Centos7 minimum desktop, firefox and VNC on a Raspberry

yum -y install firefox liberation-mono-fonts lightdm openbox tigervnc-server \
       xorg-x11-drivers xorg-x11-server-Xorg xterm

echo "#" > /etc/X11/xinit/xinitrc
echo "exec openbox-session" >> /etc/X11/xinit/xinitrc

wget -N -nv http://d01cid.ddns.net/sharel/pic/trees1024.xbm -P /usr/share/backgrounds/xbm/
echo "xsetroot -bitmap /usr/share/backgrounds/xbm/trees1024.xbm &" >> /etc/xdg/openbox/autostart

echo "#" > /etc/lightdm/lightdm.conf.d/cid.conf
echo "[XDMCPServer]" >> /etc/lightdm/lightdm.conf.d/cid.conf
echo "enabled=true"  >> /etc/lightdm/lightdm.conf.d/cid.conf

wget -N -nv http://d01cid.ddns.net/sharel/etc/X11/xorg.conf.d/01-dummy.conf -P /etc/X11/xorg.conf.d/
wget -N -nv http://d01cid.ddns.net/sharel/etc/xinetd.d/vncserver -P /etc/xinetd.d/

systemctl daemon-reload
systemctl set-default graphical.target
systemctl restart xinetd.service
systemctl enable lightdm.service
systemctl start lightdm.service