#!/bin/bash#判斷命令行是否代帶有兩個(gè)文件名的參數(shù)if [ "$1" = "" ] || [ "$2" = "" ]then    echo "Please enter file name"    exit 1fi#判斷目標(biāo)文件是否存在if [ -e $2 ]then	echo "The file already exists"	until [ ! -f $2 ] #監(jiān)視該文件是否被刪除	do        sleep 1    done	echo "The file have been deleted"fi#執(zhí)行源文件移動為目標(biāo)文件的命令if [ ! `mv $1 $2` ]then    echo "mv sucessful"else    echo "mv error"fi