linux下定时监控tcp连接数的方法和步骤

1.编写监控脚本 tcp_statistics.sh

echo `date +"%F %H:%M:%S"` "TCP-ALL" `netstat -anotp |awk '/tcp/ {print $6}'|wc -l` >> tcp_count.txt

echo `date +"%F %H:%M:%S"` "TCP-LISTEN" `netstat -anotp|grep "LISTEN" |wc -l` >>tcp_count.txt

echo `date +"%F %H:%M:%S"` "TCP-ESTABLISHED" `netstat -anotp | grep "ESTABLISHED" |wc -l ` >> tcp_count.txt

echo `date +"%F %H:%M:%S"` "TCP_TIME_WAIT" `netstat -anotp |grep "TIME_WAIT" |wc -l  ` >> tcp_count.txt

echo `date +"%F %H:%M:%S"` "TCP_CLOSE_WAIT" `netstat -anotp |grep "CLOSE_WAIT" |wc -l` >> tcp_count.txt

 

2.更改文件权限

chmod 777 tcp_statistics.sh

 

3.加入定时任务

crontab -e

*/1 * * * * sh /root/tcp_statistics.sh

 

4.重启定时服务

service crond restart

 

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