sudo apt-get --purge remove postgresql sudo apt-get purge postgresql* sudo apt-get --purge remove postgresql postgresql-doc postgresql-common
sudo aptitude purge postgresql postgresql-common sudo dpkg -P postgresql-8.4 sudo find / -name postgresql -exec rm -Rf {} \; sudo find / -name pgsql -exec rm -Rf {} \; sudo find / -name psql -exec rm -Rf {} \; sudo userdel postgres