[GENERAL] .dmp files in postgresql

[Alpha Beta]

Hi list,

I have got two files (template1.dmp, example1.dmp) and I want to open them
in postgresql, I tried the following commands:

- Import *template1 *:
    * createdb -U postgres template1
    * psql -U postgres template1 < template1.dmp

- Create the sample of the database:
    * createdb -U postgres example1
    * psql -U postgres example1 < example1.dmp

I've got no error reported by postgres but nothing happened either.
How should I proceed exactly? Sorry I'm a newbie with PostgreSQL :)

Regards!