for方法：
[14:20:07 root@centos8 ~]#cat ping_for.sh
#!/bin/bash
#================================================================
# Copyright (C) 2021 IEucd Inc. All rights reserved.
#
# 文件名称：ping_for.sh
# 创 建 者：TanLiang
# 创建日期：2021年10月17日
# 描 述：This is a test file
#
#================================================================
#!/bin/bash
NETID=192.168.0
for ip in {1..254};do
{
if /bin/ping -c1 -w1 $NETID.$ip >/dev/null;then
echo "ping $NETID.$ip is success!"
else
echo "ping $NETID.$ip is fail!"
fi
}&
done
wait
while方法：
[14:43:33 root@centos8 ~]#cat ping_while.sh
#!/bin/bash
#================================================================
# Copyright (C) 2021 IEucd Inc. All rights reserved.
#
# 文件名称：ping_for.sh
# 创 建 者：TanLiang
# 创建日期：2021年10月17日
# 描 述：This is a test file
#
#================================================================
#!/bin/bash
NETID=192.168.0
declare -i ip=1
while [ $ip -lt 255 ];do
{
/bin/ping -c1 -w1 $NETID.$ip &>/dev/null
if [ $? -eq 0 ];then
echo "ping $NETID.$ip is success!"
else
echo "ping $NETID.$ip is fail!"
fi
}&
let ip++
done
wait
[14:46:59 root@centos8 ~]#bash ping_for.sh |sort -n -t"." -k 4