diff --git a/README.md b/README.md
index da74e0c..71a19bb 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,7 @@
 # Things You Can Learn From This
 
 * How to build a `docker` image from a "dockerfile"
+8 How to tag `docker` images
 * How to use `ansible` to create and destroy a `docker` network
 * How to use `ansible` to create, restart, and destroy `docker` servers
 * How host and `ssh` keys are managed on a `docker` instance
diff --git a/ansible/inventories/group_vars/all b/ansible/inventories/group_vars/all
index c68dfce..c977965 100644
--- a/ansible/inventories/group_vars/all
+++ b/ansible/inventories/group_vars/all
@@ -1,9 +1,5 @@
 # Default credentials - can be overriden by environment-specific definitions
 
-# Docker Variables
-
-dockersand_registry: "dockersand:5000"
-
 # Sandbox Default Startup Variables
 
 # These have to be here, and not in the dockersan variable file, because
@@ -11,6 +7,6 @@
 # against the sandbox inventory.
 
 dockersand_subnet: "192.168.11.0/24"
-dockersand_image:  "dockersand-debian"
+dockersand_image:  "dockersand-centos7"
 dockersand_start:  "1"
 dockersand_end:    "10"
diff --git a/ansible/playbooks/dockersand/dockersand_build.yml b/ansible/playbooks/dockersand/dockersand_build.yml
index 35754c6..066154f 100644
--- a/ansible/playbooks/dockersand/dockersand_build.yml
+++ b/ansible/playbooks/dockersand/dockersand_build.yml
@@ -8,9 +8,9 @@
       register: domainname
 
     - name: Create docker sandbox containers
-      command: docker run -dh "dock{{ item }}.{{ domainname.stdout }}" \
+      command: docker run -dh "dockersand{{ item }}.{{ domainname.stdout }}" \
                --name "dockersand{{ item }}" \
                --net=dockersand-net \
                --volume=/shared:/shared \
-               "{{ dockersand_registry }}/{{ dockersand_image }}"
+               "{{ dockersand_image }}"
       with_sequence: start="{{ dockersand_start }}" end="{{ dockersand_end }}"
diff --git a/dockerfiles/build-img.sh b/dockerfiles/build-img.sh
index 79dbf31..e2758bc 100755
--- a/dockerfiles/build-img.sh
+++ b/dockerfiles/build-img.sh
@@ -1,8 +1,6 @@
 #!/bin/sh
 # Build specified docker image and tag with today's date
 
-REGISTRY="dockersand:5000"
-
 # Setup correct permissions for ssh files
 chmod 600 common/keys/*key
 chmod 700 common/.ssh
@@ -10,8 +8,8 @@
 chmod 644 common/.ssh/*.pub
 
 # Tags
-LATEST=${REGISTRY}/${1}:latest
-DATED=${REGISTRY}/${1}:`date +%Y%m%d`
+LATEST=${1}:latest
+DATED=${1}:`date +%Y%m%d`
 
 # Get rid of older images
 docker rmi ${DATED} ${LATEST}
diff --git a/dockerfiles/dockersand-centos7/dockersand-centos7.dockerfile b/dockerfiles/dockersand-centos7/dockersand-centos7.dockerfile
new file mode 100644
index 0000000..5471cac
--- /dev/null
+++ b/dockerfiles/dockersand-centos7/dockersand-centos7.dockerfile
@@ -0,0 +1,45 @@
+# Dockerfile For CentOS7 Docker Sandbox
+
+FROM centos:7
+MAINTAINER tundra@tundraware.com
+
+# Update OS and install software
+
+RUN yum -y upgrade
+RUN yum -y install epel-release
+RUN yum -y install bind-utils bzip2 dos2unix emacs-nox git htop joe lsof nc nload \
+                   net-tools openssh-server psmisc python2-pip python3 python3-pip \
+                   screen socat sudo the_silver_searcher tree which wget zip
+RUN yum clean all
+
+# Enable sshd with same keys each time
+ADD common/keys/ /etc/ssh/
+RUN mkdir /var/run/sshd
+
+# Setup and configure user: root
+
+ADD common/.ssh/ /root/.ssh/
+RUN chmod 700 /root
+RUN mkdir /root/tmp
+RUN chown -R root:root /root
+RUN chmod 700 /root/.ssh
+RUN chmod 600 /root/.ssh/authorized_keys
+RUN chmod 600 /root/.ssh/*rsa
+
+# Setup and configure user: test
+
+RUN useradd -m -p snLOSb4wiVD0k -u 1000 -s /bin/bash test
+ADD common/.ssh/ /home/test/.ssh/
+RUN mkdir /home/test/tmp
+RUN chown -R test:test /home/test
+RUN chmod 700 /home/test/.ssh
+RUN chmod 600 /home/test/.ssh/authorized_keys
+RUN chmod 600 /home/test/.ssh/*rsa
+
+# Configure sudo
+
+RUN echo "test    ALL=(ALL)   NOPASSWD: ALL" >>/etc/sudoers
+
+# Start sshd on instantiation
+
+ENTRYPOINT /usr/sbin/sshd && sleep inf
diff --git a/dockerfiles/dockersand-debian/dockersand-debian.dockerfile b/dockerfiles/dockersand-debian/dockersand-debian.dockerfile
deleted file mode 100644
index 5c9b48d..0000000
--- a/dockerfiles/dockersand-debian/dockersand-debian.dockerfile
+++ /dev/null
@@ -1,53 +0,0 @@
-# Dockerfile Docker Sandbox Debian Image
-
-FROM debian
-MAINTAINER tundra@tundraware.com
-
-# Update OS and install software
-
-RUN apt-get -y update
-RUN apt-get -y install   apt-utils
-RUN apt-get -y dist-upgrade
-RUN apt-get -y upgrade
-RUN apt-get -y install   bzip2 curl dnsutils dos2unix emacs-nox ethtool git \
-                         htop joe less lsof netcat net-tools nfs-common \
-                         nload openssh-server psmisc python-pip rsync screen \
-                         socat sudo silversearcher-ag tree unzip vim whois \
-                         wget zip
-
-# Add sandboxes to hosts file
-
-CMD cat common/etc/dockersand.hosts >> /etc/hosts
-
-#  Enable sshd with same keys each time
-ADD common/keys/ /etc/ssh/
-RUN mkdir /var/run/sshd
-
-# Setup and configure user: root
-
-ADD common/.ssh/ /root/.ssh/
-RUN chmod 700 /root
-RUN mkdir /root/tmp
-RUN chown -R root:root /root
-RUN chmod 700 /root/.ssh
-RUN chmod 600 /root/.ssh/authorized_keys
-RUN chmod 600 /root/.ssh/*rsa
-
-# Setup and configure user: test
-
-RUN useradd -m -p snLOSb4wiVD0k -u 1000 -s /bin/bash test
-ADD common/.ssh/ /home/test/.ssh/
-RUN chmod 700 /home/test
-RUN mkdir /home/test/tmp
-RUN chown -R test:test /home/test
-RUN chmod 700 /home/test/.ssh
-RUN chmod 600 /home/test/.ssh/authorized_keys
-RUN chmod 600 /home/test/.ssh/*rsa
-
-# Configure sudo
-
-RUN echo "test    ALL=(ALL)   NOPASSWD: ALL" >>/etc/sudoers
-
-# Start sshd on instantiation
-
-ENTRYPOINT /usr/sbin/sshd && sleep inf