nvidia-smi command not found Ubuntu 16.04

issue:     nvidia-smi command not found Ubuntu 16.04

https://askubuntu.com/questions/902636/nvidia-smi-command-not-found-ubuntu-16-04

reason:  The solution that worked for me was to disable secure boot when rebooting after installing the NVIDIA drivers.

原文地址：https://blog.csdn.net/stories_untold/article/details/78521925，转载主要方便随时查阅，如有版权要求，请及时联系。

Right way to set nvidia driver:

. 删除之前安装的nvidia驱动，运行 ：

sudo apt-get purge nvidia-*

2. 添加第三方驱动源，运行

sudo add-apt-repository ppa:graphics-drivers/ppa

3.更新软件源：

sudo apt-get update

4.安装：

sudo apt-get install nvidia-375
sudo apt-get update
sudo apt-get upgrade

可能还会报以下的错误：

NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running.

这个时候，可以重启一下，本人也是重启后所有正常的，具体原因不知。

成功输出为：

whsyxt@whsyxt:~$ nvidia-smi
Thu Oct 19 17:40:57 2017
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 375.82                 Driver Version: 375.82                    |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|===============================+======================+======================|
|   0  GeForce GTX 1070    Off  | 0000:01:00.0      On |                  N/A |
| 47%   35C    P8    11W / 160W |    277MiB /  8110MiB |      0%      Default |
+-------------------------------+----------------------+----------------------+

+-----------------------------------------------------------------------------+
| Processes:                                                       GPU Memory |
|  GPU       PID  Type  Process name                               Usage      |
|=============================================================================|
|    0       950    G   /usr/lib/xorg/Xorg                             149MiB |
|    0      1771    G   compiz                                         125MiB |
+-----------------------------------------------------------------------------+

参考文献

[1].ubuntu怎么安装nvidia 375驱动.https://zhidao.baidu.com/question/1115001642352097179.html

[2].There is wrong about running the command nvidia-smi.https://github.com/jcjohnson/neural-style/issues/335

https://askubuntu.com/questions/927199/nvidia-smi-has-failed-because-it-couldnt-communicate-with-the-nvidia-driver-ma

[3].NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running.