BACKUP_PATH="/backup"
DBNAME="barcamp_dev"
NOW=`date '+%y_%b_%d_%T'`
vacuumdb -w -z -U postgres $DBNAME
pg_dump $DBNAME -w -U postgres | gzip > $BACKUP_PATH/"postgresql-$DBNAME-$NOW.gz"
sudo su to root
su to postgres
with postgres user, do crontab -e
add the back shell script in the file as below
# m h dom mon dow command
14 9 * * * /home/juacompe/projects/barcamp/psql.backup.sh
14 9 * * * touch /backup/testcron