title: name 'get_config' is not defined
body: <p>when i am working with ipython notebook, i want to run a notebook server. I followed the official <a href="http://ipython.org/ipython-doc/1/interactive/public_server.html" rel="noreferrer">tutorial</a>  However, when I want to obtain the <code>get_config()</code> function as said in the tutorial, I come across with the name <code>get_config</code> is not defined problem.
  I searched the internet and found the <a href="http://python.6.x6.nabble.com/get-config-td5058343.html" rel="noreferrer">page</a> . However, there is no <code>~/.ipython/profile_default/ipython_config.py</code>  file in my ubuntu 12.04 system. What can I do to solve the problem?</p>