title: postgresql: how to delete database cluster
body: <p>I have used the command initdb to create a database cluster:</p>
  
  <pre><code>sudo su postgres -c '/opt/local/lib/postgresql83/bin/initdb -D /opt/local/var/db/postgresql83/defaultdb'
  </code></pre>
  
  <p>If I want to delete this database cluster, can I simply remove the folder defaultdb? Or is there some command I should use?</p>