#!/bin/sh
IN=`grep eth0 /proc/net/dev | cut -f4 -d\ `
OUT=`grep eth0 /proc/net/dev | cut -f39 -d\ `
echo "Traffic in: `echo scale=2\;$IN / 1024^2 |bc` MB"
echo "Traffic out: `echo scale=2\;$OUT / 1024^2 |bc` MB"