#!/bin/bash

start_ip="10.10.43.100"
end_ip="10.10.43.253"

echo "마지막 수행 시간 : $(date +%Y-%m-%d-%r)<br>" > README.md
echo "|주소         |사용 여부         |" >> README.md
echo "|------|------|" >> README.md

for ((i=${start_ip##*.}; i<=${end_ip##*.}; i++)); do
    ip="${start_ip%.*}.${i}"
    if ping -c 1 -W 1 "$ip" >/dev/null 2>&1; then
        echo "|$ip|<span style="color:red">사용중</spen>|" >> README.md
    else
        echo "|$ip|<span style="color:green">사용가능|</spen>" >> README.md
    fi
    echo "${i} 체크 완료"
done