查詢網卡流量的腳本

#!/bin/bash

while [ "1" ]

do

eth=$1

RXpre=$(cat /proc/net/dev | grep $eth | tr : " " | awk '{print $2}'|head -1)

TXpre=$(cat /proc/net/dev | grep $eth | tr : " " | awk '{print $10}'|head -1)

sleep 1

RXnext=$(cat /proc/net/dev | grep $eth | tr : " " | awk '{print $2}'|head -1)

TXnext=$(cat /proc/net/dev | grep $eth | tr : " " | awk '{print $10}'|head -1)

clear

echo  -e  "\t RX `date +%k:%M:%S` TX"

RX=$((${RXnext}-${RXpre}))

TX=$((${TXnext}-${TXpre}))

if [[ $RX -lt 1024 ]];then

RX="${RX}B/s"

elif [[ $RX -gt 1048576 ]];then

RX=$(echo $RX | awk '{print $1/1048576 "MB/s"}')

else

RX=$(echo $RX | awk '{print $1/1024 "KB/s"}')

fi

if [[ $TX -lt 1024 ]];then

TX="${TX}B/s"

elif [[ $TX -gt 1048576 ]];then

TX=$(echo $TX | awk '{print $1/1048576 "MB/s"}')

else

TX=$(echo $TX | awk '{print $1/1024 "KB/s"}')

fi

echo -e "$eth \t $RX   $TX "

done