#前提已经可以通过mail或mutt客户端发邮件

1.先安装sendmail来发邮件

  # yum -y install sendmail# /etc/init.d/sendmail start# chkconfig sendmail on

2.再安装邮件客户端

   # yum -y install mutt

2.1 为了更好在邮件中显示，设置mutt客户端发送信息

  # vim /etc/Muttrcset charset="utf-8"           #设置发邮件编码set envelope_from=yesset rfc2047_parameters=yes    #解决附件乱码问题set realname="报警"           #发件人别名set use_from=yes              #指定是否显示别名set from=monitor@test.com     #发送人地址

方法1、通过加失败计数器来判断（误报率低）

#!/bin/bash
DATE=`date +%F" "%H:%M`
IP=/root/monitor/ip.txt     #ip地址表
MAIL=zhenliang369@163.com
for ip in $(cat $IP | sed '/^#/d')
dofor ((i=1;i<=3;i++))doping -c 1 $ip &>/dev/null[ $? -ne 0 ] && let FailCount+=1;done
done
[ -z $FailCount ] && FailCount=0  #当ping都正常时，FailCount值为空，就设置FailCount值为0，用整数比较
if [ $FailCount -eq 2 ];then#echo "$IP ping is failed."echo -e "Date : $DATE\nHost : $ip\nProblem : Ping is failed, Please check ! ! !" | mutt -s "Ping Monitor" $MAIL
fi

#添加任务计划

# crontab -e

*/1 * * * * /root/monitor/ping.sh

done

方法二、通过ping一个包的状态判断（误报率低，建议此方法）

#!/bin/bash
MAIL="baojingtongzhi@163.com huangxiaohong@loongtao.com"
for ip in $(cat ip_list|sed "/^#/d")    #ip_list是当前目录下IP表doping -c 1 $ip &>/dev/null            #三个ping有一个能通，说明服务器正常a=$?sleep 2ping -c 1 $ip &>/dev/nullb=$?sleep 2ping -c 1 $ip &>/dev/nullc=$?sleep 2DATE=$(date +%F" "%H:%M)if [ $a -ne 0 -a $b -ne 0 -a $c -ne 0 ];thenecho -e "Date : $DATE\nHost : $ip\nProblem : Ping is failed." | mail -s "Ping $ip failed From 255.252" $MAIL#else#    echo "$ip ping is successful."fi
done

方法三、通过丢包率来判断是否正常（误报率高）

#!/bin/bash
while true
doDATE=`date +%F" "%H:%M`MAIL="zhenliang369@163.com"for ip in $(cat ip_list|sed "/^#/d")       #ip_list是当前目录下IP表 donum=$(ping -c 2 $ip |grep "100% packet loss" |wc -l)    if [ $num == 1 ];thenecho -e "Date : $DATE\nHost : $i\nProblem : Ping is failed." | mail -s "Ping $i failed From 255.252" $MAILfidone
sleep 30
done