Question 18265 in Amazon Web Sevices Question posted in
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What is "Amazon Linux 2023" default username? – Amazon Web Sevices

What is AWS ec2 "Amazon Linux 2023" default username?
‘ec2-user’ is not working

previous versions of Amazon Linux, including Amazon Linux 2, the default username is "ec2-user"

but ‘ec2-user’ is not working in 2023 version

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2

Answers


  1. 0

    You can always go to Connect > EC2 Instance Connect. The Username filled by AWS is usually the default one you can use to connect.

    I created an instance of Amazon Linux 2023 and ec2-user was the default username…

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  2. 0

    In case anyone else is struggling with this, deep in the Amazon Linux 2023 documentation, there’s a section that says RSA-based keys are not supported when connecting to Amazon Linux 2023 instances. In practical terms, this means that if you’re reusing an old key pair, it probably won’t work on new Amazon Linux 2023 instances.

    Unfortunately, the messaging surrounding this is pretty unclear – so it won’t be obvious that you’re using the right username and key pair but its being rejected based on the host key algorithm.

    If this is happening to you, I suggest you generate a new key pair and give that a go.

    More info available here:
    https://docs.aws.amazon.com/linux/al2023/ug/ssh-host-keys-disabled.html

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