спираме mysql сървиса, след това

mysqld_safe –skip-grant-tables &

mysql –user=root mysql

mysql> update user set Password=PASSWORD(‘newpassword’) where user=’root’;

Query OK, 0 rows affected (0.00 sec)Rows matched: 0 Changed: 0 Warnings: 0

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> exit;
Bye