The solution in this question on Stack Overflow, Unable to open an existing notebook in IPython Notebook, advises installing the latest notebook, but I was unable to find how to do so.
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pip install --userinstead, so you don't have to pollute the site's installation. It's just safer. – Emre Mar 17 '14 at 23:57sudo pip install jupyterwas missing. – Martin Thoma Nov 14 '15 at 21:56