I am trying to do ssh in my AWS instance. But I am getting this error.
C:\Users\Akhtar\Downloads>ssh -l ec2-user 126.96.36.199 -i myfirstkey.ppk
The authenticity of host '188.8.131.52 (184.108.40.206)' can't be established.
ECDSA key fingerprint is SHA256:HtO4bkrMd+bieuGVGZ9SKAFxQn4lGQU270cs0hUQjpU.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '220.127.116.11' (ECDSA) to the list of known hosts.
Load key "myfirstkey.ppk": invalid format
email@example.com: Permission denied (publickey,gssapi-keyex,gssapi-with-mic).
Can anyone tell me why I am getting this error?