As per Ben's answer, I created a key pair, downloaded the private key into ~/.ssh , changed the permissions to 600 and tried to ssh the instance ... but got unauthorized erro :
$ ssh -v -i ~/.ssh/aws-erwin16.pem [email protected]
OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011
debug1: Reading configuration data /Users/jack/.ssh/config
debug1: Reading configuration data /etc/ssh_config
debug1: /etc/ssh_config line 20: Applying options for *
debug1: Connecting to ec2-nn-nn-nnn-nnn.us-west-2.compute.amazonaws.com [54.69.113.179] port 22.
debug1: Connection established.
debug1: identity file /Users/jack/.ssh/aws-erwin16.pem type -1
debug1: identity file /Users/jack/.ssh/aws-erwin16.pem-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.2
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1p1 Ubuntu-2ubuntu2
debug1: match: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2 pat OpenSSH*
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr [email protected] none
debug1: kex: client->server aes128-ctr [email protected] none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: RSA 85:e4:69:56:21:4d:32:1c:e9:5c:83:a5:cc:28:03:39
debug1: Host 'ec2-nn-nn-nnn-nnn.us-west-2.compute.amazonaws.com' is known and matches the RSA host key.
debug1: Found key in /Users/jack/.ssh/known_hosts:22
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /Users/jack/.ssh/id_rsa
debug1: Authentications that can continue: publickey
debug1: Trying private key: /Users/jack/.ssh/aws-erwin16.pem
debug1: read PEM private key done: type RSA
debug1: Authentications that can continue: publickey
debug1: No more authentication methods to try.
Permission denied (publickey).
if I change the user name for ubuntu , and it runs fine... get connecte d..;
You have confused the X.509 Certificates with the Amazon EC2 Keypairs. EC2 Keypairs are used to log in to EC2 instances.
In the EC2 console, find the keypairs section on the left, generate a keypair, and save the private key locally to your disk. OpenSSH searches the ~/.ssh directory by default. Run chmod 600 ~/.ssh/<filename> to set the correct permissions. You can then use that key to access your instance via SSH.
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