centos 7 | mysql57 |修改初始密码 | Your password does not satisfy the current policy requirements

• 获取初始密码
  一定要启动服务，不然可能log文件里只有上一次安装mysql的临时密码

systemctl start mysqld

grep 'temporary password' /var/log/mysqld.log

输出

2019-09-26T02:25:44.308864Z 1 [Note] A temporary password is generated for root@localhost: %M6SEFbghsI1
2019-10-06T03:01:09.870139Z 1 [Note] A temporary password is generated for root@localhost: mqs_d>9bwkoA

选择下面这个最新的mqs_d>9bwkoA

• 登陆mysql

mysql -uroot -p

然后输入密码。

• 修改密码

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements

密码不符合规范。
必须修改两个全局参数：
首先，修改validate_password_policy参数的值

mysql> set global validate_password_policy=0; 

再修改密码的长度

set global validate_password_length=1;

再次执行修改密码就可以了

ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';

• 授权其他机器登陆

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;
 
FLUSH  PRIVILEGES;