Trying to use RSA Keys to SSH into EC2, Getting: Incorrect RSA1 identifier… permission denied (public key)

Question

I have created a Ubuntu 12.04 instance on Amazon EC2.

I have downloaded the PEM file and am able to SSH into the instance, no problem.

Now, I want to create som

Answer 1

This kind of situation is normal, it's not weird.
The message you got:

debug3: Incorrect RSA1 identifier
debug3: Could not load "/home/user_name/.ssh/id_rsa" as a RSA1 public key

does not indicate an error, indeed.
RSA1 public key is only used in SSH protocol 1, which is already out of date. Nowadays, SSH protocol 2 is mostly used.

During a normal SSH login process, you will most probably see that warning message with ssh -vvv.
You will probably feel surprised, but don't worry, it's normal.

reference:
https://bbs.archlinux.org/viewtopic.php?id=122646, #9