官方网站下载：CUDA Toolkit 8.0。下载网址为：https://developer.nvidia.com/cuda-downloads 选择linux，86_64，Ubuntu，14.04，deb[local]
安装CUDA之前更新源列表如下：deb http://debian.ustc.edu.cn/ubuntu/ trusty main multiverse restricted universe
deb http://debian.ustc.edu.cn/ubuntu/ trusty-backports main multiverse restricted universe
deb http://debian.ustc.edu.cn/ubuntu/ trusty-proposed main multiverse restricted universe
deb http://debian.ustc.edu.cn/ubuntu/ trusty-security main multiverse restricted universe
deb http://debian.ustc.edu.cn/ubuntu/ trusty-updates main multiverse restricted universe
deb-src http://debian.ustc.edu.cn/ubuntu/ trusty main multiverse restricted universe
deb-src http://debian.ustc.edu.cn/ubuntu/ trusty-backports main multiverse restricted universe
deb-src http://debian.ustc.edu.cn/ubuntu/ trusty-proposed main multiverse restricted universe
deb-src http://debian.ustc.edu.cn/ubuntu/ trusty-security main multiverse restricted universe
deb-src http://debian.ustc.edu.cn/ubuntu/ trusty-updates main multiverse restricted universe
然后执行如下指令：
$ sudo dpkg -i cuda-repo-ubuntu1404-8-0-local-ga2_8.0.61-1_amd64.deb
$ sudo apt-get update
$ sudo apt-get install cuda
安装不成功一般就是更新源的问题，找网上的更新源添加即可，安装成功这时在/usr/local目录下产生一个cuda安装的路径叫"cuda-8.0"
安装成功之后必须重新启动服务器
添加cuda到环境变量：
执行sudo vim /etc/profile
export PATH=/usr/local/cuda-8.0/bin:$PATH
export LD_LIBRARY_PATH=/usr/local/cuda-8.0/lib64:$LD_LIBRARY_PATH
接着执行 source /etc/profile 使其立即生效执行sudo vim ~/.bashrc，在最后面，64位的话粘贴以下内容：
export PATH=/usr/local/cuda-8.0/bin:$PATH
export LD_LIBRARY_PATH=/usr/local/cuda-8.0/lib64:$LD_LIBRARY_PATH
接着执行 source ~/.bashrc 使其立即生效 下面查询
nvcc -V
可见如下结果
nvcc: NVIDIA (R)Cuda compiler driverCopyright (c) 2005-2015 NVIDIA CorporationBuilt on Tue_Aug_11_14:27:32_CDT_2015Cuda compilation tools,release 7.5,V7.5.17
进入/usr/local/cuda/samples，执行下面的命令来build samples，
sudo make all -j4
全部编译完成后，进入 samples/bin/x86_64/linux/release，运行deviceQuery，
./deviceQuery如果出现显卡信息，则驱动及显卡安装成功
