sh 测试网段在线主机

yum install nmap

nmap -sP  192.168.21.1/24 查看网段在线主机

grep -vwf file1 file2 文件内容比较

#!/bin/bash
#
day=`date +%F`
oldlog=/root/showlongin/amazon-login2016.txt
touch /root/showlongin/$day
nmap -sP 192.168.21.1/ |grep -o "192.*" > /root/showlongin/$day

if grep -vwf $day $oldlog &> /dev/null;then
    echo -e "\033[31m`grep -vwf $day $oldlog`\033[0m, IP is shutdown!!"
else
    echo -e " \033[32mIt Perfect!!\033[0m"
fi
[root@beary showlongin]# ./showlongin.sh
192.168.21.52, IP is shutdown!!

测试在线主机 II

适用于多台监控多台windows服务器多网卡配置

windows 运行一个ping 外网脚本，判断是否断网。正常则在本地log日志新增OK，已断开则向监控服务器发送断开日志，IP，down

Linux 安装环境：

smb共享 http://blog.chinaunix.net/uid-23069658-id-3142052.html

linux -msmtp +mutt 邮件通告： http://blog.slogra.com/post-418.html

　　　　　　　　　　　　　　　　 http://storysky.blog.51cto.com/628458/631267/

windows ping脚本：

 @echo off
 :abc
 if "%1"=="hide" goto CmdBegin
 start mshta vbscript:createobject("wscript.shell").run("""%~0"" hide",)(window.close)&&exit
 :CmdBegin                                         ##转后台运行

 for /f "tokens=16" %%i in ('ipconfig ^| find /i "192.168.1"') do set ip=%%i                                ## 获取内网IP
 @ ping -n  www.baidu.com >nul
 @ if %errorlevel%== echo %ip%_ADSL,down_%date:~,%_%time:~,% >>\\192.168.1.10\sabc\showlogin.txt  ##判定，断网则向共享发送日志
 @ if %errorlevel%== echo %ip%_network,OK_%date:~,%_%time:~,% >>c:\netlog.txt        ##成功，本地生成日志

 choice /t  /d y /n >nul        #休眠时间
 goto abc                           #循环测试

Linux 监控脚本

 cat showlogin.sh

 1 #!/bin/bash
 #
 SAMPLE=/sabc/samplelogin.txt
 NOWLOG=/sabc/showlogin.txt
 while :;do
     if grep -vwf $SAMPLE $NOWLOG &> /dev/null;then  #文件内容对比判断
     DOWN=`grep -vwf $SAMPLE $NOWLOG`
     IPA=`grep -vwf $SAMPLE $NOWLOG | awk -F_ '{print $1}'`
     echo "$DOWN" | mutt -s "warning $IPA wan-down!!" [e-mail]                  ##有生成新内容则截取，发送邮件
     sleep
     grep -vwf $SAMPLE $NOWLOG >> $SAMPLE   #将新增内容添加到样本文件，以做下次判断
     fi
     sleep
 done

linux: 脚本后台运行

# ./showlogin.sh &

加入开机启动项：

[root@shlogin share]# cat /etc/rc.d/rc.local
#!/bin/sh
#
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don't
# want to do the full Sys V style init stuff.

touch /var/lock/subsys/local
/share/showlogin.sh &     ##直接新增一条记录