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Disable or Enable SSH Root Login and Limit SSH Access in Linux
https://www.tecmint.com/disable-or-enable-ssh-root-login-and-limit-ssh-access-in-linux/Add New User Accounts with SSH Access to an Amazon EC2 Linux Instance
https://aws.amazon.com/premiumsupport/knowledge-center/new-user-accounts-linux-instance/
General
Add New User Accounts with SSH Access to an Amazon EC2 Linux Instance
https://aws.amazon.com/premiumsupport/knowledge-center/new-user-accounts-linux-instance/The Difference Between EBS Snapshots and AMI Images
https://help.skeddly.com/en/articles/1295444-the-difference-between-ebs-snapshots-and-ami-imagesInstances and AMIs - Amazon Elastic Compute Cloud
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instances-and-amis.htmlCreating an Amazon EBS-Backed Linux AMI - Amazon Elastic Compute Cloud
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/creating-an-ami-ebs.htmlAmazon EC2 Key Pairs - Amazon Elastic Compute Cloud
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-key-pairs.html#replacing-lost-key-pairConnecting to Your Linux Instance from Windows Using PuTTY - Amazon Elastic Compute Cloud
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/putty.html