anchor.diff:  
   MAINTAINER github.com/jasonswindle
   
  -# https://github.com/dotcloud/docker/issues/4846 and move SSH to a different port
  -RUN sed -i 's/session    required     pam_loginuid.so/#session    required     pam_loginuid.so/' /etc/pam.d/sshd
  +# Set correct environment variables.
  +ENV HOME /root
   
   # Set root's password
   RUN echo "root:changeme" | chpasswd
   
  -# Set correct environment variables.
  -ENV HOME /root
  +# Add the user rsync, touch the authorized_keys file, chown
  +RUN useradd rsync_user --create-home
  +RUN touch /home/rsync_user/.ssh/authorized_keys
  +RUN chown rsync_user:rsync_user -R /home/rsync_user/.ssh \
  +            && chmod 0700 /home/rsync_user/.ssh \
  +            && chmod 0644 /home/rsync_user/.ssh/authorized_keys
   
   # Update apt's cache
   RUN apt-get update
   
   ## Install what we need
  -RUN apt-get install -y \
  +RUN apt-get install -y -q --no-install-recommends \
               python-pip \
               man \
               wget \
               sudo \
               software-properties-common \
               locales \
  +            ca-certificates \
               ntp
   
   # Ensure UTF-8
   RUN locale-gen en_US.UTF-8 && update-locale
  +
  +# Set the timezone
  +RUN echo "US/Central" > /etc/timezone && dpkg-reconfigure --frontend noninteractive tzdata
   
   # Install Salt Master (of Masters)
   RUN add-apt-repository ppa:saltstack/salt
  
positive.code: RUN chmod 0755 -Rv /etc/service/
  
  # SSH Config
  ADD ./files/ssh/sshd_config /etc/ssh/sshd_config
  
  # Clean up APT when done.
  RUN apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
  
  # Use baseimage-docker's init system.
  CMD ["/sbin/my_init"]
  
negative.code: RUN apt-get update
  
  # Install Salt Master
  RUN apt-get install -y -q --no-install-recommends \
              salt-master
  
  # Make this Salt Master, Master of Masters
  RUN echo "order_masters: True" > /etc/salt/master.d/syndic.conf
  
  # Add runit scripts
  ADD ./files/runit/ /etc/service/
  