Amazon EC2 ssh登录失败

Question

我正在尝试登录到我在EC2上的实例，但到目前为止还没有成功。我提供了所有相关命令和我尝试过的内容的输出。我已经做了我的家庭作业和环顾四周，我仍然无法解释为什么我无法登录。

密钥对是使用amazons AWS控制台在线生成的，我将私有文件下载到了本地。现在是600了。

$ ec2-describe-keypairs 
KEYPAIR gsg-keypair bb:ac:f0:5f:5b:c8:24:47:16:a8:93:35:37:1c:b3:c3:84:68:80:e1

$ ec2-run-instances ami-8d18f5e4 -k gsg-keypair
INSTANCE    i-2dcea041  ami-8d18f5e4            pending gsg-keypair 0   m1.small    2011-02-09T10:50:50+0000    us-east-1c  aki-a71cf9ce    ari-a51cf9cc        monitoring-disabled                 instance-store              xen 

$ ec2-describe instances
INSTANCE    i-2dcea041  ami-8d18f5e4    ec2-75-101-249-242.compute-1.amazonaws.com  domU-12-31-39-00-5D-D2.compute-1.internal   running gsg-keypair 0       m1.smal2011-02-09T10:50:50+0000 us-east-1c  aki-a71cf9ce    ari-a51cf9cc        monitoring-disabled 75.101.249.242  10.254.98.32            instance-store  

我还成功运行了ec2-authorize default -p 22。

ssh的输出为：

$ ssh -v -i id_rsa-gsg-keypair root@ec2-75-101-249-242.compute-1.amazonaws.com
OpenSSH_5.1p1 Debian-6ubuntu2, OpenSSL 0.9.8g 19 Oct 2007
debug1: Reading configuration data /etc/ssh/ssh_config  
debug1: Applying options for *
debug1: Connecting to ec2-75-101-249-242.compute-1.amazonaws.com [75.101.249.242] port 22.
debug1: Connection established.
debug1: identity file id_rsa-gsg-keypair type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.1p1 Debian-5
debug1: match: OpenSSH_5.1p1 Debian-5 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.1p1 Debian-6ubuntu2
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: kex: client->server aes128-cbc 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
The authenticity of host 'ec2-75-101-249-242.compute-1.amazonaws.com (75.101.249.242)' can't be established.
RSA key fingerprint is d0:ae:58:59:88:b8:58:ae:ab:dc:6f:a0:14:d5:f2:51.
Are you sure you want to continue connecting (yes/no)? yes
Failed to add the host to the list of known hosts (/home/meh/.ssh/known_hosts).
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: Trying private key: id_rsa-gsg-keypair
debug1: read PEM private key done: type RSA
debug1: Authentications that can continue: publickey
debug1: No more authentication methods to try.
Permission denied (publickey).

在这里，任何帮助都是非常感谢的。我已经尝试了一百万次，但还是搞不明白到底是怎么回事。

谢谢。

Answer 1

您可能会遇到权限错误：

Failed to add the host to the list of known hosts (/home/meh/.ssh/known_hosts)

确保您的用户帐户对文件/home/meh/.ssh/known_hosts具有写入权限

Answer 2

此外，您还需要使用用户'ubuntu‘。有关更多详细信息，请参阅pmagunia的文章：

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