Can't connect to local MySQL server through socket

[al-codaio]

I am also running into a script/setup error which is not related to: #34

The mysql2 gem installs fine and when I run script/setup I run into this error:

Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
Couldn't create database for {"adapter"=>"mysql2", "encoding"=>"utf8", "reconnect"=>false, "database"=>"railscasts_development", "pool"=>5, "username"=>"root", "password"=>nil, "host"=>"localhost"}, charset: , collation:
Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
Couldn't create database for {"adapter"=>"mysql2", "encoding"=>"utf8", "reconnect"=>false, "database"=>"railscasts_test", "pool"=>5, "username"=>"root", "password"=>nil, "host"=>"localhost"}, charset: , collation:
Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
Couldn't create database for {"adapter"=>"mysql2", "encoding"=>"utf8", "reconnect"=>false, "database"=>"railscasts_production", "pool"=>5, "username"=>"root", "password"=>nil, "host"=>"localhost"}, charset: , collation:

I'm using Ubuntu 12.04 and RVM and don't even see a /var/run/mysqld folder. Has anyone else run into this issue?