How to see your NowTV and Sky routers total bandwidth usage with unix shell

# An unix shell script to display total transmitted data through you NowTV router (in the UK),
# should work with Sky router with a little bit of modification
# Refresh every 2 seconds, press Ctrl+C to stop.
# Replace the `admin:nowtv` with the username:password of your NowTV router's admin credential if you've changed it.

while true; \
do \
  curl  --user admin:nowtv  http://192.168.0.1/Now_TV_system.html  2>/dev/null  \
    | grep -ioE "(\d{4,}) " \
    | grep -o '[0-9]*' \
    | sed '/^\s*$/d' \
    | awk '{print ($1*10)/1024/1024}' \
    | tail -r \
    | sed '4q;d' \
    | awk '{print "Total transmitted data: "$1" GB"}'; \
  sleep 2; \
done

Update: 3/11/2018

A simple modification allows us view bandwidth usage in Sky router as well

# An unix shell script to display total transmitted data through you Sky router (in the UK),
# Refresh every 2 seconds, press Ctrl+C to stop.
# usage
# $ export SKY_PWD=[your sky password]
# $ curl https://gist.githubusercontent.com/mustakimali/13475ffd3eb02b3c8f48167b73643bda/raw/53abe9ee76a94654a0558375494d773cf33460a1/Sky_Total_Transmission.sh | bash

while true; \
do \
   curl  --user admin:$SKY_PWD  http://192.168.0.1/sky_system.html 2>/dev/null \
   | grep ' MER' \
   | grep -o '[0-9]*' \
   | head -1 \
   | awk '{print ($1*10)/1024/1024}' \
   | awk '{print "Total transmitted data: "$1" GB"}'; \
  sleep 2; \
done

The script is also available as gist