rx speed all networks

speedmeter.sh

#!/usr/bin/env bash

for a in `ls -1 /sys/class/net/`
do
	declare pre_${a}_rxbytes=`cat /sys/class/net/$a/statistics/rx_bytes`
	declare pre_${a}_txbytes=`cat /sys/class/net/$a/statistics/tx_bytes`
done


while true
do
	sleep 1

	for a in pppoe0
	do
		declare post_${a}_rxbytes=`cat /sys/class/net/$a/statistics/rx_bytes`
		declare post_${a}_txbytes=`cat /sys/class/net/$a/statistics/tx_bytes`
		
		echo speed $a Down: $[ (post_${a}_rxbytes - pre_${a}_rxbytes)*8/1024/1024 ] Up: $[ (post_${a}_txbytes - pre_${a}_txbytes)*8/1024/1024 ]
		
		declare pre_${a}_rxbytes=`cat /sys/class/net/$a/statistics/rx_bytes`
		declare pre_${a}_txbytes=`cat /sys/class/net/$a/statistics/tx_bytes`
	done

done