How do I find the OS of a running EC2 instance?

There are multiple ways you can find the OS of a running EC2 instance.

  1. Using instance screenshot

Step 1: Log in to the AWS management console.

Step 2: Navigate to the EC2 service and select your EC2 instance.

Step 3: Click Actions > Monitor and troubleshoot > Get instance screenshot

Using System Manager (SSM):

If SSM agent is installed in your EC2 instance then you can query the EC2 instance OS information using AWS CLI for SSM