anchor.diff:  RUN apt-get install git -y
   
   # rbenv
  -RUN git clone git://github.com/sstephenson/rbenv.git ~/.rbenv
  -RUN git clone https://github.com/sstephenson/ruby-build.git ~/.rbenv/plugins/ruby-build
  +#RUN git clone git://github.com/sstephenson/rbenv.git /root/.rbenv
  +#RUN git clone https://github.com/sstephenson/ruby-build.git /root/.rbenv/plugins/ruby-build
   
   # Ruby 2.1.1
   RUN apt-get install build-essential libssl-dev -y
  -ADD rbenv.sh /opt/rbenv.sh
  -RUN bash /opt/rbenv.sh
  -#RUN ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key
  -#RUN ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key
  +#ADD rbenv.sh /opt/rbenv.sh
  +#RUN sudo -u root bash /opt/rbenv.sh
   
   # mongodb
   #RUN apt-key adv --keyserver keyserver.ubuntu.com --recv 7F0CEB10
  
positive.code: RUN sed -ri 's/#UsePAM no/UsePAM no/g' /etc/ssh/sshd_config
  RUN mkdir /var/run/sshd
  RUN chmod 711 /var/run/sshd
  RUN mkdir /home/fisto/.ssh
  ADD authorized_keys /home/fisto/.ssh
  CMD /usr/sbin/sshd -D
  
  # Nginx
  RUN sed -i -e "1i deb http://nginx.org/packages/mainline/ubuntu/ precise nginx" /etc/apt/sources.list
  RUN sed -i -e "2i deb-src http://nginx.org/packages/mainline/ubuntu/ precise nginx" /etc/apt/sources.list
  
  RUN apt-get install wget -y
  RUN wget http://nginx.org/keys/nginx_signing.key
  RUN apt-key add nginx_signing.key
  
  
negative.code: 
  RUN apt-get update -y
  
  # root
  RUN echo 'root:root' | chpasswd
  
  RUN mkdir /root/.ssh
  RUN chmod 700 /root/.ssh
  ADD authorized_keys /root/.ssh/authorized_keys
  RUN chmod 644 /root/.ssh/authorized_keys
  
  # user add
  #RUN useradd fisto
  #RUN echo 'fisto:fisto' | chpasswd
  #RUN echo 'fisto ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers.d/fisto
  #RUN chmod 440 /etc/sudoers.d/fisto
  
  #RUN mkdir /home/fisto
  #RUN chown fisto:fisto /home/fisto
  
  #RUN mkdir /home/fisto/.ssh
  #RUN chown fisto:fisto /home/fisto/.ssh
  #RUN chmod 700 /home/fisto/.ssh
  
  #ADD authorized_keys /home/fisto/.ssh/authorized_keys
  #RUN chown fisto:fisto /home/fisto/.ssh/authorized_keys
  #RUN chmod 644 /home/fisto/.ssh/authorized_keys
  
  # ssh
  RUN apt-get install -y openssh-server
  