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shell> mysql -u root mysql
mysql> Update user SET Password=PASSWORD('new_password')
           Where user='root';
mysql> FLUSH PRIVILEGES;
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shell> mysql -u root mysql
mysql> SET PASSWORD FOR root=PASSWORD('new_password');
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shell> mysqladmin -u root password new_password 
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mysql-nt –install
net start  mysql
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net stop "MySQL"
mysqld-nt.exe –remove "MySQL"
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  service mysqld start --skip-networking --skip-grant-tables
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