shell脚本实现判断远程服务器端口号是否打开(telnet)

addr=www.hh.com; #或者ip地址

port=80;

tmpfile=/tmp/tel.tmp;

echo -e "\n" |telnet $addr $port 1>$tmpfile 2>/dev/null; #一般输出写入文件，错误输出不记录、不显示

num=`cat $tmpfile | grep Connected | wc -l`;

if [[ $num -ne 0 ];then

echo "telnet $addr $port ok";

else

echo "telnet $addr $port failed";

fi

exit