ec2 instance connect error - ssh - putty

Hi,

The following table shows the default username depending on the AMI used to launch the EC2 instance. (Source)

If you're using an AMI provided by a third party, you may need to check the documentation provided by the third party for the correct username. You can also check the EC2 console. To do this:

• Open the Amazon EC2 console, navigate to 'Instances', and select the instance.
• In the 'Description' tab, check the 'AMI ID' field.
• Use the AMI ID to find the corresponding AMI and its documentation, which should include the default username.

Please note that the username is case-sensitive. Also, remember to use the private key that corresponds to the key pair that you specified when you launched the instance. Each private key is unique for every region.