Install Docker in Centos 6.8
rpm -iUvh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
yum -y install docker-io
service docker start
chkconfig docker on
docker search centos6.8
docker pull centos:6.8
docker images (to verify the centos 6.8 image is ready)