一 CUDA的安裝

查看安裝的nvidia驅動版本號

nvidia-smi //第一行信息

選擇安裝的CUDA版本並下載
下載地址
 英偉達官方的cuda和驅動的對應
安裝CUDA

sudo sh cuda_8.0.61_375.26_linux.run

就進入安裝了，開始的一大堆文字都是End User License Agreement，可以CTRL +C 跳過，然後輸入accept表示接受協議。

Do you accept the previously read EULA?
accept/decline/quit:accept
 
Install NVIDIA Accelerated Graphics Driver for Linux-x86_64 367.48?
(y)es/(n)o/(q)uit: n
 
Install the CUDA 8.0 Toolkit?
(y)es/(n)o/(q)uit: y
 
Enter Toolkit Location
 [ default is /usr/local/cuda-8.0 ]: 
 
Do you want to install a symbolic link at /usr/local/cuda?
(y)es/(n)o/(q)uit: y
 
Install the CUDA 8.0 Samples?
(y)es/(n)o/(q)uit: y
Enter CUDA Samples Location
 [ default is /home/kinny ]:
Installing the CUDA Toolkit in /usr/local/cuda-8.0 ...
Missing recommended library: libXmu.so
Installing the CUDA Samples in /home/kinny ...
Copying samples to /home/kinny/NVIDIA_CUDA-8.0_Samples now...
Finished copying samples.
===========
= Summary =
===========
Driver:   Not Selected
Toolkit:  Installed in /usr/local/cuda-8.0
Samples:  Installed in /home/kinny, but missing recommended libraries
Please make sure that（環境變量按如下方式添加）
 -   PATH includes /usr/local/cuda-8.0/bin
 -   LD_LIBRARY_PATH includes /usr/local/cuda-8.0/lib64, or, add /usr/local/cuda-8.0/lib64 to /etc/ld.so.conf and run ldconfig as root
To uninstall the CUDA Toolkit, run the uninstall script in /usr/local/cuda-8.0/bin
Please see CUDA_Installation_Guide_Linux.pdf in /usr/local/cuda-8.0/doc/pdf for detailed information on setting up CUDA.
***WARNING: Incomplete installation! This installation did not install the CUDA Driver. A driver of version at least 361.00 is required for CUDA 8.0 functionality to work.
To install the driver using this installer, run the following command, replacing <CudaInstaller> with the name of this run file:
    sudo <CudaInstaller>.run -silent -driver
Logfile is /tmp/cuda_install_17494.log

注意：
安裝時可能出現錯誤：cuda:Missing recommended library: libGLU.so,libX11.so,libXi.so,libXmu.so
解決方案：方案1、方案2、方案3
（這個錯誤我沒解決，不知道後續有沒有影響）
4. 配置Cuda環境變量：

sudo su //切換爲root超級用戶的命令
sudo gedit ~/.bashrc //打開.bashrc文件

在 ~/.bashrc 的最後添加：

export PATH=/usr/local/cuda-8.0/bin${PATH:+:${PATH}}
export LD_LIBRARY_PATH=/usr/local/cuda-8.0/lib64${LD_LIBRARY_PATH:+:${LD_LIBRARY_PATH}}

配置完環境變量之後，一定要更新一下，否則不能立即生效。也可以通過重啓電腦使得環境變量生效：

source ~/.bashrc
nvcc --version  //檢查安裝是否成功

如果顯示下面的文字就說明安裝成功了：
nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2018 NVIDIA Corporation
Built on Tue_Jun_12_23:07:04_CDT_2018
Cuda compilation tools, release 9.2, V9.2.148

su username //可切換普通用戶的命令

二 CUDA的安裝

下載cuDNN
首先到官網下載cuDNN（ https://developer.nvidia.com/cudnn ），需要註冊爲開發者才能下載，而且直接下載可能速度非常慢，如果有別人已經下載過的，應該是可以直接拿過來用，不過前提是版本是對應的。
文件名爲：cudnn-××××.tgz，解壓：

tar xvzf cudnn-9.2-linux-x64-v7.6.4.38.tgz

解壓後可以看到cuda文件夾，在當前目錄打開終端，然後將庫和頭文件copy到cuda目錄並修改文件訪問權限：

sudo cp cuda/include/cudnn.h /usr/local/cuda/include/
sudo cp cuda/lib64/libcudnn* /usr/local/cuda/lib64/
sudo chmod a+r /usr/local/cuda/include/cudnn.h 
sudo chmod a+r /usr/local/cuda/lib64/libcudnn*

檢查查看cudnn版本

cat /usr/local/cuda/include/cudnn.h | grep CUDNN_MAJOR -A 2

如果顯示下面的文字就說明安裝成功了：
#define CUDNN_MAJOR 7
#define CUDNN_MINOR 6
#define CUDNN_PATCHLEVEL 4
--
#define CUDNN_VERSION (CUDNN_MAJOR * 1000 + CUDNN_MINOR * 100 + CUDNN_PATCHLEVEL)
#include "driver_types.h"