I was following the chain of commands provided here:
https://developer.nvidia.com/cuda-downloads?target_os=Linux&target_arch=x86_64&Distribution=WSL-Ubuntu&target_version=2.0&target_type=deb_local
to install cuda (v11.6) on wsl2. However, the last three lines failed. Here is what is in the terminal:

(base) peter72@Peter72:~$ sudo apt-key add /var/cuda-repo-wsl-ubuntu-11-6-local/7fa2af80.pub

Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)).

OK



(base) peter72@Peter72:~$ sudo apt-get update

Get:1 file:/var/cuda-repo-wsl-ubuntu-11-5-local  InRelease

Ign:1 file:/var/cuda-repo-wsl-ubuntu-11-5-local  InRelease

Get:2 file:/var/cuda-repo-wsl-ubuntu-11-6-local  InRelease

Ign:2 file:/var/cuda-repo-wsl-ubuntu-11-6-local  InRelease

Get:3 file:/var/cuda-repo-wsl-ubuntu-11-5-local  Release

Err:3 file:/var/cuda-repo-wsl-ubuntu-11-5-local  Release

  File not found - /var/cuda-repo-wsl-ubuntu-11-5-local/Release (2: No such file or directory)

Get:4 file:/var/cuda-repo-wsl-ubuntu-11-6-local  Release [564 B]

Get:4 file:/var/cuda-repo-wsl-ubuntu-11-6-local  Release [564 B]

Get:6 http://security.ubuntu.com/ubuntu jammy-security InRelease [110 kB]

Hit:7 https://nvidia.github.io/libnvidia-container/stable/ubuntu18.04/amd64  InRelease

Hit:8 https://nvidia.github.io/nvidia-container-runtime/stable/ubuntu18.04/amd64  InRelease

Hit:9 http://archive.ubuntu.com/ubuntu jammy InRelease

Hit:10 https://nvidia.github.io/nvidia-docker/ubuntu18.04/amd64  InRelease

Hit:11 http://archive.ubuntu.com/ubuntu jammy-updates InRelease

Hit:12 http://archive.ubuntu.com/ubuntu jammy-backports InRelease

Reading package lists... Done

E: The repository 'file:/var/cuda-repo-wsl-ubuntu-11-5-local  Release' no longer has a Release file.

N: Updating from such a repository can't be done securely, and is therefore disabled by default.

N: See apt-secure(8) manpage for repository creation and user configuration details.

W: file:/var/cuda-repo-wsl-ubuntu-11-6-local/Release.gpg: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.

W: https://nvidia.github.io/libnvidia-container/stable/ubuntu18.04/amd64/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.

W: https://nvidia.github.io/nvidia-container-runtime/stable/ubuntu18.04/amd64/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.

W: https://nvidia.github.io/nvidia-docker/ubuntu18.04/amd64/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.



(base) peter72@Peter72:~$ sudo apt-get -y install cuda

Reading package lists... Done

Building dependency tree... Done

Reading state information... Done

Some packages could not be installed. This may mean that you have

requested an impossible situation or if you are using the unstable

distribution that some required packages have not yet been created

or been moved out of Incoming.

The following information may help to resolve the situation:



The following packages have unmet dependencies:

 libcufile-11-6 : Depends: liburcu6 but it is not installable

E: Unable to correct problems, you have held broken packages.

In the attempt to fix them, I downloaded another cuda version (v11.5) in hopes that it will work, but it didn't. I also removed the cuda repo folders manually, which led to chaos that I can't fix. I tried purging cuda and nvidia in the attempt to start fresh, but it didn't deliver.