Running DBT2 on postgresql

Please help me in running DBT2 on postgresql. I am doing it for the first time. I am facing error while running dbt2 test.

I installed dbt2 by following "install" file. Below some final lines of terminal.

Install the project...

-- Install configuration: ""

-- Installing: /home/abhi/dbt2_install/bin/dbt2-client

-- Installing: /home/abhi/dbt2_install/bin/dbt2-datagen

-- Installing: /home/abhi/dbt2_install/bin/dbt2-driver

-- Installing: /home/abhi/dbt2_install/bin/dbt2-transaction-test

-- Installing: /home/abhi/dbt2_install/bin/dbt2-generate-report

-- Installing: /home/abhi/dbt2_install/bin/dbt2-get-os-info

-- Installing: /home/abhi/dbt2_install/bin/dbt2-post-process

-- Installing: /home/abhi/dbt2_install/bin/dbt2-run-workload

-- Installing: /home/abhi/dbt2_install/bin/dbt2-sysstats

-- Installing: /home/abhi/dbt2_install/bin/dbt2-plot-transaction-rate

-- Installing: /home/abhi/dbt2_install/bin/dbt2-pgsql-build-db

-- Installing: /home/abhi/dbt2_install/bin/dbt2-pgsql-check-db

-- Installing: /home/abhi/dbt2_install/bin/dbt2-pgsql-create-db

-- Installing: /home/abhi/dbt2_install/bin/dbt2-pgsql-create-indexes

-- Installing: /home/abhi/dbt2_install/bin/dbt2-pgsql-create-tables

-- Installing: /home/abhi/dbt2_install/bin/dbt2-pgsql-db-stat

-- Installing: /home/abhi/dbt2_install/bin/dbt2-pgsql-drop-db

-- Installing: /home/abhi/dbt2_install/bin/dbt2-pgsql-drop-tables

-- Installing: /home/abhi/dbt2_install/bin/dbt2-pgsql-load-db

-- Installing: /home/abhi/dbt2_install/bin/dbt2-pgsql-load-stored-procs

-- Installing: /home/abhi/dbt2_install/bin/dbt2-pgsql-plans

-- Installing: /home/abhi/dbt2_install/bin/dbt2-pgsql-start-db

-- Installing: /home/abhi/dbt2_install/bin/dbt2-pgsql-stop-db

After that I am following readme_postgresql file. But, I can't understand

"A really quick howto.

Set environment variables, see examples/dbt2_profile." 

Regards,