2.9 Install Help

I have two hard drives. On one linuxcnc2.8 second linuxcnc2.9. Both are installed from the official image. Especially for you, I go to linuxcnc 2.8 and edit the repository as in screenshot number 2. Click update-mark updates and we see that the system is ready to install linuxcnc2.9 and the necessary changes. It remains to click apply. When installing from an image, do not create a superuser. Desktop environment select mate.