I am trying to do SSH in my instance. But it is showsing me the below error.
C:\Users\NADIM AKTHAR>ssh -l ec2-user 18.104.22.168 -i key123.pem
The authenticity of host '22.214.171.124 (126.96.36.199)' can't be established.
ECDSA key fingerprint is SHA256:FnoSXFNxXBt73s6wR3sXr57b4591FotlHugLqWFMDaw.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '188.8.131.52' (ECDSA) to the list of known hosts.
Load key "key123.pem": invalid format
email@example.com: Permission denied (publickey,gssapi-keyex,gssapi-with-mic).
How can I solve this?