mysql5.7解决密码太简单不能设置问题

安装地址参考：
https://blog.csdn.net/z13615480737/article/details/78906598

使用默认密码登录mysql

grep “password” /var/log/mysqld.log
2018-06-15T07:12:17.112615Z 1 [Note] A temporary password is generated for root@localhost: *m#e/-Bfz5T+

修改mysql参数配置

mysql> set global validate_password_policy=0;
set global validate_password_mixed_case_count=0;
set global validate_password_number_count=3;
set global validate_password_special_char_count=0;
set global validate_password_length=3;
ps:下面的这两行命令最好手敲，复制可能不好使。
SHOW VARIABLES LIKE ‘validate_password%’;
SET PASSWORD FOR ‘root’@’localhost’ = PASSWORD(‘123’);
msyql5.7以上的版本使用：
update mysql.user set authentication_string=password(‘123456’) where user=’root’ ;