結論、これで一発解決 ssh -i /path/to/private-key.pem username@public-ip-address ここ lightsail.aws.amazon.com 11 PocketsConnect to your Linux or Unix instance using SSH in terminal | Lightsail Docu...https://lightsail.aws.amazon.com/ls/docs/en_us/articles/amazon-lightsail-ssh-using-terminal