title: Trying to get Postgres setup in my environment but can't seem to get permissions to intidb
body: <p>I'm following the recent RailsCast on setting up PostgreSQL, but I'm unable to run the <code>initdb /usr/local/var/postgres</code> command. Each time I run it, I get this error:</p>
  
  <pre><code>The files belonging to this database system will be owned by user "Construct".
  This user must also own the server process.
  
  The database cluster will be initialized with locale en_US.UTF-8.
  The default database encoding has accordingly been set to UTF8.
  The default text search configuration will be set to "english".
  
  creating directory /usr/local/var/postgres ... initdb: could not create directory "/usr/local/var": Permission denied
  </code></pre>