how to add aws ec2 ssh user

ec2——network & security——key pairs——create key pair:

ssh-keygen -f chenshi.pem -y > chenshi.pub
useradd chenshi
cat chenshi.pub >> /home/chenshi/.ssh/authorized_keys
chown chenshi -R /home/chenshi/
chmod 700 /home/chenshi/.ssh
chmod 600 /home/chenshi/.ssh/authorized_keys