Option 1
su - postgres
psql template1
CREATE USER tom WITH PASSWORD 'myPassword';
CREATE DATABASE jerry;
GRANT ALL PRIVILEGES ON DATABASE jerry to tom;

Option 2:
su postgres
postgres@debian: createuser tom
postgres@debian: createdb jerry
psql template1
\password tom
GRANT ALL PRIVILEGES ON DATABASE jerry to tom;


import

postgres@mimaquina $ psql jerry < dumpfile