解决 ERROR 1819 (HY000): Your password does not satisfy the current policy requirements

This is when mysql is initialized, a temporary password is used, and when the custom password is modified, because the custom password is relatively simple, there is a problem that does not comply with the password policy.

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

Solution:

① View the initial password policy of mysql:

mysql> SHOW VARIABLES LIKE 'validate_password%';
| Variable_name                        | Value  |
+--------------------------------------+--------+
| validate_password_check_user_name    | OFF    |
| validate_password_dictionary_file    |        |
| validate_password_length             | 8      |
| validate_password_mixed_case_count   | 1      |
| validate_password_number_count       | 1      |
| validate_password_policy             | MEDIUM |
| validate_password_special_char_count | 1      |
+--------------------------------------+--------+

② First, you need to set the verification strength level of the password, and set the global parameter of validate_password_policy to LOW:

mysql> set global validate_password_policy=LOW;
Query OK, 0 rows affected (0.00 sec)

③ The current password length is 8 and can be set to a 4-digit password:

mysql> set global validate_password_length=4;
Query OK, 0 rows affected (0.00 sec)

④ Now you can set a simple password for mysql:

mysql> update  user set authentication_string=password('123456') where user='root';
Query OK, 2 rows affected, 1 warning (0.00 sec)
Rows matched: 2  Changed: 2  Warnings: 1
mysql> quit
Bye

⑤ Restart the mysql service:

[root@nginx-dev apps]# service mysqld restart