#!/bin/bash max=$(amixer get Master | grep Limits | cut -f7 -d' ') step=$(( ($max+19)/20 )) if [[ $# -eq 1 ]]; then case $1 in "up") amixer set Master $step+;; "down") amixer set Master $step-;; "toggle") amixer set Master toggle;; *) echo "Invalid option";; esac fi
