MySQL + enforces complex password configuration

This function is a plug-in introduced in mysql versions later than mysql 5.5. This function is not enabled by default for both source code installation and binary installation, if you do not enable this function to set a simple password for mysql, you will be prompted but will still be allowed to pass.
 
1. Enable the force-set complex password function

Add the following content to the my. cnf file:
 
Plugin-load = validate_password.so
Validate-password = FORCE_PLUS_PERMANENT

2. Query and forcibly set complex password-related settings

Show variables like 'validate % ';

The result is similar to the figure below.