扫描24位网段所有ip，判断可用性

#!/bin/bash
function checkPortStatus(){
    port=$1
    nmap ${line} -p ${port} | grep open > /dev/null
    if [[ $? -eq 0 ]];then
        echo ${line} "${port} is open"
    else
        echo ${line} "${port} is close"
    fi
}

port=$1
if [[ -z ${port} ]];then
    exit 1
fi

cat /tmp/ping-all | grep online | awk '{print $1}'| while read line
do
    checkPortStatus ${port}
done