MySQL - ERROR 2002 (HY000): Can't connect to local MySQL server through socket | BackTrack 5

mysql -u root -p
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ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)

mkdir /var/run/mysqld
touch /var/run/mysqld/mysqld.sock

chown -R mysql /var/run/mysqld

/etc/init.d/mysql restart