ubuntu16.04安装多个版本CUDA的方法

sudo chmod +x cuda_9.0.176_384.81_linux.run # 为 cuda_9.0.176_384.81_linux.run 添加可执行权限 
./cuda_9.0.176_384.81_linux.run # 安装 cuda_9.0.176_384.81_linux.run

Install NVIDIA Accelerated Graphics Driver for Linux-x86_64 384.81?
(y)es/(n)o/(q)uit: n #我已经装过CUDA10了，所以不需要安转9.0的显卡驱动
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 #使用超级用户权限
Please enter your password: Do you want to install a symbolic link at /usr/local/cuda? # 是否将安装目录通过软连接的方式 link 到 /usr/local/cuda，yes or no 都可以，取决于你是否使用 /usr/local/cuda 为默认的 cuda 目录。 
(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 ]:#直接回车

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