主机重装后,如何不用手动删除 known_hosts 旧公钥更方便的 ssh 连接主机? - V2EX
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raw0xff
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主机重装后,如何不用手动删除 known_hosts 旧公钥更方便的 ssh 连接主机?

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  •   raw0xff Jul 11, 2023 1721 views
    This topic created in 1022 days ago, the information mentioned may be changed or developed.

    每次重装主机都要在本地 known_hosts 里删除旧的 key 才能 ssh 连接主机。 有没有什么命令或者 ssh 参数或者什么方式可以自动更新旧的 key 直接连接主机?

    8 replies    2023-07-11 15:20:22 +08:00
    0o0O0o0O0o
        1
    0o0O0o0O0o  
       Jul 11, 2023   1
    如果你真的完全不在意这种安全,那就

    StrictHostKeychecking no
    UserKnownHostsFile /dev/null

    警告:非常危险
    raw0xff
        2
    raw0xff  
    OP
       Jul 11, 2023
    @0o0O0o0O0o 我怀疑你是用 chatgpt 给的回答,但是没有证据。
    我问 chatGPT 就是这么回答的哈哈
    Corolin
        3
    Corolin &nbp;
       Jul 11, 2023
    你可以试试第三方的 SSH 连接工具 Termius 我记得是会提示你不一致是否要更新的
    raw0xff
        4
    raw0xff  
    OP
       Jul 11, 2023
    @Corolin 是的 termius 没问题,但是我用的比较频繁想写成脚本用。
    Corolin
        5
    Corolin  
       Jul 11, 2023
    ssh known_hosts update
    Corolin
        6
    Corolin  
       Jul 11, 2023   2
    焯 按错了 刚才那个是在谷歌里搜关键字来着
    下面是指令
    ssh-keygen -f ~/.ssh/known_hosts -R ${ip}
    ssh-keygen -f ~/.ssh/known_hosts -R [${ip}]:${port}
    InDom
        7
    InDom  
       Jul 11, 2023
    @Corolin #6 实测有效,已感谢。
    raw0xff
        8
    raw0xff  
    OP
       Jul 11, 2023
    感谢 @0o0O0o0O0o @Corolin

    实测有效
    ssh-keygen -R 主机 IP // 把默认的 known_hosts 文件保存到 known_hosts.old ,并从 known_hosts 文件中删除与主机相关的 key
    ssh user@IP -o StrictHostKeyChecking=no // 可以免去首次 ssh 登录的 yes
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