How to install Nvidia graphics driver in Ubuntu

First install compilers and make tools by

sudo apt-get install build-essential


Go to this page and download the driver

Set the execution permission necessarily but I always do like this

sudo chmod 777 NVIDIA-Linux-x86-180.51-pkg1.run

press ctrl+alt+f1 and you should be on the pure terminal. If not press that combination until it works and then stop the xserver

sudo /init.d/gdm stop

Then

./NVIDIA-Linux-x86-180.51-pkg1.run

Accept the agreement and say OK for anything asked. After successful installation

sudo /init.d/gdm start