Ansible Lecture 9 | Key-Based Authentication | Secure SSH for Ansible (In English)

Automate with Ansible | Lecture 9 (100% practical session)

Key-Based Authentication | Secure SSH for Ansible

Password-based authentication is not secure and not suitable for automation.
In this lecture, we learn why DevOps engineers always prefer key-based authentication and how to configure it properly for Ansible automation.

🔹 Why NOT Password-Based Authentication?

• Vulnerable to brute-force attacks
• Requires manual password entry
• Not scalable for automation
• Unsafe for production environments

👉 Key-based authentication solves all these problems

🔹 What You’ll Learn in This Video
🔐 Key-Based Authentication Basics

• What is SSH key-based authentication
• Difference between password vs key-based login
• Public key & private key concept

🛠️ SSH Key Setup for Ansible

• Generate SSH key on control node
• Copy public key to target nodes
• Enable passwordless SSH login

⚙️ Using Ansible with SSH Keys

• Running Ansible without passwords
• Connecting using a normal user
• Verifying access using Ansible ping module

Example:
ansible all -m ping

🔒 Security Best Practices
• Disable password authentication
• Avoid root login
• Use sudo with privilege escalation
• Secure SSH permissions

🔹 Why This Lecture Is Important

• Required for secure automation
• Used in real production environments
• Mandatory for CI/CD pipelines
• Frequently asked in DevOps interviews

#Ansible #DevOps #Automation #Linux #SSH #Security #KeyBasedAuth #CloudComputing

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