Volume change hotkey script

vol_change.sh

#!/bin/bash
# by @travis-g, WTFPL 2 (https://wtfpl2.com/)
function showHelp() { 
echo "Usage: vol_change.sh [up|down INT]
"; exit $1; }
if [[ ! $@ ]] ; then showHelp 1; fi # show help if no opts
i=5 && [[ $2 =~ ^[0-9]+$ ]] && i=$2 # set base increment
case $1 in
  "up") i=$i"+";;
  "down") i=$i"-";;
  "-h"|"help") showHelp 0;;
esac;
amixer set Master $i
# vim: set ts=2 ft=bash