无法通过SSH连接到EC2

我下载了cert-xxx.pem和pk-xxx.pem文件以及keypair.pem，并将其全部移到我的Ubuntu客户机上的/.ssh文件夹中。

这是我在最后尝试使用-v进行SSH时所得到的结果

debug1：收到SSH2_MSG_SERVICE_ACCEPT debug1：可以继续的身份validation：publickey debug1：下一个身份validation方法：publickey debug1：尝试私钥：/root/.ssh/identity debug1：尝试私钥：/root/.ssh/id_rsa debug1：尝试私钥：/root/.ssh/id_dsa debug1：没有更多的身份validation方法来尝试。 权限被拒绝（publickey）。

我是pipe理服务器的新手，我想知道是否应该尝试将pem文件转换为id_rsa和id_dsa。 我不太确定这是否可能，但我不知道如何从这些pem文件中获取id_rsa，id_dsa，或者是否有任何解决办法。 我第一次设法访问EC2，这是我的第二次尝试，到目前为止我还没有成功。

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在login尝试失败之后添加日志

myvers@ubuntu:~$ ssh -v -i /home/myvers/.ssh/keyTwo.pem [email protected] OpenSSH_5.3p1 Debian-3ubuntu4, OpenSSL 0.9.8k 25 Mar 2009 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug1: Connecting to ec2-xxx-xxx-xxx-xx.compute-1.amazonaws.com xxx-xxx-xxx-xx port 22. debug1: Connection established. debug1: identity file /home/myvers/.ssh/keyTwo.pem type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3p1 Debian-3ubuntu4 debug1: match: OpenSSH_5.3p1 Debian-3ubuntu4 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.3p1 Debian-3ubuntu4 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-xxx-xxx-xxx-xx.compute-1.amazonaws.com' is known and matches the RSA host key. debug1: Found key in /home/myvers/.ssh/known_hosts:3 debug1: ssh_rsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received 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 public key: myvers@ubuntu debug1: Authentications that can continue: publickey debug1: Trying private key: /home/myvers/.ssh/keyTwo.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). 

 ssh -i /path/to/keypair.pem [email protected]