Recover and Connect to AWS EC2 Instance if SSH Key is Lost | Step-by-Step Recovery Guide

In this tutorial, learn how to recover access to your AWS EC2 instance even if you’ve lost your SSH key pair 🔑.
Losing an SSH key can lock you out of your EC2 instance, but AWS provides safe methods to regain access — and this video shows you exactly how to do it!

Commands:

ssh-keygen -t rsa

cd .ssh

ssh-keygen -p -m PEM -f id_rsa

cp id_rsa.pub authorized_keys

cat id_rsa

💡 What You’ll Learn:

Understanding SSH key pairs in AWS

Common reasons for losing SSH access

Methods to recover EC2 instance access:

Using EC2 Instance Connect

Attaching the root volume to another instance

Creating a new key pair and updating authorized keys


Safely reconnecting to the recovered instance


📘 Course Reference:
Part of Solution Architecture Lab (23UPCSC2E26) – Elective Course III, M.Sc. Computer Science (III Semester).

🎯 Outcome:
By the end of this video, you’ll be able to regain access to an EC2 Linux instance securely and understand how to prevent SSH key loss in the future.


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🔖 Hashtags:

#AWS #EC2 #SSHKey #AWSTutorial #RecoverEC2 #AWSHandsOn #SolutionArchitectureLab #CloudComputing #MScComputerScience #AWSRecovery #EC2Access #CloudSecurity


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