Reinstall Nvidia drivers and CUDA on Ubuntu

cuda_reinstall.txt

# Uninstall all nvidia packages, old drivers, etc.

# list all the packages with nvidia in the name
dpkg -l | grep -i nvidia

sudo apt-get remove --purge nvidia* 

sudo apt-get remove --purge cuda* 

sudo apt-get remove --purge libnccl* 

sudo apt-get remove --purge libnvidia* 

sudo apt remove --purge libcudnn* 

# keep going until you find no nvidia packages with dpkg -l 

# Install drivers and cuda together!
# Just go to https://developer.nvidia.com/cuda-downloads 
# Make sure it's the version you want
# Linux, x86_64, ubuntu, 18.04 (or the correct one for your machine), deb (network) 
# Download it, cd to downloads, and type the instructions on the website 
# example:

wget https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2204/x86_64/cuda-keyring_1.0-1_all.deb
sudo dpkg -i cuda-keyring_1.0-1_all.deb
sudo apt-get update
sudo apt-get -y install cuda

# Change these lines in your .bashrc to the appropriate version
export PATH=/usr/local/cuda-11.3/bin${PATH:+:${PATH}}
export LD_LIBRARY_PATH=/usr/local/cuda-11.3/lib64${LD_LIBRARY_PATH:+:${LD_LIBRARY_PATH}}

# Reboot 

# Verify drivers with 
nvidia-smi 
# Verify cuda with 
nvcc --version

# Install CUDNN 
# DON'T USE THE DEB FILE! Or if you do, you must install the DEVELOPER library AFTERWARDS!! 
# First runtime, then developer, then code samples
https://docs.nvidia.com/deeplearning/sdk/cudnn-install/index.html 


# Download the code samples, and follow the post installation verification 
# Involves running MNISTCudnn 

# Do the post-installation actions: 
# Involves adding two lines to the ~/.bashrc file 
https://docs.nvidia.com/cuda/cuda-installation-guide-linux/index.html 

# Install NCCL: OPTIONAL
https://docs.nvidia.com/deeplearning/sdk/nccl-install-guide/index.html