在终端里, 输入 ssh root@xxx.xxx.xxx.xxx 其中, xxx.xxx.xxx.xxx是阿里云控制台的公网IP地址
ssh root@xxx.xxx.xxx.xxx
Are you sure you want to continue connecting (yes/no)?
输入yes, 回车
root@xxx.xxx.xxx.xxx's password:
输入密码, 回车, OK