How to connect to AWS EC2 instance if lost SSH key pair

Question

Hi,

Lost SSH private key to access production web server. After google result, I tried to follow two method with the following link at https://aws.amazon.com/premiumsupport/knowledge-center/user-data-replace-key-pair-ec2/

But both method 1 and 2 not work at all. Could you please help to figure out?

Method 1: Enter user-data. After config completed, using SSH and server refused the public key
Method 2: Use AWS Systems Manager. Unable to find runbook called AWSSupport-ResetAccess in Automation runbook

Roy

Accepted Answer

You can find step-by-step instructions in the EC2 User Guide under the Troubleshooting topic "I've lost my private key. How can I connect to my Linux instance?". 
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/TroubleshootingInstancesConnecting.html#replacing-lost-key-pair

Answer

Another method is to stop the instance; then mount the instance volume on another instance (you only have to run the second instance temporarily); replace the key file; then restart the first instance.

Here are some instructions - note that this is an external link; the content isn't produced by AWS: https://www.cloudtechtiq.com/blog/how-to-recover-key-file-aws-instance

Answer

Which AMI are you using?

How to connect to AWS EC2 instance if lost SSH key pair

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