2. Uninstall NVIDIA CUDA Toolkit 12.1 on Ubuntu 21.10 / Debian 11 / Linux Mint 20.3⌗

2.1 Change root user⌗ 

su -
## OR ##
sudo -i

2.2 Run NVIDIA CUDA Uninstall Script⌗ 

/usr/local/cuda/bin/cuda-uninstaller

NVIDIA CUDA uninstaller 12.1 ubuntu debian linux mint

2.3 Remove /etc/profile.d/cuda.sh⌗ 

rm /etc/profile.d/cuda.sh

Then logout/login get NVIDIA CUDA away from PATH and LD_LIBRARY_PATH.