The problem

When I download the .pem file to ssh my AWS instance, I encountered the following error:

WARNING: UNPROTECTED PRIVATE KEY FILE!

Permissions 0640 for ‘blog.pem’ are too open. It is required that your private key files are NOT accessible by others. This private key will be ignored. bad permissions: ignore key: blog.pem Permission denied (publickey).

The Solution

Run this command in your terminal

ssh -i xxx.pem root@52.74.3.53

Replace xxx.pem with your .pem file name

This will change the keys to be only readable by you.


Originally published at victorleungtw.com on May 29, 2015.