LinuxCNC on Debian 10 Buster quick and easy install

That was my question, in the tutorials in the forum to install ethercat, they reference the iso that has to be downloaded that already has the "linuxcnc" included, but in the tutorial also download another linuxcnc that is the place , but they call that folder "linuxcnc - deb", by doing that they won't have 2 linuxcnc installed?

To which I could conclude that it is required to install linuxcnc in place to be able to install ethercat.

So if I did the test of using 2 images, you already take one with linuxcnc 2.8 and another with 2.9 and in the tutorial I skipped the step of installing linuxcnc in the place, but the installation could not be carried out as I thought it was required that is in the place linuxcnc

With the installation of packages an executable is generated as in the clip art?

With the installation of packages an executable is generated as in the pre-designed packages?

Sorry, I was wrong

So to generate a linuxcnc package it would be as follows?

$ git clone github.com/LinuxCNC/linuxcnc.git linuxcnc

$ cd linuxcnc

$ git checkout 2.8

$ linuxcnc / debian / => ./configure uspace => cd ..
$ linuxcnc / => dpkg-checkbuilddeps => sudo apt-get install ..... until done.
$ cd ..
$ dpkg-buildpackage -b -uc

And I tried 2 programs to mount iso images and if it mounts well but at the moment of wanting to install it does not recognize the ssd or hdd to install it and I know that it is not my computer because I tried 3 different, I think the images are damaged or Will the programs be used?

What program do you recommend that works?

Or a pre-designed package that you have already used and works that you can share with me.