# SSH 접속 시 pem키 Bad Permission 오류 해결 방법
작성일자: 2024.01.24
AWS에서 EC2 생성 시 pem Key를 새로 생성한 후 해당 key로 ssh 접속을 시도하면 아래와 같이 오류가 발생한다.
imac@ip-11-222-333-222 Downloads % ssh -i "ops.pem" ubuntu@222.111.222.333
############################################################
## WARNING: UNPROTECTED PRIVATE KEY FILE! ##
############################################################
Permissions 0644 for 'ops.pem' are too open.
It is required that your private key files are NOT accessible by others.
This private key will be ignored.
Load key "ops.pem": bad permissions
ubuntu@ip-222-111-222-333: Permission denied (publickey).
imac@ip-11-222-333-222 Downloads %
이럴 때엔 pem Key을 chmod 명령어를 이용하여 수정하면 정상적으로 접속이 가능하다.
$ chmod 400 ./파일명.pemimac@ip-11-222-333-222 Downloads % chmod 400 ./ops.pem
imac@ip-11-222-333-222 Downloads % ssh -i "ops.pem" ubuntu@ip-222-111-222-333
Welcome to Ubuntu 22.04.3 LTS (GNU/Linux 6.2.0-1017-aws x86_64)
* Documentation: https://help.ubuntu.com
* Management: https://landscape.canonical.com
* Support: https://ubuntu.com/advantage
System information as of Tue Jan 23 05:23:14 UTC 2024
System load: 0.0 Processes: 103
Usage of /: 30.9% of 7.57GB Users logged in: 0
Memory usage: 26% IPv4 address for eth0: 222.111.222.333
Swap usage: 0%
Expanded Security Maintenance for Applications is not enabled.
44 updates can be applied immediately.
26 of these updates are standard security updates.
To see these additional updates run: apt list --upgradable
Enable ESM Apps to receive additional future security updates.
See https://ubuntu.com/esm or run: sudo pro status
The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.
To run a command as administrator (user "root"), use "sudo ".
See "man sudo_root" for details.
ubuntu@ip-222-111-222-333:~$