[cs615asa] Permission denied (publickey) on every new instance

[hyan2]

Hi Professor,

I created a new instance, use the same key pair of another 
instance(Omni OS). That key pair works well when I ssh to Omni OS but 
got Permission denied (publickey) error on every new instance I created. 
I searched many solutions from internet but they didn't work for me.

The following is the output of ssh, its wired here:

debug1: Trying private key: id_rsa-hyan2-keypair
debug1: PEM_read_PrivateKey failed
debug1: read PEM private key done: type <unknown>

It seems that my private key is wrong. But when I connected to Omni OS, 
I also got this log file but it works well. This key is generated from 
ec2-add-keypair hyan2-keypair. It just copy it into a plaintext file.
-------------------------------------------------
OpenSSH_5.6p1, OpenSSL 0.9.8r 8 Feb 2011
debug1: Reading configuration data /etc/ssh_config
debug1: Applying options for *
debug1: Connecting to ec2-184-72-89-154.compute-1.amazonaws.com 
[184.72.89.154] port 22.
debug1: Connection established.
debug1: identity file id_rsa-hyan2-keypair type -1
debug1: identity file id_rsa-hyan2-keypair-cert type -1
debug1: Remote protocol version 2.0, remote software version 
OpenSSH_5.9p1 Debian-5ubuntu1
debug1: match: OpenSSH_5.9p1 Debian-5ubuntu1 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.6
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 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: Host 'ec2-184-72-89-154.compute-1.amazonaws.com' is known and 
matches the RSA host key.
debug1: Found key in /Users/hanyan/.ssh/known_hosts:12
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/hanyan/.ssh/created_keypair.pem
debug1: Authentications that can continue: publickey
debug1: Trying private key: id_rsa-hyan2-keypair
debug1: PEM_read_PrivateKey failed
debug1: read PEM private key done: type <unknown>
debug1: No more authentication methods to try.
Permission denied (publickey).

If I use Amazon's web based tools to launch a new instances and choose 
to generate a new keypair for the new instance. I download that private 
key and use it to ssh to such instance. I also got this problem. Here is 
the output:
---------------------------------------------------------------------------------
OpenSSH_5.6p1, OpenSSL 0.9.8r 8 Feb 2011
debug1: Reading configuration data /etc/ssh_config
debug1: Applying options for *
debug1: Connecting to ec2-23-22-179-129.compute-1.amazonaws.com 
[23.22.179.129] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: identity file /Users/hanyan/.ssh/created_keypair.pem type -1
debug1: identity file /Users/hanyan/.ssh/created_keypair.pem-cert type 
-1
debug1: Remote protocol version 2.0, remote software version 
OpenSSH_5.9p1 Debian-5ubuntu1
debug1: match: OpenSSH_5.9p1 Debian-5ubuntu1 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.6
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 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: Host 'ec2-23-22-179-129.compute-1.amazonaws.com' is known and 
matches the RSA host key.
debug1: Found key in /var/root/.ssh/known_hosts:6
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/hanyan/.ssh/created_keypair.pem
debug1: Authentications that can continue: publickey
debug1: Trying private key: /Users/hanyan/.ssh/created_keypair.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).
---------------------------------------------------------------------------------

Thank you for your help.

-Han