Fedora Desktop and Ubuntu Server

Hi,  I'm teaching a class in Linux.  Scary thought!  The students will begin using the class with Fedora Desktop and finish the class using Ubuntu Server.  Both will be individual VMWare VMs for each student, where the VMs will reside on their external drives that they bring with them from class to class.  I need to have them type a command that will save the terminal commands they type for easiest retrieval on their external drive folder for the class.  Is there a good way to do this?