Ubuntu已有cuda10.0再安装cuda9.1

cuda9.1下载链接

https://developer.nvidia.com/cuda-91-download-archive?target_os=Linux&target_arch=x86_64&target_distro=Ubuntu&target_version=1704&target_type=runfilelocal

　　

sudo apt-get install freeglut3-dev build-essential libx11-dev libxmu-dev libxi-dev libgl1-mesa-glx libglu1-mesa libglu1-mesa-dev 
 
 
sudo sh cuda_8.0.61_375.26_linux.run #开始安装
 
#..一堆协议说明...
#直接按q退出协议说明.
zerozone@zerozone: accept/decline/quit: accept  #接受协议
 
Install NVIDIA Accelerated Graphics Driver for Linux-x86_64 375.26? 
y)es/(n)o/(q)uit: n  #是否显卡驱动包，由于已经安装显卡驱动，选择n
 
Install the CUDA 8.0 Toolkit?
(y)es/(n)o/(q)uit: y #是否安装工具包，选择y
 
Enter Toolkit Location
[ default is /usr/local/cuda-8.0 ]: #工具包安装地址，默认回车即可
 
Do you want to install a symbolic link at /usr/local/cuda?
(y)es/(n)o/(q)uit: y #添加链接**注意这个连接，如果你之前安装过另一个版本的cuda，除非你确定想要用这个新版本的cuda，否则这里就建议选no，因为指定该链接后会将cuda指向这个新的版本**
 
Install the CUDA 8.0 Samples?
(y)es/(n)o/(q)uit: y #安装样例
 
Enter CUDA Samples Location
 [ default is /root ]:  #样例安装地址默认即可
 
# ***安装信息***
Installing the CUDA Toolkit in /usr/local/cuda-8.0 ...
 
Missing recommended library: libXi.so
Missing recommended library: libXmu.so
#注意，这里出现了Missing recommended library错误，
#是因为博主在第一次安装时，没有添加最开始的那条安装相关依赖的指令，
#之后我添加了依赖后，再次安装，就没有Missing错误了
 
Installing the CUDA Samples in /root ...
Copying samples to /root/NVIDIA_CUDA-8.0_Samples now...
Finished copying samples.
 
===========
= Summary =
===========
Driver:   Not Selected
Toolkit:  Installed in /usr/local/cuda-8.0
Samples:  Installed in /root, but missing recommended libraries
 
Please make sure that
 -   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_6388.log   
# ***安装完成***

　　

在Ubuntu18.04中安装CUDA 9.1时，会遇到Error: unsupported compiler: 7.5.0的错误。其原因是Ubuntu18.04的编译器版本过高，因此只需要安装较低版本的gcc、g++即可。

具体解决方法是：

sudo apt install gcc-6 g++-6
sudo ln -s /usr/bin/gcc-6 /usr/local/bin/gcc
sudo ln -s /usr/bin/g++-6 /usr/local/bin/g++

　之后就可以安装cuda9.1了

 

vim ~/.bashrc #修改配置文件（如果你用的是zsh，则需要修改 ~/.zshrc文件）
 
#在文件结尾处添加
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/cuda/lib64
export PATH=$PATH:/usr/local/cuda/bin
export CUDA_HOME=$CUDA_HOME:/usr/local/cuda

　

建立指向cuda9.1的软链接

sudo ln -s /usr/local/cuda-9.1 /usr/local/cuda

　　

查看版本是否为cuda9.1

nvcc -V