Prepare ubuntu image at http://releases.ubuntu.com/bionic/, download ubuntu-18.04.1-desktop-amd64.iso.

At windows environment, make install media using unetbootin (https://unetbootin.github.io/). Download unetbootin and make install usb stick with ubuntu image.

Keypoints

- Select location for installing bootloader: select usb drive


After Installation

- Install nvidia driver: https://www.linuxbabe.com/ubuntu/install-nvidia-driver-ubuntu-18-04

- Install WiFi driver: https://www.cberner.com/2016/06/08/installing-ubuntu-16-04-macbook-pro-retina-101/

- Enable always performance mode: https://askubuntu.com/questions/1021748/set-cpu-governor-to-performance-in-18-04

Etc.

- https://askubuntu.com/questions/294377/install-ubuntu-without-creating-a-user-account