OS：ubuntu 14.04
GPU：GTX 960
之前ubuntu已经安装了cuda7.5，本次通过deb升级到cuda8.0，参考了nvidia的英文安装指导，本人是第一次写文章，只是把自己操作的步骤写下来，有些地方可能有问题，请及时指正，谢谢！
升级之前的准备工作
uname -m && cat /etc/*release # get ubuntu version
uname -r # get ubuntu kernal version
gcc --version # get gcc version
lspci | grep -i nvidia # check nvidia GPU information
cat /proc/driver/nvidia/version # check nvidia GPU driver version
开始升级cuda8.0
download 7fa2af80.pub file fromhttp://developer.download.nvidia.com/compute/cuda/repos/ubuntu1404/x86_64/7fa2af80.pub
cat 7fa2af80.pub | apt-key add -
download cuda-repo-ubuntu1404_8.0.44-1_amd64.deb fromhttp://developer.download.nvidia.com/compute/cuda/repos/ubuntu1404/x86_64/cuda-repo-ubuntu1404_8.0.44-1_amd64.deb
ms5sum cuda-repo-ubuntu1404_8.0.44-1_amd64.deb #check download file if available
sudo dpkg -i cuda-repo-ubuntu1404_8.0.44-1_amd64.deb
sudo apt-get update
sudo apt-get install cuda
sudo vi ~/.bashrc # add PATh and LD_LIBRARY_PATH at the end
export PATH=/usr/local/cuda-8.0/bin:$PATH
export LD_LIBRARY_PATH=/usr/local/cuda-8.0/lib64:$LD_LIBRARY_PATH
Source ~/.bashrc
sudo reboot
dpkg -l | grep nvidia # view all nvidia driver
nvidia-smi #check GPU memory information
cd /usr/local/cuda-8.0/samples
make # compile cuda-8.0 sample files
cd bin/x86_64/linux/release/ # run sample file
./deviceQuery
./bandwidthTest
我在安装完cuda8.0后没有重启ubuntu，运行sample的时候出现错误，could not insert 'nvidia_361_uvm':Invalid argument，检查nvidia driver version还是352.79，没有升级到361.93，而且运行nvidia-smi出现Failed to initialize NVML: Driver/library version mismatch，尝试重新安装361驱动，并sudo apt-get upgrade，然后重启ubuntu后，发现驱动升级到361.93了，运行nvidia-smi也显示正确GPU信息了。重新make sample file，在release目录下运行sample文件deviceQuery运行正常，返回正确值，passed。