sudo 400 /Users/kimgyeongmin/Downloads/sparta_aws.pem

Password:

sudo: 400: command not found

sudo chmod 400 /Users/kimgyeongmin/Downloads/sparta_aws.pem

ssh -i /Users/kimgyeongmin/Downloads/sparta_aws.pem ubunt@<ip>

>>>yes

Warning: Permanently added '<ip>' (ED25519) to the list of known hosts.

ubunt@<ip>: Permission denied (publickey).

구글링을 해보았지만 깔끔한 답변을 찾기가 어렵습니다

해결방법 부탁드립니다.