CentOS6.5 登录mysql 运行SQL语句总是报错解决

会报：

centos6.5 Access denied for user 'root'@'localhost' (using password: NO)

mysqladmin: unable to change password; error: 'Your password does not satisfy the current policy req

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

Warning: Since password will be sent to server in plain text, use ssl connection to ensure password 

ERROR 1819 (HY000): Your password does not satisfy the current policy requirements  等，mysql5.7安装时会产生随机密码；

解决方法：

进入mysql

set global validate_password_policy=0; //解决密码复杂度验证

SET PASSWORD = PASSWORD('your new password');//设置新密码

flush privileges;