AWS 连接错误：权限被拒绝（公钥）

Question

对不起，如果这对你来说听起来多余，但相信我不是。我已经尝试了几乎大多数与此问题相关的链接，但到目前为止没有任何效果。我什至尝试了这篇文章二。以下是我迄今为止尝试过的

1. 密钥的许可 400 以及 600
2. ubuntu 作为用户名，因为它是 Ubuntu 14.04
3. IP是正确的，我什至也尝试过公共DNS
4. 密钥附加到实例
5. 使用 FireFox 浏览器的 AWS Java 客户端 (MindTerm)。但是当我按回车键时，它会在我的 IP 上显示这一行时出现错误。即使我很幸运，它也会询问我给 ubuntu 的用户名，然后它退出并给出错误“I/O 错误 - 读取失败：未知错误”，或者只是带我回到 IP 步骤。

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MindTerm home: /home/waqas/.mindterm/
SSH Server/Alias: 54.191.37.141
Connected to server running SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2

Server's hostkey (ssh-rsa) fingerprint:
openssh md5:  95:44:f1:40:07:90:00:2a:7d:9a:1f:49:a1:71:8a:0b
bubblebabble: xilon-segen-tufep-manir-rekad-lucag-fetoz-sover-hyhuh-kafiz-kixox

在此问题之前我做的最后一件事是 2 天前我试图使用此链接在我的客户端上安装 FTP 服务器http://www.krizna.com/ubuntu/setup-ftp-server-on-ubuntu-14 -04-vsftpd/ . 不幸的是，这个链接没有按预期工作，我最终没有成功登录 FTP。今天，当我尝试使用我的密钥对登录时，它给了我错误。

以下是我的 ssh 尝试日志

waqas@waqas-itu:~/Downloads/key$ ssh -v -i test.pem ubuntu@54.191.37.141
OpenSSH_6.0p1 Debian-3ubuntu1.2, OpenSSL 1.0.1c 10 May 2012
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to 54.191.37.141 [54.191.37.141] port 22.
debug1: Connection established.
debug1: identity file test.pem type -1
debug1: identity file test.pem-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1p1 Ubuntu-2ubuntu2
debug1: match: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.0p1 Debian-3ubuntu1.2
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: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA 80:dd:8f:50:a3:80:81:00:39:06:e4:05:6e:f3:1f:16
debug1: Host '54.191.37.141' is known and matches the ECDSA host key.
debug1: Found key in /home/waqas/.ssh/known_hosts:108
debug1: ssh_ecdsa_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: testserverpem.pem
debug1: Authentications that can continue: publickey
debug1: Offering RSA public key: waqas.jamal@***.com
debug1: Authentications that can continue: publickey
debug1: Trying private key: test.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).

Answer 1

尝试从known_hosts 文件中删除密钥，然后重新尝试连接。

这至少应该消除任何“旧”缓存连接