Install Crouton and Write Ubuntu Live USB

1 Create an Ubuntu Live USB

You have a couple options for doing this. If you are using windows, a popular choice is Unetbootin: https://unetbootin.github.io/

Most USB drives should work, just make sure you choose Ubuntu x64 from the drop-down menu. Unetbootin should take care of setting everything up for you.

Proceed to step 2