如果您正在从Bitnami运行AWS映像。用户名是bitnami。干杯!

查看我的调试并查看最后一个:

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ssh -v -i awsliferaysrta.pem.txt root@54.254.250.***
OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011
debug1: Reading configuration data /etc/ssh_config
debug1: /etc/ssh_config line 20: Applying options for *
debug1: Connecting to 54.254.250.*** [54.254.250.***] port 22.
debug1: Connection established.
debug1: identity file awsliferaysrta.pem.txt type -1
debug1: identity file awsliferaysrta.pem.txt-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_5.9p1 Debian-5ubuntu1.1
debug1: match: OpenSSH_5.9p1 Debian-5ubuntu1.1 pat OpenSSH_5*
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: Server host key: RSA 05:5c:78:45:c9:39:3a:84:fe:f8:19:5d:31:48:aa:5f
debug1: Host '54.254.250.***' is known and matches the RSA host key.
debug1: Found key in /Users/macbookpro/.ssh/known_hosts:2
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: Trying private key: awsliferaysrta.pem.txt
debug1: read PEM private key done: type RSA
debug1: Authentication succeeded (publickey).
Authenticated to 54.254.250.*** ([54.254.250.***]:22).
debug1: channel 0: new [client-session]
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug1: Remote: Port forwarding disabled.
debug1: Remote: Agent forwarding disabled.
debug1: Remote: X11 forwarding disabled.
debug1: Remote: Forced command.
debug1: Sending environment.
debug1: Sending env LANG = en_US.UTF-8
Please login as the user "bitnami" rather than the user "root".

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现在是:

ssh -v -i ec2-keypair.pem ec2-user@[yourdnsaddress]

也有同样的问题。当试图用“ec2-user”或“root”登录时，拒绝权限(publickey)。

谷歌机器镜像的AMI编号，它有SSH登录信息正确他们在Debian维基页面。

希望这能有所帮助。

如果pem文件权限太开放，它也会报错。Chmod文件到600来修复这个问题。

这招对我很管用:

ssh-keygen -R <server_IP>

删除存储在工作站上的旧密钥 也与而不是

然后做同样的SSH再次工作:

ssh -v -i <your_pem_file> ubuntu@<server_IP>

在ubuntu实例中，用户名是:ubuntu 在Amazon Linux AMI上，用户名是:ec2-user

我不需要从映像重新创建实例。

它的ec2-user用于Amazon Linux AMI, ubuntu用于ubuntu映像。 此外，RHEL 6.4和更高版本的ec2-user RHEL 6.3及更早版本的root Fedora ec2-user Centos的根