Linux下MySQL資料庫報：Access denied for user 'root'@'localhost' (using password: NO)的錯誤怎麼解決？

Linux下MySQL報：Access denied for user 'root'@'localhost' (using password: NO)的錯誤怎麼解決？

service mysqld 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

service mysqld start
mysql -uroot -p