ERROR 1045 (28000): Access denied for user 'root'@'localhost'

Mysql ERROR 1045 (28000): Access denied for user 'root'@'localhost'
               
               
                Ubuntu8.04刚装了mysql
sudo apt-get install mysql
安装成功了，安装最后要求输入了密码，也输入了，OK
mysql -uroot -p
输入设置的密码
竟然报错了！
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YSE)
初始密码是空的，可我设置了密码的阿。
密码留空
还是错误！
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
于是重改密码！
# /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/mysqld restart
# mysql -u root -p
Enter password:
mysql>
搞定！

http://linux.chinaunix.net/techdoc/database/2008/11/25/1047550.shtml