AWS EC2 : permission denied public key

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문제 발생 : SCP 파일 이동 실패 permission denied

• 로컬 JAR 파일 EC2 서버로 이동시키기 위한 SCP 명령어 실행
• scp [/path/file.txt] [user-name]@[destination-host]:[destination-path]

문제상황 : 로그 permission denied (public key) 키 설정을 의심

• 로컬 ~/.ssh/config 설정 완료한 상태

Host [host]
HostName [89.xx.xxx.xxx]
User [ec2-user]
PreferredAuthentications [publickey]
IdentityFile [~/.ssh/keypair-name]

• SCP 실행 실패로 상세 로그 정보를 확인하기 위해 ssh -vvv 옵션 사용
• 주 로그내용
  
  • key_load_public : No such file or directory
• 구글링 결과 별도 공개키를 단순히 못 찾아 발생하는 로그로 확인
• 다음 의심되는 로그내용
  
  • "we sent a public key packet, wait for reply"
  • 로컬은 서버로 public key 패킷을 전송하고 응답을 기다리고 있다는 로그내용 확인
  • EC2 서버에서 public key receive 정상처리 되었을 때 로그 기록이 어떻게 되는지 찾는 과정에서 사용자 이름이 잘못 입력된 것을 확인

문제 해결 : 사용자 이름 User 값으로 입력하여 SCP 명렁어 실행

• 로컬 ~/.ssh/config 파일 Host 값을 사용자 이름으로 입력하고 있었다.
• 사용자 이름 값 “User”로 올바르게 입력한 SCP 명령어 실행 결과 파일이동 성공
• scp [/path/file.txt] [~/.ssh/config 파일에 User 값
]@[destination-host]:[destination-path]

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