$

$ sudo mkdir /var/run/mysqld; sudo chown mysql /var/run/mysqld
$ sudo mysqld_safe --skip-grant-tables&

$ sudo mysql --user=root mysql

mysql> update user set Password=PASSWORD('new-password') where user='root';
flush privileges;

mysql> update user set authentication_string=PASSWORD('new-password') where user='root';
flush privileges;

$ sudo service mysql stop

$ sudo service mysql start

$ sudo mysqladmin shutdown

sudo mysql_secure_installation

Set root password? [Y/n] y   (press 'y' to set new password)
New password:
Re-enter new password:

$ sudo mysql --user=root mysql