How to increase mouse wheel speed in ubuntu 16.04

Start Terminal (Ctrl+Alt+T) run this command to install imwheel sudo apt-get install imwheel if this command no works….. try, sudo apt install imwheel again run a command……… gedit ~/.imwheelrc gedit has opened, paste this text in gedit box….. ".*" None, Up, Button4, 3 None, Down, Button5, 3 Control_L, Up, Control_L|Button4 Control_L, Down, Control_L|Button5 Shift_L, Up, Shift_L|Button4 Shift_L, Down, Shift_L|Button5 Now run this command... killall imwheel && imwheel -b "4 5" add imwheel in start up apps, follow me.................. imwheel -b "4 5"