我最近在AWS EC2上安装了这个堆栈：https://aws.amazon.com/marketplace/pp/B00NO1HJ56/ref=srh_res_product_title?ie=UTF8&sr＝0-2&qid=1461119036279
实例的系统日志显示SSH密钥安装在这里：
Generating public/private rsa key pair.
Your identification has been saved in /etc/ssh/ssh_host_rsa_key.
Your public key has been saved in /etc/ssh/ssh_host_rsa_key.pub.
我已经将公钥添加到我的Github帐户中，并且指纹匹配
克隆repo时，我得到：权限被拒绝（公钥）。
来自Github帮助部分https://help.github.com/articles/error-permission-denied-publickey
我运行：ssh-vTgit@github.com并得到：
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: /etc/ssh/ssh_config line 56: Applying options for *
debug1: Connecting to github.com [192.30.252.122] port 22.
debug1: Connection established.
debug1: identity file /home/bitnami/.ssh/id_rsa type -1
debug1: identity file /home/bitnami/.ssh/id_rsa-cert type -1
debug1: identity file /home/bitnami/.ssh/id_dsa type -1
debug1: identity file /home/bitnami/.ssh/id_dsa-cert type -1
debug1: identity file /home/bitnami/.ssh/id_ecdsa type -1
debug1: identity file /home/bitnami/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/bitnami/.ssh/id_ed25519 type -1
debug1: identity file /home/bitnami/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.6
debug1: Remote protocol version 2.0, remote software version libssh-0.7.0
debug1: no match: libssh-0.7.0
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-sha1 none
debug1: kex: client->server aes128-ctr hmac-sha1 none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: RSA 16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48
debug1: Host 'github.com' is known and matches the RSA host key.
debug1: Found key in /home/bitnami/.ssh/known_hosts:1
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: /home/bitnami/.ssh/id_rsa
debug1: Trying private key: /home/bitnami/.ssh/id_dsa
debug1: Trying private key: /home/bitnami/.ssh/id_ecdsa
debug1: Trying private key: /home/bitnami/.ssh/id_ed25519
debug1: No more authentication methods to try.
我觉得ssh代理正在搜索/home/bitnami/.ssh/，但密钥位于/etc/ssh-中
这是/home/bitnami/.ssh 的内容
authorized_keys
known_hosts
这是/etc/ssh-的内容
moduli
ssh_host_dsa_key
ssh_host_ecdsa_key.pub
ssh_host_rsa_key
ssh_config
ssh_host_dsa_key.pub
ssh_host_ed25519_key
ssh_host_rsa_key.pub
sshd_config
ssh_host_ecdsa_key
ssh_host_ed25519_key.pub
ssh_import_id
如果我检查添加到ssh代理的密钥，我会得到：
$ ssh-add -l I get:
The agent has no identities.
这只是通过使用ssh-add将/etc/ssh/中的公钥添加到ssh代理中的问题吗，这样它就知道该在哪里查找了？
我不明白为什么密钥没有安装在/etc/hosts而不是主目录中。
解决方案只是忽略/etc/ssh中的密钥。这些密钥由AWS用来访问实例，并且属于系统而不是用户。
所以我刚刚为bitnami用户生成了新的密钥，这些密钥现在正确地位于/home/.ssh/中
我现在可以从Github中提取我的回购。