Many who are new to Linux have a common grievance.

They have to run commands via terminal then can't close the terminal.

I will show you how to make your life easier!!!

I will use virtual box as my example.

Oracle virtual box has a common issue on many Linux hosts where it will not enumerate USB devices unless you run the Hypervisor as root.

To do such

sudo virtualbox

Then in terminal press

ctrl + z

 You should see similar to this.

^z means ctrl + Z

We then run 

bg

Then we run

disown

Now you can close terminal and Virtualbox will stay open