AWS EC2 I tried it and don't know why it doesn't work?
Example: ssh -i "bruce202101.pem" ec2-user@ec2-18-218-105-7.us-east-2.compute.amazonaws.com
cmd: D:\awskey>ssh -i "bruce202101.pem" ec2-user@ec2-18-218-105-7.us-east-2.compute.amazonaws.com The authenticity of host 'ec2-18-218-105-7.us-east-2.compute.amazonaws.com (18.218.105.7)' can't be established. ECDSA key fingerprint is SHA256:9N7GOCZxXLqE5+NGfIykiDDSP8G+jXwLDHHmDaiBhrc. Are you sure you want to continue connecting (yes/no)?