Ubuntu Xenial LTS Repository

Sorry to be a bother, I have tried the commands in this thread and discovered I am not competent enough to do this yet. I would appreciate some help.

I cannot use the prepackaged LinuxCNC iso images. The bundled kernel does not recognise my hardware.

I am doing a fresh install of Ubuntu 18.4 LTS on a new system. I thought these commands would allow me to do an "apt-get install" for the RT patches and linuxCNC. After which all would be installed. This is where my understanding failed me.

Would someone point me in the correct direction to learn how to setup the rt-kernel and linuxCNC up please?

I don't mind researching but so much of what I have googled is really out of date or a different distro and I cannot discern current valid instructions from deprecated or no longer supported advice.

I did read the PPA site and executed the sudo commands. But I don't know enough to understand if I was doing everything correctly.

thanks in advance.

forum.linuxcnc.org/9-installing-linuxcnc...h-rip-install-or-deb
This worked on Ubuntu 16.04, it should also work for 18.04, but probably with some more dependency issues, or maybe not.

Thanks tommylight. I appreciate you taking the time, but Mint 18.1 is Ubuntu 16.04 and it does not support my hardware. I read the thread before and found differences I did not understand.

The dependency issues seem to be the thorn in my side. I will keep plugging away. I read the official preempt-rt site and tried that , but its examples are also out of date. <sigh> The repository and file naming seem to have changed.

wiki.linuxfoundation.org/realtime/docume...#getting-the-sources

I'll keep plodding along. Thanks again

Ok I took another look at this and I see a patterns an one source of confusion:
I am rebuilding the kernel, I did not realize this initially.
How do I determine which version of the kernel to use?
I checked and it seems Ubuntu 18.4 is based on 4.15.
SO I guessed and selected Linux-4.15.18.tar.xz

Is this the correct one? If not, what guidelines / knowledge can I use to select the correct one in future.

Selecting the most current RT patch was "easy" since they point you to the most current. Which I assume is the "best" one, but I dunno for sure.

I will try to build these.

wiki.ubuntu.com/BionicBeaver/ReleaseNotes

So 18.04 is based on kernel 4.15

What does uname -a say when run on the original kernel?

I'm running this on Ubuntu 18.04 with LinuxCNC:

Linux dc7800 4.18.7-rt5 #1 SMP PREEMPT RT

The (updated) non RT kernel used by 18.04 is this: 4.15.0-34-generic