网卡流量监控 #!/bin/bash PATH=/bin:/usr/bin:/sbin:/usr/sbin:/usr/local/bin:/usr/local/sbin; export PATH function traffic_monitor {

系统版本

OS_NAME=$(sed -n ‘1p’ /etc/issue)

网口名

eth=$1 #判断网卡存在与否,不存在则退出 if [ ! -d /sys/class et/$eth ];then echo -e “Network-Interface Not Found” echo -e “You system have network-interface:\nls /sys/class et” exit 5 fi while [ “1” ] do

状态

STATUS=”fine”

获取当前时刻网口接收与发送的流量

RXpre=$(cat /proc et/dev | grep $eth | tr : “ “ | awk ‘{print $2}’) TXpre=$(cat /proc et/dev | grep $eth | tr : “ “ | awk ‘{print $10}’)

获取1秒后网口接收与发送的流量

sleep 1 RXnext=$(cat /proc et/dev | grep $eth | tr : “ “ | awk ‘{print $2}’) TXnext=$(cat /proc et/dev | grep $eth | tr : “ “ | awk ‘{print $10}’) clear

获取这1秒钟实际的进出流量

RX=$((${RXnext}-${RXpre})) TX=$((${TXnext}-${TXpre}))

判断接收流量如果大于MB数量级则显示MB单位,否则显示KB数量级

if [[ $RX -lt 1024 ]];then RX=”${RX}B/s” elif [[ $RX -gt 1048576 ]];then RX=$(echo $RX | awk ‘{print $1/1048576 “MB/s”}’) $STATUS=”busy” else RX=$(echo $RX | awk ‘{print $1/1024 “KB/s”}’) fi

判断发送流量如果大于MB数量级则显示MB单位,否则显示KB数量级

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

打印信息

echo -e “===================================” echo -e “Welcome to Traffic_Monitor stage” echo -e “version 1.0” echo -e “Since 2014.2.26” echo -e “Created by showerlee” echo -e “BLOG:

http://www.showerlee.com “ echo -e “===================================” echo -e “System: $OS_NAME” echo -e “Date: date +%F” echo -e “Time: date +%k:%M:%S” echo -e “Port: $1” echo -e “Status: $STATUS” echo -e “ \t RX \tTX” echo “——————————”

打印实时流量

echo -e “$eth \t $RX $TX “ echo “——————————”

退出信息

echo -e “Press ‘Ctrl+C’ to exit” done }

判断执行参数

if [[ -n “$1” ]];then

执行函数

traffic_monitor $1 else echo -e “None parameter,please add system netport after run the script! \nExample: ‘sh traffic_monitor eth0’” fi