Ubuntu 16.04 Install NVidia Driver (download from nvidia official site)

sudo apt-get update
sudo apt-mark hold libreoffice
sudo apt-get update && sudo apt-get upgrade
uname -r
sudo  echo "blacklist nouveau" >> /etc/modprobe.d/blacklist.conf 
sudo  echo "option nouveau modeset=0" >> /etc/modprobe.d/blacklist.conf
sudo update-initramfs -u
reboot

lsmod | grep nouv
sudo service lightdm stop
cd Downloads/ # the folder to hold NVidia Driver
sudo apt-get purge nvidia*  # make sure remove all nvidia driver

# install some libs
sudo apt install dkms build-essential linux-headers-generic
sudo apt-get install lib32ncurses5 lib32z1

# install driver, in every option, choose yes or continue
sudo ./NVIDIA-Linux-x86_64-430.50.run -no-x-check -no-nouveau-check -no-opengl-files

sudo service lightdm start 
sudo update-initramfs -u
sudo reboot

# after reboot
nvidia-smi