“警告：'github.com' 的 ECDSA 主机密钥与 IP 地址的密钥不同”问题

Question

我不知道发生了什么，但有一天，当我起床时，git push我的改变发生了：

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Warning: the ECDSA host key for 'github.com' differs from the key for the IP address '140.82.112.4'\nOffending key for IP in /Users/joyliu/.ssh/known_hosts:13\nMatching host key in /Users/joyliu/.ssh/known_hosts:16\n

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我似乎无法连接到 Github。我用 Google 搜索了修复并sed -i '13d' ~/.ssh/known_hosts删除了第 13 行，但随后它显示了相同的错误，但行号不同。

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我这样做的时候也发生过这种情况git pull。

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谁能帮我？先感谢您！

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========更新========

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ssh-keygen -R github.com在和之后ssh-keyscan github.com >> ~/.ssh/known_hosts，它仍然无法正常工作......它给出了：

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(base) \xe2\x9e\x9c  liuzz10.github.io git:(master) ssh-keygen -R github.com\n# Host github.com found: line 17\n# Host github.com found: line 18\n# Host github.com found: line 19\n# Host github.com found: line 20\n/Users/joyliu/.ssh/known_hosts updated.\nOriginal contents retained as /Users/joyliu/.ssh/known_hosts.old\n(base) \xe2\x9e\x9c  liuzz10.github.io git:(master) ssh-keyscan github.com >> ~/.ssh/known_hosts\n# github.com:22 SSH-2.0-babeld-4b034cc8\n# github.com:22 SSH-2.0-babeld-4b034cc8\n# github.com:22 SSH-2.0-babeld-4b034cc8\n(base) \xe2\x9e\x9c  liuzz10.github.io git:(master) git pull\nWarning: the ECDSA host key for 'github.com' differs from the key for the IP address '140.82.112.4'\nOffending key for IP in /Users/joyliu/.ssh/known_hosts:13\nMatching host key in /Users/joyliu/.ssh/known_hosts:18\nAre you sure you want to continue connecting (yes/no)? yes\nfatal: refusing to merge unrelated histories\n(base) \xe2\x9e\x9c  liuzz10.github.io git:(master) git push\nWarning: the ECDSA host key for 'github.com' differs from the key for the IP address '140.82.112.4'\nOffending key for IP in /Users/joyliu/.ssh/known_hosts:13\nMatching host key in /Users/joyliu/.ssh/known_hosts:18\nAre you sure you want to continue connecting (yes/no)? yes\nTo github.com:liuzz10/liuzz10.github.io.git\n ! [rejected]        master -> master (non-fast-forward)\nerror: failed to push some refs to 'github.com:liuzz10/liuzz10.github.io.git'\nhint: Updates were rejected because the tip of your current branch is behind\nhint: its remote counterpart. Integrate the remote changes (e.g.\nhint: 'git pull ...') before pushing again.\nhint: See the 'Note about fast-forwards' in 'git push --help' for details.\n

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Answer 1

如果您收到以下错误：

Warning: the ECDSA host key for 'github.com' differs from the key for the IP address 'IP_ADDRESS'

我建议执行以下操作：

$ ssh-keygen -R github.com

如果这不起作用，则从已知主机中删除 IP 本身：

$ ssh-keygen -R IP_ADDRESS

这应该可以解决你的问题。

Answer 2

[回答有关 SSH 主机密钥的问题。]

您有 2 个不同的主机github.com密钥~/.ssh/known_hosts。该警告是关于第一个警告的。删除两个键：

ssh-keygen -R github.com

并重新添加正确的密钥：

ssh-keyscan github.com >> ~/.ssh/known_hosts

这将添加当前的 RSA 和 ECDSA 密钥。

Answer 3

这是最近在 github 在 2023 年 3 月 24 日大约 05:00 UTC 轮换其RSA SSH 主机密钥后开始的。几乎每个人都开始看到同样的问题。要按照参考帖子的建议删除警告，请运行以下命令

ssh-keygen -R github.com

或者您可以更新~/.ssh/known_hosts文件以手动删除该条目。

要自动将密钥添加到您的已知主机并永久删除 github.com 的警告，请运行以下命令

curl -L https://api.github.com/meta | jq -r '.ssh_keys | .[]' | sed -e 's/^/github.com /' >> ~/.ssh/known_hosts