You are required to change your password immediately (password aged)
Last login: Thu Aug 22 17:04:01 2019 from 21.8.143.243
WARNING: Your password has expired.
You must change your password now and login again!
Changing password for user appadmin.
Changing password for appadmin.
(current) UNIX password: 输入老密码
New password: 输入新密码
Retype new password:输入新密码
Welcome to Alibaba Cloud Elastic Compute Service !
解决方法是：先输入原始密码，出现 New password :输入新密码，出现 Retype new password: 再次输入确认的新密码
原文：https://www.cnblogs.com/qinxu/p/11431827.html