title: Trying to follow a shell scripting tutorial, receiving "$: command not found"
body: <p>I'm following this guide here:
  <a href="http://www.cyberciti.biz/tips/find-out-if-file-exists-with-conditional-expressions.html" rel="nofollow">http://www.cyberciti.biz/tips/find-out-if-file-exists-with-conditional-expressions.html</a></p>
  
  <p>Every time I run: <code>$ [ -f /etc/passwd ] &amp;&amp; echo "File exists" || echo "File does not exists"</code></p>
  
  <p>I get:</p>
  
  <pre><code>$: command not found
  File does not exists
  </code></pre>
  
  <p>Any advice?</p>