If you are someone who's trying to access a AWS EC2 instance via SSH using a private key from a linux machine, you might have or will come across this error:

Permissions 0644 for 'your-aws-private-key.pem' are too open.
It is recommended that your private key files are NOT accessible by others.
This private key will be ignored.
bad permissions: ignore key: your-aws-private-key.pem
Permission denied (publickey).

Why am I getting this?

From what I have read, EC2 instances will simply not accept a private key that are publicly visible to others especially if it's somewhere stored in your Desktop or Downloads folder.

So basically, your private key should be accessible to others.

Oh, how can I fix it?

It's pretty straightforward, you just have to make sure that the private key is read-only like this:

chmod 400 your-aws-private-key.pem

After that, try connecting again and it should work fine!

Hope you found this tip useful!