Install GNOME-Tweak
$ sudo add-apt-repository universe
$ sudo apt install gnome-tweak-tool
$ gnome-tweaks
https://linuxconfig.org/how-to-install-the-nvidia-drivers-on-ubuntu-18-04-bionic-beaver-linux
Theme: Adapta Icons: Numix-Circle
https://itsfoss.com/install-numix-ubuntu/
https://linuxconfig.org/the-10-best-ubuntu-themes-18-04-bionic-beaver-linux
