createuser -s postgres
sudo -u postgres psql postgres

postgres=#

CREATE USER imaprb;
ALTER USER imaprb SUPERUSER CREATEDB;
\password imaprb

DROP DATABASE IF EXISTS imaprb_debug;
CREATE DATABASE imaprb_debug;

sequel "postgres://postgres@localhost" -c "puts DB.run('DROP DATABASE IF EXISTS imaprb_debug'); puts DB.run('CREATE DATABASE imaprb_debug;')"

rake db:reset ; and rake db:migrate ; and rake db:seed