https://aws.amazon.com/premiumsupport/knowledge-center/ec2-linux-fix-permission-denied-errors/
sudo chmod 700 /home/ec2-user /home/ec2-user/.ssh
https://aws.amazon.com/premiumsupport/knowledge-center/ec2-linux-fix-permission-denied-errors/
sudo chmod 700 /home/ec2-user /home/ec2-user/.ssh