How to log into the aws linux agents?

The windows login information is in the webpagetest documentation, however I’m having trouble finding how to log into the linux agents. I need to do so to troubleshoot cloudformation issues I’m seeing.

Does anyone know how to log into the linux agents?

The Linux login for AWS and GCE uses the normal ssh key process for specifying keys when you launch an instance (user: ubuntu).

Thanks Patrick. Using ubuntu for the username did the trick.