sudo /etc/init.d/mysql stop
sudo mkdir /var/run/mysqld/
sudo chown mysql /var/run/mysqld/
sudo mysqld_safe --skip-grant-tables &
mysql -u root
use mysql;
update user set authentication_string = PASSWORD(""), plugin = "mysql_native_password" where User='root';
flush privileges;
quit;
sudo /etc/init.d/mysql stop
sudo /etc/init.d/mysql start