title: AWS SSH connection error: Permission denied (publickey)
body: <p>Im trying to connect to my EC2 instance with SSH and Iḿ getting crazy. I have read this post and tried all user combinations:</p>
  
  <p><a href="https://stackoverflow.com/questions/1454629/aws-ssh-access-permission-denied-publickey-issue">AWS ssh access &#39;Permission denied (publickey)&#39; issue</a> </p>
  
  <p>Its still not working for me. Any idea what am I missing?</p>
  
  <pre><code>  roberto@ubuntu:~/keys$ ssh -v -i ec2-key-pair.pem ec2-user@ec2-54-72-242-0.eu-west-1.compute.amazonaws.com
  OpenSSH_6.6, OpenSSL 1.0.1f 6 Jan 2014
  debug1: Reading configuration data /etc/ssh/ssh_config
  debug1: /etc/ssh/ssh_config line 19: Applying options for *
  debug1: Connecting to ec2-54-72-242-0.eu-west-1.compute.amazonaws.com [54.72.242.0] port 22.
  debug1: Connection established.
  debug1: identity file ec2-key-pair.pem type -1
  debug1: identity file ec2-key-pair.pem-cert type -1
  debug1: Enabling compatibility mode for protocol 2.0
  debug1: Local version string SSH-2.0-OpenSSH_6.6p1 Ubuntu-2ubuntu1
  debug1: Remote protocol version 2.0, remote software version OpenSSH_6.2
  debug1: match: OpenSSH_6.2 pat OpenSSH* compat 0x04000000
  debug1: SSH2_MSG_KEXINIT sent
  debug1: SSH2_MSG_KEXINIT received
  debug1: kex: server-&gt;client aes128-ctr hmac-md5-etm@openssh.com none
  debug1: kex: client-&gt;server aes128-ctr hmac-md5-etm@openssh.com none
  debug1: sending SSH2_MSG_KEX_ECDH_INIT
  debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
  debug1: Server host key: ECDSA e4:06:ee:a5:a5:d2:97:5f:0f:b7:06:5e:f2:b3:da:26
  debug1: Host 'ec2-54-72-242-0.eu-west-1.compute.amazonaws.com' is known and matches the ECDSA host key.
  debug1: Found key in /home/roberto/.ssh/known_hosts:3
  debug1: ssh_ecdsa_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: Trying private key: ec2-key-pair.pem
  debug1: key_parse_private2: missing begin marker
  debug1: read PEM private key done: type RSA
  debug1: Authentications that can continue: publickey
  debug1: No more authentication methods to try.
  Permission denied (publickey).
  
  UPDATE: 
  </code></pre>
  
  <p>According to @aldanux suggestions:</p>
  
  <pre><code>    roberto@ubuntu:~/keys$ ssh-keygen -R 54.72.242.0
  # Host 54.72.242.0 found: line 4 type ECDSA
  /home/roberto/.ssh/known_hosts updated.
  Original contents retained as /home/roberto/.ssh/known_hosts.old
  roberto@ubuntu:~/keys$ ssh -i ec2-key-pair.pem ec2-user@ec2-54-72-242-0.eu-west-1.compute.amazonaws.com
  Warning: Permanently added the ECDSA host key for IP address '54.72.242.0' to the list of known hosts.
  Permission denied (publickey).
  </code></pre>