Write a shell script to count the local traffic during a certain time period

Below is the output information of my wlan0 NIC, you can use Ifconfig or Ifconfig | Sed-n '/wlan0/,10p ' gets the format of the displayed information

wlan0     Link encap:ethernet  hwaddr xx:xx:xx:xx:xx:xx  

          inet addr:172.29.164.251  bcast:172.29.167.255  mask:255.255.248.0

          INET6 addr:2001:da8:c803:4a57:e190:606f:3155:9369/64 Scope:global

          INET6 addr:fe80::6e71:d9ff:fe0b:27f6/64 scope:link

          INET6 addr:2001:da8:c803:4a57:6e71:d9ff:fe0b:27f6/64 Scope:global

Up broadcast RUNNING multicast mtu:1500 metric:1

RX packets:1305 errors:0 dropped:0 overruns:0 frame:0

TX packets:647 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:370741 (362.0 KiB) TX bytes:117872 (115.1 KiB)

The following script obtains the last line of Rx, TX information at two points in time, and then counts the total traffic over time.

The final printout statistics are on the screen.

#!/bin/bash

#network Traffic Statistics

#Write by Ricardo.su 2015-04-30

time_range=10

Time= ' Date +%m '-"%d" "%k": "%m"

rx_point_1= ' Ifconfig wlan0 | grep [[: Space:]]rx.*tx | awk ' {print $} ' | Cut-c7-'

tx_point_1= ' Ifconfig wlan0 | grep [[: Space:]]rx.*tx | awk ' {print $6} ' | Cut-c7-'

Sleep $TIME _range

Rx_point_2= ' Ifconfig wlan0 | grep [[: Space:]]rx.*tx | awk ' {print $} ' | Cut-c7-'

Tx_point_2= ' Ifconfig wlan0 | grep [[: Space:]]rx.*tx | awk ' {print $6} ' | Cut-c7-'

Rx_rs=$ (((rx_point_2-rx_point_1)/1024))

Tx_rs=$ (((tx_point_2-tx_point_1)/1024))

echo "Date $time"

echo "Average Network traffic in $TIME _range s:rx $rx _rs kb TX $tx _rs KB"

Write a shell script to count the local traffic over a period of time