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.