SSH Key Authentication: Create Private & Public Keys for AWS Linux Instances (2026)
Still using passwords to log into your servers? In Chapter 6 of our DevOps Roadmap 2026, we are mastering SSH Key Authentication. This is the industry standard for securing AWS EC2 instances, Azure VMs, and automated pipelines.
In this tutorial, I break down the Public and Private Key pair concept and show you exactly how to set up passwordless login using the two most popular methods:
1️⃣ PuttyGen (Perfect for Windows users)
2️⃣ SSH-Keygen (The standard for Linux/Mac Terminals)
🚀 What You Will Learn:
🔥 What is SSH Key Authentication? (Public vs. Private Keys)
🔥 How to generate SSH Keys using PuttyGen.
🔥 How to generate SSH Keys using the ssh-keygen command.
🔥 How to use these keys to access your AWS Linux Instances.
📌 Video Chapters (Quick Navigation):
0:00 - Introduction to Passwordless Login
0:14 - Why SSH Keys are Mandatory for DevOps 2026
1:18 - Security 101: The Importance of SSH Key Pairs
3:00 - How Public & Private Keys Work Together (The Concept)
5:05 - Method 1: How to Generate SSH Keys using PuttyGen (Windows)
13:49 - Method 2: Creating SSH Keys via SSH-Keygen (Linux/Terminal)
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