What is the best way to install Linux for a practical course on it?

Question

linux

The task is to conduct practical classes on Linux for employees. I have a PC with Ubuntu installed. How to make it so that after the group has completed the course, return Linux to its full original state? Thank you!

Answer 1

Install pure Linux in virtual box, copy the files of the virtual system somewhere, after working with Linux in virtual box, demolish the used nafig and take a previously saved copy

Answer 2

Snapshots.
As an option - the virtual machine is deployed in full screen. Here you choose the one that you like, make the necessary ubuntu in it. You make a snapshot of the virtual machine and that's it. Revert to a snapshot as needed. Which virtual machine to take - the choice is yours. As far as I remember, VirtualBox, and KVM, and vmware, and Hyper-V can both snapshot and expand to full screen.
I feel that on the "iron" ubunt it can be done, but I don't know how. Perhaps xen, although this is already, in some way, also a virtual machine.
Another thought came to mind to put ubuntu on any file system that supports snapshots, but IMHO the option with a virtual machine will require minimal mental effort and mana readings. (Though not the best in my opinion)

Answer 3

I haven't tried it myself, but I heard about timeshift. Makes backup copies of the system and restores when a specific copy is needed:
https://github.com/teejee2008/timeshift
It comes with linux mint out of the box, but of course it's not a problem to install)

Answer 4

If the training program does not focus on working with hardware, then the easiest way is to use a virtual machine, which is loaded from a snapshot every time. In VB, this is generally done wonderfully - this is how I write game passages :)

Answer 5

At the expense of a virtual machine, I know this option, and it is even possible to cut virtual boxes on the vmvare server. But I wanted the students to feel exactly the hardware (boot process, boot interruption, grub, etc.)
In my fantasies, it should be like this, somewhere on a hidden partition a complete backup of the configured system is stored after the group has completed the course, you roll back. I read the variant with the help of LVM snapshots, how do you say it is worth trying it out? Or to consider a variant with dd?