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[DOCS] Update Installation Guide - GPU steps (#2308) 

* Initial commit

* fixing lists

* Update installing-openvino-linux.md

* Get rid of the note

* Added the scrrenshot

* Update installing-openvino-linux.md

* fixes
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docs/install_guides/installing-openvino-linux.md
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@ -320,17 +320,24 @@ cd /opt/intel/openvino/install_dependencies/
```sh
sudo -E su
```
3. Install the **Intel® Graphics Compute Runtime for OpenCL™** driver components required to use the GPU plugin and write custom layers for Intel® Integrated Graphics:
3. Install the **Intel® Graphics Compute Runtime for OpenCL™** driver components required to use the GPU plugin and write custom layers for Intel® Integrated Graphics. Run the installation script:
```sh
./install_NEO_OCL_driver.sh
```
You may see the following command line output:
- Add OpenCL user to video group
- Run script to install the 4.14 kernel script
Ignore those suggestions and continue.
The drivers are not included in the package and the script downloads them. Make sure you have the
internet connection for this step.
The script compares the driver version on the system to the current version.
If the driver version on the system is higher or equal to the current version, the script does
not install a new driver.
If the version of the driver is lower than the current version, the script uninstalls the lower
and installs the current version with your permission:
![](../img/NEO_check_agreement.png)
Higher hardware versions require a higher driver version, namely 20.35 instead of 19.41.
If the script fails to uninstall the driver, uninstall it manually.
During the script execution, you may see the following command line output:
- Add OpenCL user to video group
Ignore this suggestion and continue.
4. **Optional** Install header files to allow compiling a new code. You can find the header files at [Khronos OpenCL™ API Headers](https://github.com/KhronosGroup/OpenCL-Headers.git).
## <a name="additional-NCS-steps"></a>Steps for Intel® Neural Compute Stick 2