web服务器监控 修复后并发mail提醒

#! /bin/bash
id=`curl -I --connect-timeout 20 |awk '{ print $2;exit}'`
status=no
while [ true ]
do
sleep 10
if [ "${id}" != 200 ] && [ "$status" = ok ] ; then
        echo '什么事都不做'
       sleep 5
     elif [ "${id}" != 200 ]; then
        echo '发邮件通知'
        echo '重启'
        sleep 5
             status=ok
      elif [ "${id}" = 200 ] && [ "$status" = ok ]; then
        echo '发邮件通知'
         sleep 5
              status=no
      elif [ "${id}" = 200 ]; then
        echo '正常'
fi
id=`curl -I --connect-timeout 20 |awk '{ print $2;exit}'`