nc命令检查端口是否存活

#!/bin/bash

for IP in `cat /log/ip_ubt.txt`

do

IPP="$IP 22"

/bin/nc -v -w 5 -z $IPP > /dev/null 2>&1

if [ $? -eq 0 ];then

echo $IPP:ok >> /log/ssh_22_ok.txt

echo $IP >> /log/ssh_22.txt

fi

done

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nc命令检查端口是否存活脚本