/usr/share/pyshared/IPython/frontend/html/notebook/static/jquery/js/jquery-1.6.2.min.js is in ipython-notebook 0.12.1+dfsg-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/pyshared/IPython/frontend/html/notebook/static/jquery/js/../../../../../../../../javascript/jquery/jquery.js