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缘由：
简单记录一下前段时间出现的ssh登录异常问题的处理办法，方便以后参考。
正文：
参考解答：
现象：ssh突然登录不上云机器了
$ ssh [email protected]
[email protected]: Permission denied (publickey,keyboard-interactive).
$ ssh -vv [email protected]排查过程：
- 通过web控制台登录其它账号进行查看
systemctl status sshd
sshd -t- 发现错误提示：
error: Could not load host key: /etc/ssh/ssh_host_dsa_key
找到相关文章说明：
$ ls -al /etc/ssh/ssh*key
$ sudo rm -r /etc/ssh/ssh*key
$ sudo systemctl restart sshd
# 或
$ sudo ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key
$ sudo ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key
$ sudo ssh-keygen -t ecdsa -f /etc/ssh/ssh_host_ecdsa_key
$ ls -al /etc/ssh/ssh*key - 然后再尝试登录，依旧报错，不过换了一个错误提示：
sshd user xxx not allowed because account is locked - 又找到相关说明，进行尝试
# 更新 sshd 的配置文件
# vim /etc/ssh/sshd_config
+ UsePAM yes
# PasswordAuthentication yes 安装时一般也默认有这个配置，如果没了也需要加上
# systemctl restart sshd
# systemctl status sshd
或
# 直接修改 /etc/shadow 文件（这个办法暂未实际测试）
# sed -i s/my-username:!/"my-username:*"/g /etc/shadow问题解决。
参考链接：
Linux有问必答：如何修复“sshd error: could not load host key”
https://linux.cn/article-4226-1.html
How to fix “sshd error: could not load host key”
https://www.xmodulo.com/sshd-error-could-not-load-host-key.html
User username not allowed because account is locked #35
https://github.com/camptocamp/puppet-accounts/issues/35
ssh免密失败，报错user not allowed because account is locked
https://www.cnblogs.com/mingfan/p/13818902.html
ssh报user not allowed because account is locked错误
https://blog.csdn.net/weixin_41875646/article/details/84777346
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