shell编程跨服务器备份文件

#! /bin/bash
function read_dir(){
  IFS=$'\x0A'
    executeDate=`date -d ' -1 day ' +%F" "%T`
    executeDate1=`date -d "${executeDate}" +%s`

  for file in `ls $1 | paste`
  do
    modifyDate=`stat $1"/"$file -c %y`
      currentDate=`date +%F" "%T`
      currentDate1=`date -d "${currentDate}" +%s`
      modifyDate1=`date -d "${modifyDate}" +%s`

    if [ -d $1"/"$file ]
    then
      read_dir $1"/"$file
    elif [ $modifyDate1 -lt $currentDate1 ] && [ $modifyDate1 -gt $executeDate1 ];
    then 
        scp -r "$1""/" "$ip:"$path
    fi
  done
}

path=/root/hu
ip=root@192.168.11.66
read_dir $path $ip