#!/bin/bash
# Author: 电脑程序爱好者
# Date & Time: 2021-04-26 10:03:59
# Description:
trap break INT # ctrl+c ,break loop
for i in 192.168.1.{1..10}; do
   
    echo "begin to test $i"
    # ping 的参数 -c 3 意思是测试3次，
    if ! ping -c 3 $i &>/dev/null; then

        echo "$i" is off line.
    fi

done