Linux screens are great for running background tasks and are especially helpful when running a long process on a remote server due to SSH timelimits.
Start a new screen
screen
(Run commands for tasks)
Detach from a screen
[CTL] + [A], [D]
List Screens
screen -ls
Reattach to screen (id)
screen -r 31620
Kill a screen while attached
[CTL] + [A], [D]
Kill a screen while not attached
screen -X -S 31620 kill