title: brew services start postgresql not working
body: <p>I have installed postgres in Mac using command</p>
  
  <p><code>brew install postgresql@9.6</code> 
  and is successfully installed </p>
  
  <p><code>brew services start postgresql@9.6</code> is successful also<br>
  <code>==&gt; Successfully started postgresql@9.6 (label: homebrew.mxcl.postgresql@9.6)
  </code></p>
  
  <p>But when I tried to access Postgres from my Mac terminal <code>psql postgresql@9.6</code> it prompt me weird error</p>
  
  <pre><code>-bash: /usr/local/bin/psql: No such file or directory
  </code></pre>
  
  <p>Am I doing something wrong, how to open psql from my terminal 
  Why there is no psql file  in my <code>/usr/local/bin</code></p>