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#!/bin/bash#1-2-9
#判断命令行是否带有两个文件名的参数
if [ "$1" = "" ] || [ "$2" = "" ];then
echo "Please enter file name"
exit 1
fi
#判断目标文件是否存在
if [ -e $2 ];then
echo "The file already exists "
until [ ! -f $2 ] #监视该文件是否被删除
do sleep 1
done
echo "The file have been deleted"
fi
#执行源文件移动为目标文件的命令
if [ ! ` mv $1 $2` ];then
echo "mv successfully"
else
echo "mv error"
fi
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