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

对于Ubuntu实例:

chmod 600 ec2-keypair.pem
ssh -v -i ec2-keypair.pem ubuntu@ec2-174-129-185-190.compute-1.amazonaws.com

对于其他情况，你可能不得不使用ec2-user而不是ubuntu。

我所使用的大多数EC2 Linux映像默认只创建了根用户。

参见:http://www.youtube.com/watch?v=WBro0TEAd7g

Canonical发布的版本默认使用'ubuntu'用户，任何使用ubuntu映像登录这里的人都会遇到相同的问题。

现在是:

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

Ubuntu 10.04自带openSSH

具体用法如下:

ssh -v -i [yourkeypairfile] ec2-user@[yourdnsaddress]

例如:

ssh -v -i GSG_Keypair.pem ec2-user@ec2-184-72-204-112.compute-1.amazonaws.com

上面的例子直接取自AWS教程，用于连接到Linux/UNIX机器: http://docs.amazonwebservices.com/AWSEC2/latest/GettingStartedGuide/

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:

*

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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