mysql client 连接 报错：
your password has expired. to log in you must change it using a client that supports expired password ...
发现是因为mysql 密码默认是90天过期。 所以需要重设密码,
1) mysql -uroot -ppassword
2) set password = password('newpassword')
3) ALTER USER 'root'@'localhost' PASSWORD EXPIRE NEVER; -- 设置密码有效期为永久