anchor.diff:  #RUN rm -f /lib/systemd/system/anaconda.target.wants/*
   #VOLUME /sys/fs/cgroup
   #CMD /usr/sbin/init
  +###
   
   #RUN ls -lh /lib64/libstdc*
  -#RUN ln -s 
  +
  +RUN groupadd -g $PGID $UNAME 
  +RUN useradd --create-home -s /bin/bash -u $PUID -g $PGID $UNAME
  +USER $UNAME
   
   ENV RPM_URL=${RPM_URL_ARG}
   WORKDIR /tmp/$UNAME
  
positive.code: RUN yum install -y maxon.rpm
  #RUN rm -f maxon.rpm
  
  RUN groupadd -g $PGID $UNAME 
  RUN useradd --create-home -s /bin/bash -u $PUID -g $PGID $UNAME
  USER $UNAME
  
  ENV HOSTNAME=${HOSTNAME_ARG}
  ENV MAXON_PORT=${MAXON_PORT_ARG}
  # these need to be writable
  VOLUME /opt/maxon/licenseserver
  VOLUME /var/opt/maxon/licenseserver
  EXPOSE ${MAXON_PORT}
  
  #ENV LM_LICENSE_FILE=/licenses
  ENV PATH=/opt/$UNAME/licenseserver/bin:${PATH}
  
negative.code: RUN yum install -y redhat-lsb-core wget net-tools
  RUN yum clean all;
  RUN rm -rf /var/cache/yum
  #### don't need this since centos generously provides a systemd image #### 
  # clean up systemd since we "need" it, h/t https://serverfault.com/questions/824975/failed-to-get-d-bus-connection-operation-not-permitted
  #RUN (cd /lib/systemd/system/sysinit.target.wants/; for i in *; do [ $i == systemd-tmpfiles-setup.service ] || rm -f $i; done)
  #RUN rm -f /lib/systemd/system/multi-user.target.wants/*
  