摘要：
学习shell script，碰到如下问题#!/bin/bash# Program:#This program shows the user's choice# History:# 2005/08/25VBirdFirst releasePATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/binexport PATHread -p "Please input (Y/N): " yn[ "$yn" == "Y" -o "$yn" 阅读全文