```
sudo apt-get update
sudo apt-get dist-upgrade
sudo apt-get install dirmngr
sudo apt-get install software-properties-common
sudo apt-key adv --keyserver hkp://keys.gnupg.net --recv-key E0EE663E
sudo add-apt-repository "deb http://buildbot.linuxcnc.org/ stretch master-rtpreempt"
sudo apt-get update
sudo apt-get install linuxcnc-uspace