Setup SSH Public Key Credentials for imported instances

In fact, there are many prerequisites to be done before exporting VMDK file and import it into AWS. One of them is to configure a non-root user to use public key-based SSH to access your instance after it is imported. 

I haven't done it yet, so here's the thing I did after I imported my VM.

1. Login to instance using password method.
2. Create public key for my root account using the following script:

if [ ! -d /root/.ssh ] ; then
        mkdir -p /root/.ssh
        chmod 700 /root/.ssh
fi
# Fetch public key using HTTP
curl http://169.254.169.254/latest/meta-data/public-keys/0/openssh-key > /tmp/my-key
if [ $? -eq 0 ] ; then
        cat /tmp/my-key >> /root/.ssh/authorized_keys
        chmod 700 /root/.ssh/authorized_keys
        rm /tmp/my-key
fi

***This script can be applied to any user account.

3. Create private key from given public key pair you downloaded when you create an instance using putty gen.
4. Login with that private key and edit "/etc/ssh/sshd_config" file with these following conditions:

RSAAuthentication yes
PublicKeyAuthentication yes
AuthorizedKeysFile %h/.ssh/authorized_keys
PasswordAuthentication no
UsePAM no
PermitRootLogin without-password

5. Or you can create your own key for each account with the following command:

l2oxAz@localhost:~/$ ssh-keygen -t rsal2oxAz@localhost:~/$ ssh-copy-id l2oxAz@127.0.0.1