# Installing Nvidia Graphics Driver and Cuda on Ubuntu

### Remove any previously installed Nvidia drivers
```
$ sudo apt-get remove --purge nvidia-*
$ sudo apt-get autoremove
$ sudo apt-get autoclean
```

**You can choose to install CUDA drivers from `.deb` file or `.run` file**

## 1. Installing from `.run` file (Recommended)
---

#### Download **CUDA 8.0 `.run` file (local) for Ubuntu** - [Download Page](https://developer.nvidia.com/cuda-downloads)

> eg: Run file (local) for Ubuntu 14.04 (~1.4G)

```
$ wget https://developer.nvidia.com/compute/cuda/8.0/Prod2/local_installers/cuda_8.0.61_375.26_linux-run`
$ chmod 755 cuda_8.0.61_375.26_linux-run
```

#### Installing the runfile

Login to the Virtual Console (not the Terminal) by pressing `Ctrl + Alt + F1` - Enter your `username` and `password`

#### Disable `lightdm` and other settings

```
$ sudo /etc/init.d/lightdm stop
$ sudo init 3 
$ sudo apt-get install build-essential
$ echo blacklist nouveau option nouveau modeset=0 |sudo tee -a /etc/modprobe.d/blacklist-nouveau.conf 
$ sudo update-initramfs -u
```

#### Start the runfile
```
$ sudo ./cuda_8.0.61_375.26_linux-run
...
(Scroll through the Terms and Conditions by Pressing Ctrl+D
...
Do you want to Install Nvidia Integrated Drivers? (yes)
Do you want to Install OpenGL? (yes)

**NOTE: If *lightdm* fails to display after login, Restart the whole process by opting (no) for OpenGL**

...
Install X11 config file? (no)
Install cuda? (yes)
```

#### Remove old X11 config file
```
$ sudo rm /etc/X11/xorg.conf
```
(No need to create new X11 file as during restart, `lightdm` will create a new file with new drivers configuration)

#### Reboot the system
```
$ sudo reboot
```

After reboot, login to the system and run `nvidia-settings` to ensure the drivers are installed
```
$ nvidia-settings
...
$ nvidia-smi
...
```

## 2. Installing from `.deb` file
---

#### Download **CUDA 8.0 `.deb` file (local) for Ubuntu** - [Download Page](https://developer.nvidia.com/cuda-downloads)

> eg: Deb file (local) for Ubuntu 14.04 (~1.9G)

```
$ wget https://developer.nvidia.com/compute/cuda/8.0/Prod2/local_installers/cuda-repo-ubuntu1404-8-0-local-ga2_8.0.61-1_amd64-deb`
```

#### Run the following commands
```
$ 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
```

#### Reboot the system
```
$ sudo reboot
```

After reboot, login to the system and run `nvidia-settings` to ensure the drivers are installed
```
$ nvidia-settings
...
$ nvidia-smi
...
```

**Comment if there any issues**