实时查看Linux网卡流量Shell脚本

用法为watch -n 1 ./linuxidc.sh即可开始监看流量，按ctrl+c退出。

#!/bin/bash
eth=eth0
RXpre=$(ifconfig ${eth} | grep bytes | awk  '{print $2}'| awk -F":" '{print $2}')
TXpre=$(ifconfig ${eth} | grep bytes | awk '{print $6}' | awk -F":" '{print $2}')
sleep 1
RXnext=$(ifconfig ${eth} | grep bytes | awk  '{print $2}'| awk -F":" '{print $2}')
TXnext=$(ifconfig ${eth} | grep bytes | awk '{print $6}' | awk -F":" '{print $2}')
echo RX ----- TX
echo "$(((${RXnext}-${RXpre})/1024))KB/s   $(((${TXnext}-${TXpre})/1024))KB/s"