用用户名＋密码的方式登录出现以下问题：
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The authenticity of host 'xxx.xxx.xxx.xxx can't be established. |
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RSA key fingerprint is f4:d0:1a:9c:09:65:78:71:25:33:79:c2:d5:aa:0b:c1. |
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Are you sure you want to continue connecting (yes/no)? no |
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Host key verification failed. |
如果是直接输入yes
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The authenticity of host 'xxx.xxx.xxx.xxx' can't be established. |
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RSA key fingerprint is f4:d0:1a:9c:09:65:78:71:25:33:79:c2:d5:aa:0b:c1. |
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Are you sure you want to continue connecting (yes/no)? yes |
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Warning: Permanently added 'xxx.xxx.xxx.xxx' (RSA) to the list of known hosts. |
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Permission denied (publickey,gssapi-with-mic,password). |
一、可以把~/.ssh/known_hosts清除
二、如果还是不行
修改/etc/ssh/sshd-config文件，将其中的PermitRootLogin no修改为yes，PubkeyAuthentication yes修改为no，AuthorizedKeysFile .ssh/authorized_keys前面加上#屏蔽掉，PasswordAuthentication no修改为yes就可以了。
三、如果还是有问题，那颗一用下面的方式解决：
用命令 ssh -l username hostname
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Are you sure you want to continue connecting (yes/no)? |
1、这个是ssh安全认证是的一个RSA认证。此处必须选择yes才能连接。
第一次yes后，他会询问你是否永久把这个RSA认证加入本地，选择yes后，以后不会再出现提醒。
每次登陆只需要输入密码即可。
2、也可以不用输入1中的yes，但是需要修改本机配置。
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# StrictHostKeyChecking ask 改成 |
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StrictHostKeyChecking no |