Hardening Administration through sudo (Lab)
3.20Testing, Monitoring, and Reviewing
3.21Log Management (Lab)
Module 4: Services Hardening in Practice
4.1General Handling of Services Part 1
4.2General Handling of Services Part 2
4.3Basic Handling of Services (Lab)
4.4Hardening Public-Facing Services
4.5Hardening the Secure Shell (SSH) Service Part 1
4.6Limiting Logins through SSH (Demo)
4.7Hardening the Secure Shell (SSH) Service Part 2
4.8Hardening SSH Services (Lab)
Module 5: Accounts Hardening in Practice
5.1User Password Authentication Requirements
5.2Alternate User Authentication Requirements
5.4Account Management Requirements
5.5Hardening User Accounts (Lab)
5.6Reviewing Accounts
5.7Managing User Accounts (Lab)
Module 6: Course Review and What's Next
Who should take this course?
Our Linux Hardening course is designed for an intermediate-level learner with Linux system administration experience who is interested in learning more about how to secure their network.
What are the prerequisites for this course?
You will gain the most benefit from this course if you have familiarity with the Linux command-line and the Linux filesystem structure.
Why should I take this course?
Our Linux Hardening course will equip you with the knowledge and skills you need to secure your network. You’ll be able to articulate the best practices to secure the operating system, services, and user account administration when building a Linux server or workstation.
What makes this course different from other courses on similar topics?
This course was developed by Corey Holzer, who holds a PhD in Information Security as well as an MBA and Master's in Information Security. He has worked in network security and web development for years. He holds the CISSP, CRISC, CEH, CNDA, and Security+. In the course, Corey not only provides the theory on why it is important to harden your system but also provides guided demonstrations and hands-on labs so learners can apply what they’ve learned.
Why should I take this course on Cybrary and not somewhere else?
Our Linux Hardening course enables you to learn from one of the foremost experts in the field and apply what you have learned in hands-on labs. Our on-demand format affords you the flexibility to learn at your own pace and on your own schedule.

Corey Holzer
Information Systems Engineer


Complete this entire course to earn a Linux Hardening Certificate of Completion