anchor.diff:  # Set volume for systemd
   VOLUME [ "/sys/fs/cgroup" ]
   
  -# Open Ports: 
  -# Apache: 80/tcp, 443/tcp Postfix: 25/tcp, 587/tcp 
  +# Open Ports:
  +# Apache: 80/tcp, 443/tcp Postfix: 25/tcp, 587/tcp
   # Dovecot: 110/tcp, 143/tcp, 993/tcp, 995/tcp
   EXPOSE 80 443 25 587 110 143 993 995
   
  
positive.code:     rm iRedMail-$IREDMAIL_VERSION.tar.bz2
  
  # Install systemd
   RUN yum -y reinstall systemd; yum clean all; \ 
       (cd /lib/systemd/system/sysinit.target.wants/; for i in *; do [ $i == systemd-tmpfiles-setup.service ] || rm -f $i; done); \
       rm -f /lib/systemd/system/multi-user.target.wants/*;\
       rm -f /etc/systemd/system/*.wants/*;\
       rm -f /lib/systemd/system/local-fs.target.wants/*; \
  
negative.code: # Connect bash:
  # docker exec -it container_name bash
  
  # Pull base image
  FROM centos:latest
  
  # Maintener
  MAINTAINER Burke Azbill <dimensionquest@gmail.com>
  
  # Env
  ENV IREDMAIL_VERSION 0.9.5-1
  ENV container docker
  ENV HOME /root
  WORKDIR /root
  
  # Install packages necessary:
  RUN yum update -y; \
      yum install -y unzip wget curl git tar bzip2 hostname rsyslog openssl epel-release; \
      yum -y reinstall systemd; \
      yum clean all
  
  # Get iredmail, extract and remove tar
  RUN mkdir -p /opt/iredmail; \
  