How do I uninstall Postgres?

Question

How can I completely uninstall postgres and reinstall it. I have tried:

sudo apt-get --purge remove postgresql postgresql-doc postgresql-common

But I got:

Package postgresql is not installed, so not removed
Package postgresql-doc is not installed, so not removed
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 postgresql-client-8.4 : Depends: postgresql-client-common (>= 104~) but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

Answer 1

I didn't need to reinstall, I just simply needed to apt-get -f install to install the client-common tools.