ไม่ได้ใช้ซะนาน ลืม Password จนได้ แต่ถึงลืมก็สามารถแก้ไขจนได้ ;P

debian:/#killall mysqld
debian:/#/usr/libexec/mysqld -Sg --user=root &
debian:/#mysql
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 1 to server version: 3.23.41

Type 'help;' or 'h' for help. Type 'c' to clear the buffer.

mysql> USE mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> UPDATE user
    -> SET password=password("newpassword")
    -> WHERE user="root";
Query OK, 2 rows affected (0.04 sec)
Rows matched: 2  Changed: 2  Warnings: 0

mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)

mysql> exit;
debian:/#killall mysqld

/etc/init.d/mysqld start