Can’t connect to local MySQL

I got the following error
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (111)

Tried several ways and finally solved it through the following way

sudo gksu gedit /etc/mysql/my.cnf

modified

#bind-address       = 127.0.0.1

to

bind-address        = localhost

and restarted

sudo /etc/init.d/mysql restart

it worked