###here it is for testing purpose, you will build a pure centos base docker image (keep only one yum line of course)
###here it is for testing purpose, you will build a pure centos base docker image (keep only one yum line of course)
#yum -c "/root/repo_file" --installroot="$target" --setopt=tsflags=nodocs --setopt=group_package_types=mandatory -y groupinstall Core ###this line is to test and build a pure centos base in order to test
#yum -c "/root/repo_file" --installroot="$target" --setopt=tsflags=nodocs --setopt=group_package_types=mandatory -y groupinstall Core ###this line is to test and build a pure centos base in order to test