Error during install RTAI Kernel on Debian 12

Hi,
I am attempting to install the RTAI kernel on a fresh installation of Debian Bookworm, following the instructions provided in the LinuxCNC Documentation 2.9.Here are the steps I have taken:

1. Executed the script ( www.linuxcnc.org/linuxcnc-install.sh)
2. Ran the following commands :
   1. -> sudo apt-get update
   2. -> sudo apt-get install linuxcnc 

​​​​​​​However, I encountered an error during the installation process:
dpkg: error processing archive /var/cache/apt/archives/linuxcnc_1%3a2.9.2_amd64.deb (--unpack): trying to overwrite '/usr/share/applications/linuxcnc-documentation.desktop', which is also in package linuxcnc-doc-en 1:2.9.2

I would appreciate any assistance or guidance to resolve this issue.

Thank you.

Okay, I will try that out. I guess the kernel after installation will be the preempt kernel, but can I install the RTAI kernel with the same steps I mentioned in my first question?

I've done that, but LinuxCNC is not available. When I tried to update my apt repository using the script in 7.1, I encountered an error:

E: Conflicting values set for option Signed-By regarding source www.linuxcnc.org/ bookworm: /etc/apt/trusted.gpg.d/linuxcnc.gpg.key.binary.gpg != /usr/share/keyrings/linuxcnc.gpg
E: The list of sources could not be read

I also tried the LinuxCNC .deb package directly from the Downloads page, but the Package Installer aborts without any notification.
(www.linuxcnc.org/dists/bookworm/2.9-rt/b...xcnc_2.9.2_amd64.deb)

I also get the same error on linux mint Debian Edition.

sudo apt-get install linuxcnc
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following package was automatically installed and is no longer required:
libgpiod2
Use 'sudo apt autoremove' to remove it.
Suggested packages:
mesaflash
The following NEW packages will be installed:
linuxcnc
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/25.5 MB of archives.
After this operation, 89.8 MB of additional disk space will be used.
(Reading database ... 551179 files and directories currently installed.)
Preparing to unpack .../linuxcnc_1%3a2.9.2_amd64.deb ...
Unpacking linuxcnc (1:2.9.2) ...
dpkg: error processing archive /var/cache/apt/archives/linuxcnc_1%3a2.9.2_amd64.deb (--unpack):
trying to overwrite '/usr/share/applications/linuxcnc-documentation.desktop', which is also in package linuxcnc-doc-en 1:2.9.2
Errors were encountered while processing:
/var/cache/apt/archives/linuxcnc_1%3a2.9.2_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)


I have already installed the RTAI kernal and booted into it before attempting this command.

Try just installing the Linuxcnc package, after removing the docs package

wget linuxcnc.org/dists/bookworm/2.9-rt/binar...xcnc_2.9.2_amd64.deb

sudo apt install ./linuxcnc_2.9.2_amd64.deb

The issue is with the docs package, which isn't really required for a basic install.

That fixed my issue. Thank you.

I'm trying to upgrade from linuxcnc 2.8 to 2.9 rtai on Debian 10 and I'm also having the same problem, the strange thing is that I've done this same procedure several times and it always worked, now it doesn't work anymore