Home > Article > Operation and Maintenance > Code example of how Linux detects whether the server is connected to the network
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!!!
#!/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
The above is the detailed content of Code example of how Linux detects whether the server is connected to the network. For more information, please follow other related articles on the PHP Chinese website!