ubuntu16.04如何安裝多個版本的CUDA

我的機器是CUDA16.04的，之前裝過CUDA10.0，因為一些原因，現在需要安轉CUDA9.0。

1.首先https://developer.nvidia.com/cuda-90-download-archive?target_os=Linux&target_arch=x86_64&target_distro=Ubuntu&target_version=1604&target_type=runfilelocal

下載run版本的（如果之前沒裝過CUDA，可以下載deb版本的）

2.按照上面的教程

sudo chmod +x cuda_9.0.176_384.81_linux.run # 為 cuda_9.0.176_384.81_linux.run 添加可執行許可權 
./cuda_9.0.176_384.81_linux.run # 安裝 cuda_9.0.176_384.81_linux.run

3.相關參數的設置

Install NVIDIA Accelerated Graphics Driver for Linux-x86_64 384.81?

(y)es/(n)o/(q)uit: n #我已經裝過CUDA10了，所以不需要安轉9.0的顯卡驅動

Install the CUDA 9.0 Toolkit? 
(y)es/(n)o/(q)uit: y


/usr/local/cuda-9.0 is not writable. 
Do you wish to run the installation with 'sudo'? (y)es/(n)o: y #使用超級用戶許可權

Please enter your password: Do you want to install a symbolic link at /usr/local/cuda? # 是否將安裝目錄通過軟連接的方式 link 到 /usr/local/cuda，yes or no 都可以，取決於你是否使用 /usr/local/cuda 為預設的 cuda 目錄。 
(y)es/(n)o/(q)uit: y  #我目前需要使用9.0

 

Enter Toolkit Location
[ default is /usr/local/cuda-9.0 ]:#直接回車

4.安轉結束後相關環境變數的設置

Finished copying samples.

===========
= Summary =
===========

Driver:   Not Selected
Toolkit:  Installed in /usr/local/cuda-9.0
Samples:  Installed in /usr/local/cuda-9.0/Samples

Please make sure that
 -   PATH includes /usr/local/cuda-9.0/bin
 -   LD_LIBRARY_PATH includes /usr/local/cuda-9.0/lib64, or, add /usr/local/cuda-9.0/lib64 to /etc/ld.so.conf and run ldconfig as root

To uninstall the CUDA Toolkit, run the uninstall script in /usr/local/cuda-9.0/bin

Please see CUDA_Installation_Guide_Linux.pdf in /usr/local/cuda-9.0/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 384.00 is required for CUDA 9.0 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_11003.log

如上，需要設置PATH和LD_LIBRARY_PATH兩個變數，在./bashrc文件中修改即可，記得要source一些./bashrc，讓其生效。

完成上面這些步驟後，就可以進行多個版本的切換了，直接修改/usr/local/cuda即可，使其指向不同版本的CUDA。