WARNING: UNPROTECTED PRIVATE KEY FILE!

1 개요

WARNING: UNPROTECTED PRIVATE KEY FILE!

Permissions 0644 for 'hello.pem' are too open.

2 문제상황

root@zetawiki:~# ssh 135.79.246.80 -i abcd.pem
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@         WARNING: UNPROTECTED PRIVATE KEY FILE!          @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permissions 0644 for 'abcd.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 "abcd.pem": bad permissions
Permission denied (publickey).

3 조치

root@zetawiki:~# chmod 600 abcd.pem 
root@zetawiki:~# ssh 135.79.246.80 -i abcd.pem
Welcome to Ubuntu 16.04.2 LTS (GNU/Linux 4.4.0-83-generic x86_64)
... (생략)

4 같이 보기

• 리눅스 chmod
• 리눅스 ssh
• WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!
• WARNING: POSSIBLE DNS SPOOFING DETECTED!

5 참고

• https://www.howtogeek.com/168119/fixing-warning-unprotected-private-key-file-on-linux/