重装系统后ssh登陆遇到的问题

最新推荐文章于 2025-10-23 18:03:45 发布

转载最新推荐文章于 2025-10-23 18:03:45 发布 · 1.9k 阅读

本文详细解析了SSH连接中公钥验证的过程及known_hosts文件的作用，当遇到公钥变化导致的连接失败时，提供了具体的解决方案。通过实例演示如何处理公钥变更，确保远程服务器的安全稳定连接。

用SSH的跳转登录服务器后，ssh会把你每个你访问过计算机的公钥(public key)都记录在~/.ssh/known_hosts (mac系统).

当下次访问相同计算机时,SSH会核对公钥.如果公钥不同,OpenSSH会发出警告，如果我们重新安装系统，其公钥信息还在，连接会出现问题.如果报错,就需要把known_hosts文件中对应的公钥删除 .

The authenticity of host '172.16.107.9 (172.16.107.9)' can't be established.
ECDSA key fingerprint is SHA256:wv1CCBadfRIKUcK9Jdm/6tRyM7v1Zpu9ebRDc8y66jg.
Are you sure you want to continue connecting (yes/no)?

输入yes

The authenticity of host '172.16.107.9 (172.16.107.9)' can't be established.
ECDSA key fingerprint is SHA256:wv1CCBadfRIKUcK9Jdm/6tRyM7v1Zpu9ebRDc8y66jg.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '172.16.107.9' (ECDSA) to the list of known hosts.
Connection closed by 172.16.107.9 port 22

再次连接