SSH: How to Fix the 'Unprotected Private Key' Error

The Problem

When I downloaded the .pem file to SSH into 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

To resolve this issue, run the following command in your terminal:

ssh -i xxx.pem root@52.74.3.53

Replace xxx.pem with the name of your .pem file.

This command will modify the permissions on the keys, making them readable only by you.