批量检测网站是否异常并邮件通知

#!/bin/bash
URL_LIST="www.baidu.com www.ctnrs.com www.der-matech.net.cn www.der-matech.com.cn www.der-matech.cn www.der-matech.top www.der-matech.org"
for URL in $URL_LIST; do
    FAIL_COUNT=0
    for ((i=1;i<=3;i++)); do
        HTTP_CODE=$(curl -o /dev/null --connect-timeout 3 -s -w "%{http_code}" $URL)
        if [ $HTTP_CODE -eq 200 ]; then
            echo "$URL OK"
            break
        else
            echo "$URL retry $FAIL_COUNT"
            let FAIL_COUNT++
        fi
    done
   if [ $FAIL_COUNT -eq 3 ]; then
        echo "Warning: $URL Access failure!"
        echo "网站$URL坏掉，请及时处理" | mail -s "$URL网站高危" 1794748404@qq.com
    fi
done