1. Error prompt
2. Modify the MySql configuration file my.cnf and add skip-grant-tables
Search for mysqld to 
add skip-grant-tables, so that mysql can log in without password.
3. Restart the service
View all services 
Restart the mysqld service
4. Connect to MySql again and reset the password
Any password can be entered 
Switch to mysql database 
Reset password
UPDATE user SET password=PASSWORD("root") WHERE user='root';
- 1
5. Modify the configuration file my.cnf, delete skip-grant-tables, restart, and log in again
Delete skip-grant-tables and 
restart the service
Log in again
complete!