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#!/bin/bash#Mount & umount usb devicesecho 'Select device to mount (full path):'echo '/dev/sdx  <--- Incorrect'echo '/dev/sdx1  <--- Correct'ls -l /dev/sd* | grep storageread deviceecho Select the mount point:echo 1. /mnt/celularecho 2. /mnt/ipódecho 3. /mnt/pendriveecho 4. /mnt/usb4read pointwhile [ "$point" != "1" ] && [ "$point" != "2" ] && [ "$point" != "3" ] && [ "$point" != "4" ]; do    echo invalid option    echo Select a valid mount point    read pointdonecase $point in1) sudo mount -t vfat $device /mnt/celular && echo $device mounted to /mnt/celular && echo --- Press a key to umount --- && read && sudo umount /mnt/celular && echo /mnt/celular umounted && read;;2) sudo mount -t vfat $device /mnt/ipod && echo $device mounted to /mnt/ipod && echo --- Press a key to umount --- && read && sudo umount /mnt/ipod && echo /mnt/ipod umounted && read;;3) sudo mount -t vfat $device /mnt/pendrive && echo $device mounted to /mnt/pendrive && echo --- Press a key to umount --- && read && sudo umount /mnt/pendrive && echo /mnt/pendrive umounted && read;;4) sudo mount -t vfat $device /mnt/usb4 && echo $device mounted to /mnt/usb4 && echo --- Press a key to umount --- && read && sudo umount /mnt/usb4 && echo /mnt/usb4 umounted && read;;esac