Problem in CUDA 11.5

Accelerated Computing CUDA CUDA Setup and Installation
1

Hi everyone
I tried very hard to uninstall the CUDA 11.5 version of my Ubuntu 20.4 after it was downloaded in the updates and affected the NVC version
But there were other problems and I could not remove 11.5 or restore it
Where the compatible version was CUDA 11.1

And I got these errors

oliver@victus:~$ nvcc --version
nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2021 NVIDIA Corporation
Built on Thu_Nov_18_09:45:30_PST_2021
Cuda compilation tools, release 11.5, V11.5.119
Build cuda_11.5.r11.5/compiler.30672275_0
oliver@victus:~$ nvidia-smi

Command 'nvidia-smi' not found, but can be installed with:

sudo apt install nvidia-340               # version 340.108-0ubuntu5.20.04.2, or
sudo apt install nvidia-utils-390         # version 390.154-0ubuntu0.20.04.1
sudo apt install nvidia-utils-450-server  # version 450.203.03-0ubuntu0.20.04.1
sudo apt install nvidia-utils-470         # version 470.141.03-0ubuntu0.20.04.1
sudo apt install nvidia-utils-470-server  # version 470.141.03-0ubuntu0.20.04.1
sudo apt install nvidia-utils-510         # version 510.85.02-0ubuntu0.20.04.1
sudo apt install nvidia-utils-510-server  # version 510.85.02-0ubuntu0.20.04.1
sudo apt install nvidia-utils-515         # version 515.65.01-0ubuntu0.20.04.1
sudo apt install nvidia-utils-515-server  # version 515.65.01-0ubuntu0.20.04.1
sudo apt install nvidia-utils-435         # version 435.21-0ubuntu7
sudo apt install nvidia-utils-440         # version 440.82+really.440.64-0ubuntu6
sudo apt install nvidia-utils-418-server  # version 418.226.00-0ubuntu0.20.04.2

Please help, knowing that this environment my daughter is completely new to me
Please help and clarify the problem

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