download-iso-directly2usb.sh

#!/bin/bash

# You want to create a bootable Linux USB thumdrive. But you don’t have the current ISO in hand.
# This script will download the ISO to the current directory while burning it to your USB device at the same time.
# You can use this script to write an ISO to the USB drive directly from the Internet, and having a copy of the actual ISO in your current directory.
# Sample one-liner for the same job:
# wget -O - http://archive.ubuntu.com/ubuntu/dists/trusty/main/installer-i386/current/images/netboot/mini.iso | tee mini32-1.iso > mini32-2.iso

function usage {
	mybasename=$(basename $0)
	echo "
Usage: $mybasename URL DEVICENAME
  URL        : URL of the ISO file
  DEVICEPATH : Path for the usb device

Example:
  $mybasename http://archive.ubuntu.com/ubuntu/dists/devel/main/installer-amd64/current/images/netboot/mini.iso /dev/sdx
  
You can learn the DEVICEPATH of your USB drive by using one of the commands below:
  1. lsblk -o MODEL,NAME,FSTYPE,LABEL,UUID,MOUNTPOINT
  2. blkid
  3. sudo fidsk -l
  4. sudo parted -ls
"
	exit 1
}

if [ $# -lt 2 ]
  then
    echo "Error: Not enough arguments supplied!"
    usage
fi

URL=$1
DEVICE=$2
FILE=$(basename $URL)

echo "URL      : $URL"
echo "FILENAME : $FILE"
echo "DEVICE   : $DEVICE"

wget -O - $URL | tee $FILE > $DEVICE