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title: "macOS 终端远程连接密钥验证失败 - 一纸忘忧"
description: "以前在 Windows 下远程连接 Linux 服务器一般用的是 PuTTY，现在换到 macOS 了，发现 macOS 系统自带的终端也是具有远程连接功能的，不需要下载其他的 SSH 客户端。"
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last_updated: "2026-09-16T09:59:27.259Z"
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# **macOS 终端远程连接密钥验证失败**

2019.07.20 6,394  0

以前在 Windows 下远程连接 Linux 服务器一般用的是 PuTTY，现在换到 macOS 了，发现 macOS 系统自带的终端也是具有远程连接功能的，不需要下载其他的 SSH 客户端。

然后我在一台洛杉矶的 VPS 上面装酸酸乳时，出了点问题然后重置系统，第二次连接 SSH 发现了报错：

 Plain Text

```
$ ssh root@107.174.218.121@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!Someone could be eavesdropping on you right now (man-in-the-middle attack)!It is also possible that a host key has just been changed.The fingerprint for the ECDSA key sent by the remote host isSHA256:HDjXJvu0VYXWF+SKMZjSGn4FQmg/+w6eV9ljJvIXpx0.Please contact your system administrator.Add correct host key in /Users/ikxin/.ssh/known_hosts to get rid of this message.Offending ECDSA key in /Users/ikxin/.ssh/known_hosts:46ECDSA host key for 107.174.218.120 has changed and you have requested strict checking.Host key verification failed.
```

大致意思就是主机密钥校验失败，和第一次保存的密钥不一致。这个问题在使用 PuTTY 时并没有遇到过，可能是两者的机制不一样。出现这个问题一般是重置系统导致的，因为重置系统时会重新生成密钥，所以就匹配不上了。

解决问题也很简单，使用的是 `ssh-keygen`。

在终端输入：

 Plain Text

```
ssh-keygen -R 你要访问的 IP 地址
```

这样就可以重置这个 IP 的匹配密钥了，而且还会将旧的密钥保存在 `known_hosts.old` 文件中。

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