我知道这是一个常见的问题，但我相信我的情况并非常见。
我有一个ubuntu AWS EC2实例，我使用mac上的私钥访问它。
我想在工作时访问，所以我把密钥放在我的dropbox帐户中，并将其下载到我的工作(windows(pc上，放在C:/Users/[myusername]/.ssh目录中。我也喜欢chmod 600。
我将Gitshell用于ssh，因为它有ssh，我现在不想安装putty。
所以我运行命令
C:Users[myusername].ssh> ssh -v -i .key_pair.pem ubuntu@[redacted].compute.amazonaws.com
(当然要使用正确的dns名称。(
这是输出：
OpenSSH_4.6p1, OpenSSL 0.9.8e 23 Feb 2007
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to [redacted].compute.amazonaws.com [[redacted]] port 22.
debug1: Connection established.
debug1: identity file .\key_pair.pem type -1
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*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_4.6
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
Warning: Permanently added '[redacted].compute.amazonaws.com,[redacted]' (RSA) to the list of 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: Offering public key: C:\Users\[myusername]\.ssh\github_rsa
debug1: Authentications that can continue: publickey
debug1: Trying private key: .\key_pair.pem
debug1: read PEM private key done: type RSA
debug1: Authentications that can continue: publickey
debug1: No more authentication methods to try.
Permission denied (publickey).
我确信我使用的密钥是正确的，因为它在我的Mac上工作。还有什么我做错了吗？
编辑：我注意到调试输出提到：
debug1: Offering public key: C:\Users\[myusername]\.ssh\github_rsa
它提供一个不相关的公钥这一事实是否会影响身份验证？
.key_pair.pem错误。
将./key_pair.pem与Gitbash一起使用(无论您是否在windows上(