"Shell script" monitors LAN IP online

First, the script function

To determine whether the IP is occupied, the ping rule is considered to be occupied and the results are output to ip_yes.txt and Ip_no.txt, respectively, by means of the ping command detection.

Second, script writing

#!/bin/bash

#Check the network is online

ip_num=192.168.1.

For i in ' SEQ 1 254 '

Do

Ping-c 2 $ip _num$i >/dev/null

If [$? = 0];then

echo "Echo $ip _num$i is yes"

Echo $ip _num$i is yes >> ip_yes.txt

Else

echo "Echo $ip _num$i is no"

Echo Echo $ip _num$i is no >> ip_no.txt

Fi

Done

"Shell script" monitors LAN IP online