mysql ERROR 1045 (28000)

ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
# /etc/init.d/mysql stop
# /usr/bin/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
# /etc/init.d/mysqld restart
搞定！！