解决 Could not load host key: /etc/ssh/ssh_host_rsa_key && 解决Permission denied (publickey)

解决 Could not load host key: /etc/ssh/ssh_host_rsa_key && 解决Permission denied (publickey)

Could not load host key: /etc/ssh/ssh_host_rsa_key
Could not load host key: /etc/ssh/ssh_host_ecdsa_key
Could not load host key: /etc/ssh/ssh_host_ed25519_key

• Restarting OpenBSD Secure Shell server sshd Could not load host key: /etc/ssh/ssh_host_rsa_key
  Could not load host key: /etc/ssh/ssh_host_ecdsa_key
  Could not load host key: /etc/ssh/ssh_host_ed25519_key

sudo ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key

然后三次enter

sudo ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key

然后三次enter

用ecdsa加密方式生成ssh密钥

sudo ssh-keygen -t ecdsa -P '' -f /etc/ssh/ssh_host_ecdsa_key

然后三次enter

sudo ssh-keygen -t ed25519 -P '' -f /etc/ssh/ssh_host_ed25519_key

然后三次enter

解决Permission denied (publickey)

解决问题
允许ssh密码登录权限
登录目标机器，打开/etc/ssh/sshd_config ，修改PasswordAuthentication no为：
PasswordAuthentication yes。

# sudo vim /etc/ssh/sshd_config

PasswordAuthentication yes

然后执行 sudo /etc/init.d/ssh restart