Скачать или смотреть How to install cuda on linux

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Step 1 - Delete all nvidia drivers and previous versions:
sudo apt-get --purge remove "*cublas*" "*cuda*" "*nsight*" "*cudnn*
sudo apt-get --purge remove "*nvidia*"
sudo rm -rf "/usr/local/cuda*"
Step 4 - Add these lines to your `~/.profile` file, so that other apps can find CUDA:
export CUDA_HOME=/usr/local/cuda
export PATH="$PATH:$CUDA_HOME/bin"
Step 7 - Install the package and the repository key, update package list and install the libraries:
sudo dpkg -i cudnn*.deb
(install the key as requested)
sudo apt update
sudo apt install libcudnn8 libcudnn8-dev