I am setting up Ubuntu in Virtualbox to test tutorials that I'm making. Each time I boot Ubuntu I need a fresh image, without any saved changes that were previously made (Saved documents or installed programs should not persist).
How can I ensure that no changes persist?
Get the VM into the state you want it in, then create a snapshot. Restore to that snapshot just before each time you start the VM. You may be able to automate this with the vboxmanage snapshot ... command: https://www.virtualbox.org/manual/ch08.html. It appears to have a restore subcommand, so you may be able script the combined restore + start by also using the startvm subcommand.
