FILE=`date +"%Y%m%d"`_backup.sql
DBSERVER=127.0.0.1
DATABASE=
USER=postgres
PASS=

# (2) in case you run this twice in one day, remove the previous version of the file
unalias rm     2> /dev/null
rm ${FILE}     2> /dev/null
rm ${FILE}.gz  2> /dev/null

# (3) do the mysql database backup (dump)

# use this command for a database server on a separate host:
#mysqldump --opt --protocol=TCP --user=${USER} --password=${PASS} --host=${DBSERVER} ${DATABASE} > ${FILE}

# use this command for a database server on localhost. add other options if need be.
pg_dump ${DATABASE} > ${FILE}

# (4) gzip the mysql database dump file
gzip $FILE

# (5) show the user the result
echo "${FILE}.gz was created:"
ls -l ${FILE}.gz