How to convert a FASTA file to an Arlequin file

This tutorial shows you how to make a file for use with the population genetic software Arlequin when starting with a file of DNA sequence data in FASTA format.

This tutorial assumes you are using Ubuntu Linux version 20.04 as your operating system. If you do not have a computer running Ubuntu, fear not. You can install Ubuntu as a virtual machine within your current operating system. It is all free.
The instructions for Windows computers are here:
youtube.com/watch?v=diIW3fgewhI
The instructions for Mac computers are here (from 0:00 to 5:37):
youtu.be/f6oU_JzrALk

This tutorial utilizes RStudio:
rstudio.com/
(Rstudio also requires R: r-project.org/)

But you can just use my pre-configured Ubuntu Linux virtual machine! Read more below.

Also, FYI:
I have made a Linux virtual machine that is pre-configured with population genetics and ecological niche modeling programs. I have made videos explaining how to hook up this virtual machine within your Mac or Windows computer, so that you can start using the pre-configured software without having to install any of them (and even without having to install Ubuntu Linux!).

Windows: youtube.com/watch?v=-K8byTOpTY4
Mac: youtu.be/yGYjI2sCqIM