ubuntu18.04 卸载CUDA10.0 安装CUDA10.2、CUDNN

1 卸载CUDA 10.0

进入/usr/local/cuda/bin 目录下,有cuda 自带的卸载工具uninstall_cuda_10.0.pl，输入命令：

cd /usr/local/cuda/bin
sudo ./uninstall_cuda_10.0.pl

卸载完，删除相关文件夹：

sudo rm -rf /usr/local/cuda-10.0/

卸载完毕。

2 安装CUDA 10.2

去官网查看下载
按官方命令输入：

wget https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64/cuda-ubuntu1804.pin

sudo mv cuda-ubuntu1804.pin /etc/apt/preferences.d/cuda-repository-pin-600

wget https://developer.download.nvidia.com/compute/cuda/10.2/Prod/local_installers/cuda-repo-ubuntu1804-10-2-local-10.2.89-440.33.01_1.0-1_amd64.deb

sudo dpkg -i cuda-repo-ubuntu1804-10-2-local-10.2.89-440.33.01_1.0-1_amd64.deb

sudo apt-key add /var/cuda-repo-10-2-local-10.2.89