Postgresql import user from linux I install postgresql 9.2 on a Ubuntu 12.10 machine

I tried to import linux's user to postgresql 

but only way I can figure out is 

CREATE USER Jack WITH PASSWORD '1234';


and do it 10 times (if there are 10 users)!!

Is there any faster way to do it?
Why don't you try doing it from webmin. If you install the PostgreSQL module, under the postgres users section there is an option Add a new PostgreSQL user when a Unix user is added.