1: Minimize installation of centos7...
2: Use bridging.. Advanced, chip-paravirtualized website, all allowed, access network cable
3: May need yum update kernel, need to restart..
4:#yum install kernel-headers
#yum install kernel-devel
#yum install gcc*
#yum install make
5:mount /dev/cdrom /media
cd / media
sh ..box.sh
6:sudo mount -t vboxsf shared_file /test
7: Set up automatic mounting, restart the virtual machine and the system sharing is still there.
You can add an entry to /etc/fstab
shared_file / test vboxsf rw, gid = 110, uid = 1100, auto 0 0