因此，我从 Web 启动了我的实例，下载了密钥对并安装了它，大约一天后一切都运行良好。然后我重新启动了计算机，但我无法再通过 SSH 进入它。我尝试重新下载密钥对并重新安装它，但我一直收到权限被拒绝（公钥）错误。
这是详细输出（我也尝试过使用 -i /path/to/keypair 选项，但没有成功）：
debug1: Reading configuration data /etc/ssh_config
debug1: Applying options for *
debug1: Connecting to ec2-184-73-218-40.compute-1.amazonaws.com [184.73.218.40] port 22.
debug1: Connection established.
debug1: identity file /Users/tigger/.ec2/domainpolish type 1
debug1: identity file /Users/tigger/.ec2/domainpolish-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3p1 Debian-3ubuntu7
debug1: match: OpenSSH_5.3p1 Debian-3ubuntu7 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.6
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: Host 'ec2-184-73-218-40.compute-1.amazonaws.com' is known and matches the RSA host key.
debug1: Found key in /Users/tigger/.ssh/known_hosts:11
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/tigger/.ec2/domainpolish
debug1: Authentications that can continue: publickey
debug1: Offering RSA public key: domainpolish
debug1: Authentications that can continue: publickey
debug1: No more authentication methods to try.
Permission denied (publickey).
我也尝试过重启实例。有人有其他方法可以让我试试吗？非常感谢！
答案1
我在该日志中看到的唯一内容是不允许漫游，您的密钥是类型 1 还是类型 2？
还要检查 /Users/tigger/.ssh 目录的权限，该目录应由用户拥有并被 chmod 700。authorized_keys 文件也应被 chmod 700 并由用户拥有。
答案2
您是否尝试使用正确的用户登录？例如，Ubuntu 镜像使用 ubuntu 用户而不是 root 用户。