#!/bin/bash# 遍历192.168.3.1到192.168.3.254
for i in {1..254}
doip="192.168.3.$i"# 对每个IP地址进行三次ping操作if ping -c 3 -W 1 $ip > /dev/null 2>&1thenecho "$ip: yes"fi
done

$ sh test.sh
192.168.3.1: yes
192.168.3.95: yes
192.168.3.96: yes
192.168.3.98: yes
192.168.3.111: yes
192.168.3.122: yes