anchor.diff:    apt-get update -qqy && \
     apt-get upgrade -y -o Dpkg::Options::="--force-confold" && \
     apt-get install -qqy --allow-downgrades \
  -    bash build-essential curl dash elinks git graphviz imagemagick figlet \
  +    bash build-essential curl dash elinks git graphviz imagemagick \
  +    figlet update-motd \
       make man moreutils netcat nodejs npm pandoc php-cli posh \
       python python-dev python-tox python-yaml \
       realpath ruby-full rubygems socat sqlite3 ssh sudo tmux tree uuid-runtime \
  
positive.code: 
  RUN \
    chgrp supergroup /etc/container_environment && \
    chmod g+rx /etc/container_environment
  
  
  USER $username
  
negative.code: # usermod does not find the added user otherwise.
  RUN \
    adduser --system --home /home/$username --shell /bin/bash --group $username && \
    usermod $username -a -G sudo,staff,supergroup,ssh && \
    \
    mkdir -vp /home/$username/project && \
    git clone https://github.com/basherpm/basher.git /home/$username/.basher && \
  