#!/bin/bash# case-cmd.sh: 使用命令替換來產生"case"變量.case $( arch ) in   # "arch" 返回機器體系的類型.                    # 等價于 'uname -m' ...i386 ) echo "80386-based machine";;i486 ) echo "80486-based machine";;i586 ) echo "Pentium-based machine";;i686 ) echo "Pentium2+-based machine";;*    ) echo "Other type of machine";;esacexit 0