title: Permission Denied (publickey) when trying to SSH to Amazon EC2 server
body: <p>I am getting permission denied (public key) while doing a ssh to amazon machine. Here is the verbose output</p>
  
  <pre><code>OpenSSH_5.8p1 Debian-7ubuntu1,
  OpenSSL 1.0.0e 6 Sep 2011
  debug1: Reading configuration data /etc/ssh/ssh_config
  debug1: Applying options for *
  debug1: Connecting to 46.137.248.46 [46.137.248.46] port 22.
  debug1: Connection established.
  debug1: identity file Desktop/tws/new_key.pem type -1
  debug1: identity file Desktop/tws/new_key.pem-cert type -1
  debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3
  debug1: match: OpenSSH_5.3 pat OpenSSH*
  debug1: Enabling compatibility mode for protocol 2.0
  debug1: Local version string SSH-2.0-OpenSSH_5.8p1 Debian-7ubuntu1
  debug1: SSH2_MSG_KEXINIT sent
  debug1: SSH2_MSG_KEXINIT received
  debug1: kex: server-&gt;client aes128-ctr hmac-md5 none
  debug1: kex: client-&gt;server aes128-ctr hmac-md5 none
  debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024&lt;1024&lt;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 20:0f:a7:ea:b6:70:4f:ca:d0:d4:1c:31:2d:b2:08:71
  debug1: Host '46.137.248.46' is known and matches the RSA host key.
  debug1: Found key in /home/cs1090174/.ssh/known_hosts:43
  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: cs1090174@aurora
  debug1: Authentications that can continue: publickey
  debug1: Trying private key: Desktop/tws/new_key.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).
  </code></pre>
  
  <p>What can be the possible error? Thanks in advance for replying.</p>