escapado

#!/bin/sh

xf=$(curl -s --user admin:password http://192.168.0.10/status.htm | grep 'MB free' | awk '{print $1}')

xg=190782 # Total Size

xp=$(expr \( \( ${xg} - ${xf} \) \* 100 \) / ${xg})

xb=$(expr \( ${xg} - ${xf} \) / 1024)

xx=$(expr ${xg} / 1024)

echo ${xp}"% "${xb}"GiB/"${xx}"GiB"