>Is it posible to schedule / automate a backup task and functions to execute
>at a pre-defined time at a pre-defined recurrence rate?
yes, using the cron daemon and the commands pg_dump or pg_dumpall.
The following entry in the postgres user crontab will backup the
database every day at 03:01 AM in /dev/null (very usefull)
1 3 * * * /usr/local/pgsql/bin/pg_dumpall > /dev/null
just look at
man cron
man crontab
man pg_dumpall
MD.