title: python 2.7: why I can't open Tensorboard?
body: <p>I have installed tensorflow (Tensorflow 1.1.0)with pip on vagrant ubuntu 14.04. And I have a test file which code are as following:</p>
  
  <pre><code>import tensorflow as tf
  
  a = tf.add(1, 2,)
  b = tf.multiply(a, 3)
  c = tf.add(4, 5,)
  d = tf.multiply(c, 6,)
  e = tf.multiply(4, 5,)
  f = tf.div(c, 6,)
  g = tf.add(b, d)
  h = tf.multiply(g, f)
  with tf.Session() as sess:
      writer = tf.summary.FileWriter("test_b/", sess.graph)
      print(sess.run(h))
      writer.close()
  </code></pre>
  
  <p>And I run the </p>
  
  <pre><code>vagrant@vagrant-ubuntu-trusty-64:~$ tensorboard --logdir=test_b/
  Starting TensorBoard 41 on port 6006
  (You can navigate to http://10.0.2.15:6006)
  </code></pre>
  
  <p>But when opened the <a href="http://10.0.2.15:6006" rel="nofollow noreferrer">http://10.0.2.15:6006</a> in the brower, there is no response and said can't be accessed.</p>
  
  <p>Thanks!</p>