Guest Mode creates a temporary environment where the user cannot save things locally on the computer, similar to Deep Freeze for Windows. Here are some helpful links to create and setup Guest Mode for your lab computers: https://help.ubuntu.com/community/CustomizeGuestSession https://andresilva.me/articles/configuring-a-guest-session-on-linux-mint/ https://ihaveapc.com/2019/05/how-to-configure-linux-mint-to-allow-guest-only-access/ https://www.youtube.com/watch?v=XC0JonvTTOk