Installing LinuxCNC on Debian 9

Download https://cdimage.debian.org/cdimage/unofficial/non-free/cd-including-firmware/9.4.0+nonfree/amd64/iso-cd/firmware-9.4.0-amd64-netinst.iso and rename it to debian-firmware-9.4.0-amd64-netinst.iso

Burn to a CD
Boot from the CD
Graphical Install
Do Not enter a Root Password! Just hit enter.
Debian desktop environment
Mate
SSH server
standard system utilities

after booting to Debian 9 open a terminal

sudo nano /etc/lightdm/lightdm.conf
to log in without your user name a password uncomment
and add your user name
autologin-user=john
autologin-user-timeout=0

CTRL X and yes to save and exit.

Open the Synaptic Package Manager
search for linux-image and install linux-image-4.9.0.6-rt

reboot the pc
in a terminal type uname -a it should report back PREEMT RT

Linux d9-uspace 4.9.0-6-rt-amd64 #1 SMP PREEMPT RT Debian 4.9.82-1+deb9u3 (2018-03-02) x86_64 GNU/Linux

in a terminal
sudo apt-get update
sudo apt-get dist-upgrade
sudo apt-get install dirmngr
sudo apt-key adv --keyserver hkp://keys.gnupg.net --recv-key 3cb9fd148f374fef
sudo apt-get install software-properties-common
sudo add-apt-repository "deb http://linuxcnc.org/ stretch base 2.7-uspace"
sudo apt-get update
sudo apt-get install linuxcnc-uspace

Configure the network adapter to work with an ethernet card
To find the ethernet adapter name
ip link show
or
ip a

sudo nano /etc/network/interfaces

auto enp0s25 << change to match your interface name
  iface enp0s25 inet static
    address 10.10.10.1
    netmask 255.255.255.0