问题: $ ssh root@40.125.21.75 root@40.125.21.75's password: Permission denied, please try again. 解决方式,编辑40.125.21.75服务器中的vim /etc/ssh/sshd_config配置文件: PermitRootLogin without-password --改为 PermitRootLogin yes 然后重启 SSH: $ sudo service ssh restart 参考资料:…