title: Why am I receiving a low level socket error when using the Fabric python library?
body: <p>When I run the command:</p>
  
  <pre><code>fab -H localhost host_type
  </code></pre>
  
  <p>I receive the following error:</p>
  
  <pre><code>[localhost] Executing task 'host_type'
  [localhost] run: uname -s
  
  Fatal error: Low level socket error connecting to host localhost: Connection refused
  
  Aborting.
  </code></pre>
  
  <p>Any thoughts as to why? Thanks.</p>
  
  <h3>Fabfile.py</h3>
  
  <pre><code>from fabric.api import run
  def host_type():
      run('uname -s')
  </code></pre>
  
  <h3>Configuration</h3>
  
  <ul>
  <li>Fabric 1.0a0 (installed from the <a href="http://github.com/cumulusware/fabric/commit/b8e1b6ac3f43787375bb77c1a64d7f9c000e7511" rel="noreferrer">most recent Github commit---b8e1b6a</a>)</li>
  <li>Paramiko 1.7.4</li>
  <li>PyCrypto 2.0.1</li>
  <li>Virtualenv ver 1.3.3</li>
  <li>Python 2.6.2+ (release26-maint:74924, Sep 18 2009, 16:03:18)</li>
  <li>Mac OS X 10.6.1</li>
  </ul>