目录

本机环境

• ubuntu20.04(GTX 2080ti)
• cuda10.02
• 使用的cuda安装包cuda_10.2.89_440.33.01_linux.run

问题产生的过程

前面就不论述了，下载，安装。这里不安装cuda安装包中自带的显卡驱动。
这里报了错。

Installation failed. See log at /var/log/cuda-installer.log for details.

具如何查看log中ERROR的内容呢？

$ cat /var/log/cuda-installer.log | grep [ERROR] > a.txt

a.txt文件中的具体错误内容如下：

[ERROR]: Unable to determine libdir
[ERROR]: Unable to determine libdir
...
[ERROR]: boost::filesystem::remove: Directory not empty: "/var/log/nvidia/.uninstallManifests/"
[ERROR]: boost::filesystem::remove: Directory not empty: "/var/log/nvidia/.uninstallManifests/"
[ERROR]: boost::filesystem::remove: Directory not empty: "/var/log/nvidia/.uninstallManifests/"
[ERROR]: boost::filesystem::remove: Directory not empty: "/var/log/nvidia/.uninstallManifests/"
[ERROR]: boost::filesystem::remove: Directory not empty: "/var/log/nvidia/.uninstallManifests/"
[ERROR]: boost::filesystem::remove: Directory not empty: "/var/log/nvidia/.uninstallManifests/"
[ERROR]: boost::filesystem::remove: Directory not empty: "/var/log/nvidia/.uninstallManifests/"
[ERROR]: boost::filesystem::remove: Directory not empty: "/var/log/nvidia/.uninstallManifests/"
[ERROR]: boost::filesystem::remove: Directory not empty: "/var/log/nvidia/.uninstallManifests/CUDA_Toolkit_10.2-components/CUDA_Tools_10.2-components/CUDA_Command_Line_Tools_10.2-components/"

解决方案

参考了这个回答求助！！ubuntu20.04安装CUDA10.2失败！（事实证明搜索也是有技巧的。搜[ERROR]: boost::filesystem::remove: Directory not empty: "/var/log/nvidia/.uninstallManifests/"这个就有相关结果了。）
将指令改为sudo ./cuda_10.2.89_440.33.01_linux.run --librarypath=/usr/local/cuda-10.2，重新运行。操作和上面的相同。

xuyc@xuyc-Super-Server:~/Desktop$ sudo ./cuda_10.2.89_440.33.01_linux.run  --librarypath=/usr/local/cuda-10.2
===========
= Summary =
===========

Driver:   Not Selected
Toolkit:  Installed in /usr/local/cuda-10.2/
Samples:  Installed in /home/xuyc/, but missing recommended libraries

Please make sure that
 -   PATH includes /usr/local/cuda-10.2/bin
 -   LD_LIBRARY_PATH includes /usr/local/cuda-10.2/lib64, or, add /usr/local/cuda-10.2/lib64 to /etc/ld.so.conf and run ldconfig as root

To uninstall the CUDA Toolkit, run cuda-uninstaller in /usr/local/cuda-10.2/bin

Please see CUDA_Installation_Guide_Linux.pdf in /usr/local/cuda-10.2/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 440.00 is required for CUDA 10.2 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 /var/log/cuda-installer.log

测试cuda是否安装成功

接下来配置环境变量。
输入gedit ~/.bashrc命令打开文件，在文件结尾输入以下语句，保存。

export PATH=/usr/local/cuda-10.2/bin${PATH:+:${PATH}}
export LD_LIBRARY_PATH=/usr/local/cuda-10.2/lib64${LD_LIBRARY_PATH:+:${LD_LIBRARY_PATH}}

更新环境变量配置

source ~/.bashrc

然后使用nvcc -V测试以下是否能检测到Cuda，出现以下的信息就是成功啦。