backup and restore PostgreSQL database

I am sure there are a lot of ways how to do this but I would like to show you this effective way

1. whether you want to backup a database the sintaxis is:

pg_dump -h -U -f

Example:
pg_dump -h localhost -U bob accounting -f accounting07042015.sql

2. whether you want to restore a database you may use this sintaxis:
 psql -H -U -d -f

Example:
psql -h localhost -U bob -d accounting -f accounting07042015.sql

pay attention whether you get some warning or error messages.

Cheers