Recently I figured out that Windows 10 has a built-in ssh application. Great! If you would like to connect to Linux PC using it, you need to use the following command:

ssh -i key.pem username@ipaddress_or_host

But if you will try to run it you will get following error:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

@         WARNING: UNPROTECTED PRIVATE KEY FILE!          @

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permissions for 'key.pem' are too open.
It is required that your private key files are NOT accessible by others.
This private key will be ignored.

It is a very strange error message. I would say it is the typical Linux way. A smart person will figure it out and a dumb person doesn’t need it. What it trying to tell,