MySQL forgot password solution:

Linux system:

# /etc/init.d/mysql stop 

#mysqld_safe --user=mysql --skip-grant-tables --skip-networking & 
#mysql -u root mysql 
mysql>  UPDATE user SET Password=PASSWORD('newpassword') where USER='root'; 
mysql> FLUSH PRIVILEGES; 
mysql> quit;

Windows system :

1. Log in to the system with the system administrator.

2. Stop the MySQL service.

3. Enter the command window, and then enter the MySQL installation directory, such as my installation directory is c:\mysql, enter C:\mysql\bin

4. Start MySQL without permission check

c:\mysql\bin>mysqld-nt ––skip-grant-tables 或：c:\mysql\bin>mysqld ––skip-grant-tables

执行:mysql -u root mysql 
mysql> UPDATE user SET Password=PASSWORD('newpassword') where USER='root'; 
mysql> FLUSH PRIVILEGES; 
mysql> quit ;