Is there a need for a question (or set of questions) and answers around SSH publickey refusal queries?

For stuff like,

• Permission denied (publickey). SSH from local Ubuntu to Amazon EC2 server
• Permission denied (publickey) when trying to ssh into an ec2 machine (-v details included)
• ssh error with publickey for normal user
• Permission denied (publickey) error
• Not able to do ssh(without asking passowrd) to remote System using Authentication Keys
• EC2 instance always ask me to enter passphrase for the pem during connection

I was thinking along the lines of setting up key pairs, permissions, remembering to ssh in as the right user, using -v -v to get more diagnostics, settings in the sshd_config file, etc.

However, thinking about it further, I wondered how much of that is on-topic for ServerFault, rather than SuperUser or Linux/UNIX? Just thought I'd gather some opinions.