anchor.diff:  
   # Create user and add to sudoers
   #  password: grabb
  -RUN useradd --create-home --shell /bin/bash grabb
  -RUN echo `echo "grabb\ngrabb\n" | passwd grabb`
  -RUN usermod -a -G sudo grabb
  +RUN useradd --create-home --shell /bin/bash grabb && echo `echo "grabb\ngrabb\n" | passwd grabb` &&  usermod -a -G sudo grabb
   
   # Create bin directory for the user
   RUN mkdir /home/grabb/bin
   
   # Install couple of prerequisites
   RUN echo "deb http://archive.ubuntu.com/ubuntu trusty main universe" > /etc/apt/sources.list
  -RUN apt-get update
  -RUN apt-get install -y exonerate
  -RUN apt-get install -y velvet
  -RUN apt-get install -y seqtk
  +RUN apt-get update && \
  +     apt-get install -y exonerate \
  +     velvet \
  +     seqtk
   
   # Copy executable files from local folder to the bin folder
   COPY docker/edena /home/grabb/bin/
  
positive.code: USER grabb
  
  # Add the bin folder to the path
  ENV PATH /home/grabb/bin:$PATH
negative.code: COPY LICENSE /home/grabb/
  
  # Copy the helper script for extra assemblers
  COPY external_skeleton.pl /home/grabb/
  
  # Change the owner of the files
  RUN chmod +x /home/grabb/bin/* && \
      chown grabb /home/grabb/bin/* && \
      chown grabb /home/grabb/*
  
  # Make the home directory the working directory
  WORKDIR /home/grabb
  