anchor.diff: +
   ##########################################################################
  -FROM ubuntu:15.10
  +FROM ubuntu:16.04
   MAINTAINER "Paolo D'Onorio De Meo <p.donoriodemeo@cineca.it>"
   
   ##########################################################################
  
positive.code: # IRODS icat server
  # install instructions: https://docs.irods.org/4.1.5/manual/installation
  WORKDIR /tmp
  ENV IRODSVERSION 4.1.8
  ENV IRODSFTP "ftp://ftp.renci.org/pub/irods"
  ENV IRODSRELEASES "$IRODSFTP/releases/$IRODSVERSION/ubuntu14"
  RUN wget -q $IRODSRELEASES/irods-icat-${IRODSVERSION}-ubuntu14-x86_64.deb
  RUN wget -q $IRODSRELEASES/irods-database-plugin-postgres-1.8-ubuntu14-x86_64.deb
  ENV IRODSGSI "$IRODSFTP/plugins/irods_auth_plugin_gsi/1.2"
  ENV IRODSGSI_DEB /opt/gsi.deb
  RUN wget -q $IRODSGSI/irods-auth-plugin-gsi-1.2-ubuntu14-x86_64.deb -O $IRODSGSI_DEB
  
  
  ##########################################################################
  
negative.code: # Saving configuration files for persistence on irods modifications
  #VOLUME /etc/irods
  
  #################
  ## The bad hack: (please change it in future docker releases)
  ## I'm forced to install deb files to save the configuration
  ## when volumes mapping would probably be available and easy
  RUN yes $IRODS_PASS | sudo -S dpkg -i irods*.deb
  
  #################
  # Remove remote validation
  USER root
  RUN sed -i '36s/https[^\"]\+/off/' /etc/irods/server_config.json
  USER $IRODS_USER
  
  #################
  # Installed, so enable persistence
  RUN mkdir copy && rsync -av /etc/irods/ copy/etcirods/
  
  