我有一个从市场购买的Wowza实例，大约4个小时前，我能够连接它并对其进行一些操作。但是现在当我尝试连接时，它会给出“权限被拒绝”(“公钥”)错误。我使用chmod命令在./上赋予777权限，这是我认为的真正原因。

当我尝试将此实例的根卷附加到相同类型的其他实例时，从this solution发出了相同的错误，但是当voulme分离时，它已成功连接。市场实例的数量只能附加到相似类型的实例。

现在如何更改该.ssh目录的权限？你能帮我一下吗。

这是我尝试连接实例时的日志:

OpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014 
debug1: Reading configuration data /etc/ssh/ssh_config 
debug1: /etc/ssh/ssh_config line 19: Applying options for * 
debug1: Connecting to 54.69.133.11 [54.69.133.11] port 22. 
debug1: Connection established. 
debug1: permanently_set_uid: 0/0 
debug1: identity file Desktop/Shivam/mypemfile.pem type -1 
debug1: identity file Desktop/Shivam/mypemfile.pem-cert type -1 
debug1: Enabling compatibility mode for protocol 2.0 
debug1: Local version string SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.8 
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1 
debug1: match: OpenSSH_6.6.1 pat OpenSSH_6.6.1* compat 0x04000000 
debug1: SSH2_MSG_KEXINIT sent 
debug1: SSH2_MSG_KEXINIT received 
debug1: kex: server->client aes128-ctr hmac-md5-etm@openssh.com none 
debug1: kex: client->server aes128-ctr hmac-md5-etm@openssh.com none 
debug1: sending SSH2_MSG_KEX_ECDH_INIT 
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY 
debug1: Server host key: ECDSA 6a:48:f5:14:13:9a:a1:79:e8:44:bb:0d:6b:8d:b7:59 
The authenticity of host '54.69.133.11 (54.69.133.11)' can't be established. 
ECDSA key fingerprint is 6a:48:f5:14:13:9a:a1:79:e8:44:bb:0d:6b:8d:b7:59. 
Are you sure you want to continue connecting (yes/no)? yes 
Warning: Permanently added '54.69.133.11' (ECDSA) to the list of known hosts. 
debug1: ssh_ecdsa_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: Desktop/Shivam/mypemfile.pem 
debug1: key_parse_private2: missing begin marker 
debug1: read PEM private key done: type RSA 
debug1: Authentications that can continue: publickey 
debug1: No more authentication methods to try. 
Permission denied (publickey). 

请您参考如下方法:

从AWS Marketplace启动的产品具有非市场实例不必强制执行许可的限制。您遇到了其中一项限制。
这是AWS论坛上可能有用的相关thread，尤其是该线程中的最后一篇文章:

If a volume has an AWS Marketplace product code:

• The volume can only be attached to a stopped instance.
• You must be subscribed to the AWS Marketplace code that is on the volume.
• The configuration (instance type, operating system) of the instance must support that specific AWS Marketplace code. For example, you cannot take a volume from a Windows instance and attach it to a Linux instance.
• AWS Marketplace product codes are copied from the volume to the instance.