AWS的權限被拒絕（公鑰）

Question

我想連接到我的EC2實例並獲得以下錯誤。

命令我運行命令ssh -v -i key.pem Ubuntu的@我的實例地址]

我改變了密鑰文件的權限到600，因爲我在其他線程所看到的，但沒有解決問題。

輸出我得到：

OpenSSH_5.9p1, OpenSSL 0.9.8r 8 Feb 2011 
debug1: Reading configuration data /etc/ssh_config 
debug1: /etc/ssh_config line 20: Applying options for * 
debug1: Connecting to ec2-54-247-2-128.eu-west-1.compute.amazonaws.com [54.247.2.128] port 22. 
debug1: Connection established. 
debug1: identity file /Users/avimeir/.ssh/id_rsa type 1 
debug1: identity file /Users/avimeir/.ssh/id_rsa-cert type -1 
debug1: identity file /Users/avimeir/.ssh/id_dsa type -1 
debug1: identity file /Users/avimeir/.ssh/id_dsa-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_5.9 
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 ae:42:29:3d:3e:c0:a8:04:7f:19:9c:c0:52:00:a4:1e 
debug1: Host 'ec2-54-247-2-128.eu-west-1.compute.amazonaws.com' is known and matches the RSA host key. 
debug1: Found key in /Users/avimeir/.ssh/known_hosts:4 
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/avimeir/.ssh/id_rsa 
debug1: Authentications that can continue: publickey 
debug1: Offering RSA public key: ninja.pem 
debug1: Authentications that can continue: publickey 
debug1: Trying private key: /Users/avimeir/.ssh/id_dsa 
debug1: No more authentication methods to try. 
Permission denied (publickey). 

Answer 1

管理通過編輯/ etc/ssh_config中（在OSX）來解決它，並添加以下行：

ChallengeResponseAuthentication yes 

Answer 2

一定要檢查：

1. 的SSH密鑰對文件

2. 用戶名。例如：root，ec2-user，ubuntu，...

3. 您的服務器的主機名。例如，如果你停止你的實例，它會得到一個新的IP地址。

如果您使用的是Ubuntu Cloud Guest官方圖片，可以查看Ubuntu EC2 Starter's Guide。