# mysql -uroot -p Enter password: ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO) # /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 # /etc/init.d/mysql restart # mysql -uroot -p Enter password: <输入新设的密码newpassword>