Adjust Linux Mint Mouse Scroll (Normal/Reverse)

Set Scroll Normal

1	echo "pointer = 1 2 3 4 5 6 7 8 9 10 11 12" > ~/.Xmodmap && xmodmap .Xmodmap

Set Scroll Inverted/Reverse

1	echo "pointer = 1 2 3 5 4 6 7 8 9 10 11 12" > ~/.Xmodmap && xmodmap .Xmodmap

By setting scroll reverse, when your fingers goes down, the screen goes down, and vice versa.

I have tested it on LinuxMint, maybe it also works on Ubuntu.