Shell脚本查看网卡实时流量

代码如下:

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1#!/bin/bash  

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3while [ "1" ]  

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5do  

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7eth=$1  

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9RXpre=$(cat /proc/net/dev | grep $eth | tr : " " | awk '{print $2}')  

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11TXpre=$(cat /proc/net/dev | grep $eth | tr : " " | awk '{print $10}')  

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13sleep 1  

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15RXnext=$(cat /proc/net/dev | grep $eth | tr : " " | awk '{print $2}')  

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17TXnext=$(cat /proc/net/dev | grep $eth | tr : " " | awk '{print $10}')  

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19clear  

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21echo  -e  "\t RX `date +%k:%M:%S` TX"  

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23RX=$((${RXnext}-${RXpre}))  

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25TX=$((${TXnext}-${TXpre}))  

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27if [[ $RX -lt 1024 ]];then  

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29RX="${RX}B/s"  

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31elif [[ $RX -gt 1048576 ]];then  

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33RX=$(echo $RX | awk '{print $1/1048576 "MB/s"}')  

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35else  

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37RX=$(echo $RX | awk '{print $1/1024 "KB/s"}')  

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39fi  

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41if [[ $TX -lt 1024 ]];then  

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43TX="${TX}B/s"  

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45elif [[ $TX -gt 1048576 ]];then  

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47TX=$(echo $TX | awk '{print $1/1048576 "MB/s"}')  

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49else  

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51TX=$(echo $TX | awk '{print $1/1024 "KB/s"}')  

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53fi  

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55echo -e "$eth \t $RX   $TX "  

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57done

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调用方式:

代码如下:

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1./traff.sh eth1  

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3或  

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5bash traff.sh eth1

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可以实时显示网卡流量大小: