postgresql with tcp/ip conection

[cenapad <listas@cenapadne.br>]

Does anybody  know how to configure /etc/init.d/postgresql to accept 
TCP/IP conections?
In redhat was simpler (just modify the line was started with "su -l 
postgres"). But in debian, filhe is completely different .
I know that a flag -i should be added, but i dont know where.