Maximize all Windows

#!/bin/bash
window_ids=$(wmctrl -l | cut -f1 -d " ")
for window_id in $window_ids
do
  wmctrl -i -r "$window_id" -b toggle,maximized_vert,maximized_horz
  wmctrl -i -r "$window_id" -b add,maximized_vert,maximized_horz
done