This project is just an introductory example of how we can start thinking about creating a module for the Linux Kernel.
Did this on Pop!_OS 20.04
This will ask for sudo permissions as these are very low level actions.
Inside the src folder run the make in command, it will build the module directory and then insert it into the Kernel,
at the end you will be able to see the message "Hello from Kernel!" just as it is set in the code of the hello_world_LKM.c file,
in this case, it was the action that the module performed when it was inserted in the Kernel.
Once you've inserted the module, it's time to remove it, just run the make out command, you will see a message saying "Goodbye from Kernel!",
this is the action that the module performed at the moment that was removed from the Kernel
and then at the end it cleans the directory with the files that were created for the module.