shell监控网卡流量

最近出现了由于网络阻塞访问库出现问题现象，现纪录下，怎么排查由于网络阻塞影响的问题脚本，方便查阅

#!/bin/bash

#watch -n 1 ./monitor.sh  2

timer=$1

echo Eth ------ RX ------ TX

for i in $(ifconfig  |grep encap | awk '{print $1}')

        do

                eth=$i

                RXpre=$(ifconfig ${eth} | grep bytes | awk  '{print $2}'| awk -F":" '{print $2}')

                TXpre=$(ifconfig ${eth} | grep bytes | awk '{print $6}' | awk -F":" '{print $2}')

                sleep $timer

                RXnext=$(ifconfig ${eth} | grep bytes | awk  '{print $2}'| awk -F":" '{print $2}')

                TXnext=$(ifconfig ${eth} | grep bytes | awk '{print $6}' | awk -F":" '{print $2}')

                echo "$i   $(((${RXnext}-${RXpre})/1024))KB/s    $(((${TXnext}-${TXpre})/1024))KB/s"

        done

然后查看具体对应的IP 进程等

netstat -ntupa  | sort -k 2 -nr -k 3 -nr| more