anchor.diff:    && tar xfz spark-1.4.1-bin-hadoop2.6.tgz \
     && ln -s spark-1.4.1-bin-hadoop2.6 spark
   
  -# ipython & notebook
  -RUN apt-get install -y ipython ipython-notebook
  -
  +# ipython & notebook & libraries
  +RUN apt-get install -y ipython ipython-notebook \
  +  && apt-get install -y python-scipy python-pandas python-sympy
   
   WORKDIR /opt
   COPY assets/cc-init.sh /opt/cc-init.sh
  
positive.code: #EXPOSE 22 80
  
  CMD /opt/cc-init.sh; /usr/bin/supervisord -c /etc/supervisor/supervisord.conf
  
negative.code: # ClassCat/Spark Dockerfile
  #   Maintained by ClassCat Co.,Ltd ( http://www.classcat.com/ )
  ########################################################################
  
  #--- HISTORY -----------------------------------------------------------
  # 04-sep-15 : fixed.
  #
  #--- TODO --------------------------------------------------------------
  # 04-sep-15 : should be run as non-root.
  #
  #--- DESCRIPTION -------------------------------------------------------
  # 04-sep-15 : python-numpy, python-matplotlib, python-nose : o.k.
  #
  #-----------------------------------------------------------------------
  
  ENV DEBIAN_FRONTEND noninteractive
  
  