Linux Security and Hardening

Apply security and Hardening and secure your server like Enterprise server with best practice and real life examples

What you will learn

Learn how to secure your server with best practice

Learn how Provisioning and building a Operation System

Learn how to hardening your server

Learn how to setup a log files and tracking any action used by system administration

Learn how to disable unwanted modules on your server

Learn how to set up a professional banner warning on your server

Learn how to remove unwanted pre-installed packages

Learn how to masked unwanted services


In computer security, hardening is usually the process of securing a system by reducing its surface of vulnerability, which is larger when a system performs more functions; in principle, a single-function system is more secure than a multipurpose one. Reducing available ways of attack typically includes changing default passwords, removal of unnecessary software, unnecessary usernames or logins, and disabling or removal of unnecessary services.

What is Hardening means:

Hardening, when applied to computing, is the practice of reducing a system’s vulnerability by reducing its attack surface.

Hardening may involve a reduction in attack vectors by culling the pathways, or vectors, attackers would use. It may range from adhering to blanket policies such as Zero Trust, the Principle of Least Privilege (PoLP), or Defense In Depth, but also manifest as certain task lists such as implementing workforce training, segmenting resources, automating security updates, resetting default passwords, hashing passwords, and ceasing to store or transmit data unless it is encrypted.

Reducing attack vectors through hardening also involves system owners cutting unnecessary services or processes. Overall, a system that provides more services has a much broader attack surface than one performing just one function.

In this course, You will learn how to hardening your  Unix and Linux systems.




What will learn from this course
Requirement for this course
Udemy Platform

Provisioning and building a Operation System

Install VMware Workstation or VirtualBox
Why need a separate partition
Create the VM and Download the OS
Install the OS
Claim our free space
Hardening our separate partition
Sticky bit on Partition

Setup a Banner

Why we need a banner
Setup a banner

Package and unwanted Modules

Why we Should Remove OR Installed
Package Should Remove OR Installed packages

Secure and Hardening SSH

Why need to secure and hardening your SSH
Secure and hardening your SSH

Security and PAM Modules

Security and PAM Modules Part 1
Security and PAM Modules Part 2
Security and PAM Modules Part 3

NTP and Timing sync

Why we need NTP
Setup NTP and Sync the Timing


Bonus Lecture

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