(superseeded) Linuxcnc on Linux Mint 19.3 quick and easy installation

[strike]If you have used that to make a Linux Mint bootable usb stick I guess, but Win32DiskImager is simple and reliable, it doesn't try to be too clever.[/strike]

freddie wrote: Yes it has that menu and I choose it. It shows the rt kernel I downloaded and that recovery mode, then the regular kernel and its recovery mode. Select the new kernel and it always goes back to same message, load kernel first, Can only boot by selecting original kernel.

What flawour of Mint are you using ?
From what you describe, there is no initrd and vmlinuz created or they are not in the boot folder.
I wonder how did that happen ????
I have installed this same setup over 30 times till now with Mint 19.1 and 19.2 and 19.3 and it never failed.
19.3 is a simple as install Mint, install 2 kona files, install Linuxcnc 2.9. Reboot and hold ctrl/shift.
Thats it.
Again just to be sure, i use Mint 64 bit Mate edition, never tested other versions.

It is mate 19.1. The boot message says the rt kernel has an invalid signature, whatever that means. I think I will wipe out 19.1 and install 19.3 and try again. I did not see the 2.9 version of linuxcnc but will check again. It is Mate 64 bit.

freddie wrote: It is mate 19.1. The boot message says the rt kernel has an invalid signature, whatever that means. I think I will wipe out 19.1 and install 19.3 and try again. I did not see the 2.9 version of linuxcnc but will check again. It is Mate 64 bit.

Wrong files.
Try these
simosnet.com/debian/packages/Konalinux/d...t5-kona-rt_amd64.deb
simosnet.com/debian/packages/Konalinux/d...t5-kona-rt_amd64.deb
Report back.
Thank you.

I had a feeling I had the wrong files since I was using them from your first post in 2018. I just burned a usb stick with 19.3 mate 64 and I will see how it goes. Thanks so much!

Ok, I have mate 19.3 installed and running. I installed the headers and image from the links you sent. Do I need a new link for the kernel? And the link for linuxcnc 2.9. Thanks