在Ubuntu 16.04 上安装CUDA 9.0遇到的一个问题以及解决

在Ubuntu16.04的环境下，安装CUDA 9.0，使用时官方的run文件。

然后遇到的主要的问题如下：

Installing the CUDA Toolkit in /usr/local/cuda-9.0 ...

Missing recommended library: libGL.so

Installing the CUDA Samples in /home/dl ...
Copying samples to /home/dl/NVIDIA_CUDA-9.0_Samples now...
Finished copying samples.

===========

# = Summary =

Driver:   Not Selected
Toolkit:  Installed in /usr/local/cuda-9.0
Samples:  Installed in /home/dl, but missing recommended libraries

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

提示中提到的主要问题：

Missing recommended library: libGL.so

根据这个问题，在网上解决了好久，有人说如下解决：

sudo apt-get install g++ freeglut3-dev build-essential libx11-dev libxmu-dev libxi-dev libglu1-mesa libglu1-mesa-dev

没有效果。

然后我检索了一下：

sudo find / -name 'libGL*'

得到结果如下：

dl@dl-MS-7B18:/media/dl/down/download$ sudo find / -name 'libGL*'
/usr/local/cuda-9.0/samples/common/lib/linux/x86_64/libGLEW.a
/usr/local/cuda-9.0/samples/common/lib/linux/aarch64/libGLEW.a
/usr/local/cuda-9.0/samples/common/lib/linux/armv7l/libGLEW.a
/usr/lib/x86_64-linux-gnu/libGLX_nvidia.so.418.56
/usr/lib/x86_64-linux-gnu/libGLX.so
/usr/lib/x86_64-linux-gnu/libGLU.so.1.3.1
/usr/lib/x86_64-linux-gnu/libGLEW.so.1.13.0
/usr/lib/x86_64-linux-gnu/libGL.so.1.7.0
/usr/lib/x86_64-linux-gnu/libGL.so
/usr/lib/x86_64-linux-gnu/libGLESv1_CM.so.1.2.0
/usr/lib/x86_64-linux-gnu/mesa/libGL.so
/usr/lib/x86_64-linux-gnu/libGLEWmx.so.1.13
/usr/lib/x86_64-linux-gnu/libGLESv1_CM_nvidia.so.1
/usr/lib/x86_64-linux-gnu/libGLU.so
/usr/lib/x86_64-linux-gnu/libGLX_nvidia.so.0
/usr/lib/x86_64-linux-gnu/libGLESv1_CM_nvidia.so.418.56
/usr/lib/x86_64-linux-gnu/libGL.la
/usr/lib/x86_64-linux-gnu/libGLU.so.1
/usr/lib/x86_64-linux-gnu/libGL.so.1
/usr/lib/x86_64-linux-gnu/libGLESv2.so
/usr/lib/x86_64-linux-gnu/libGLX.so.0
/usr/lib/x86_64-linux-gnu/libGLEW.so.1.13
/usr/lib/x86_64-linux-gnu/libGLESv2.so.2.1.0
/usr/lib/x86_64-linux-gnu/libGLdispatch.so.0
/usr/lib/x86_64-linux-gnu/libGLESv2_nvidia.so.2
/usr/lib/x86_64-linux-gnu/libGLEWmx.so.1.13.0
/usr/lib/x86_64-linux-gnu/libGLU.a
/usr/lib/x86_64-linux-gnu/libGLESv2_nvidia.so.418.56
/usr/lib/x86_64-linux-gnu/libGLESv1_CM.so
/usr/lib/x86_64-linux-gnu/libGLESv1_CM.so.1
/usr/lib/x86_64-linux-gnu/libGLX_indirect.so.0
/usr/lib/x86_64-linux-gnu/libGLESv2.so.2
/usr/lib/libGL.so.1
/home/dl/NVIDIA_CUDA-9.0_Samples/common/lib/linux/x86_64/libGLEW.a
/home/dl/NVIDIA_CUDA-9.0_Samples/common/lib/linux/aarch64/libGLEW.a
/home/dl/NVIDIA_CUDA-9.0_Samples/common/lib/linux/armv7l/libGLEW.a

发现系统中是存在这个文件的：

/usr/lib/libGL.so.1

于是我建立软连接：

sudo ln -s /usr/bin/libGL.so.1 /usr/bin/libGL.so

然后，Evevring thing is OK～

记录下来，同样遭遇的你少走弯路。