You must reset your password using ALTER USER statement before executing this statement.

centos7.0安装完mysql5.7.11之后使用mysql -u root -p 连接数据库。操作提示：You must reset your password using ALTER USER statement before executing this statement.
按照提示ALTER USER 修改密码无效，后来发现执行如下命令即可：
SET PASSWORD = PASSWORD(‘123456’);