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How to detect server network status in Linux

May 24, 2017 pm 02:12 PM
linux

这篇文章主要介绍了Linux 检测服务器是否连接着网络的相关资料,需要的朋友可以参考下

Linux 检测服务器是否连接着网络

摘要: 每隔5分钟检测一次服务器是否连接着网络,如果三次检测都没有网络?则自动关机! 主要使用场景: 由于自己有一台服务器放在偏远的老家,有可能会遇到停电导致断网的问题,并且停电后UPS使用时间也有限制, 因此设计此脚本为了解决停电的时候服务器突然断电引起的各种问题,当停电后网络也就不通了,此时需要自动关闭服务器. 当然,来电后需要手动启动服务器!!!


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#!/bin/bash

 

# 检测服务器是否连接着网络,如果网络不通 则 3次后 关机

# crontab -e

# */5 * * * * ./check.sh

 

echo "Starting test network was clear..."

 

if test -e ./checkInfo

 then

 echo "CheckInfo File Exist..."

else

 cat /dev/null > ./checkInfo

fi

 

last_res=`head -1 ./checkInfo`

 

checkInternet(){

 ping_res=1

 

 for url in "8.8.8.8" "61.139.2.69" "114.114.114.114" "168.95.1.1" "223.5.5.5" "180.76.76.76"

 do

 echo "PING ${url}"

 

 ping=`ping -c 3 ${url}|awk 'NR==7 {print $4}'`

 

 if [ ${ping} -eq 0 ]

  then

  ping_res=1

  else

  ping_res=2

 fi

 

 if [ ${ping_res} -eq 2 ]

  then

  break

 fi

 done

 

 return ${ping_res}

}

 

checkInternet

 

result="$?"

 

if [ ${result} -eq 1 ]

 then

 if [ "${last_res}" = "1" ]

  then

  echo "2" > ./checkInfo

 elif [ "${last_res}" = "2" ]

  then

  cat /dev/null > ./checkInfo

  init 0

  else

  echo "1" > ./checkInfo

 fi

 else

 cat /dev/null > ./checkInfo

fi

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