Install Debian by USB Thumb Drive

The following script can make an USB Thumb Drive as a Debian installation disk. Insert the USB Thumb Drive into the PC before running the script. This script assumes the USB Thumb Drive is /dev/sda which may be different on your system.
Please note: Everything on the USB Thumb Drive will be erased after running this script.

#!/bin/bash
wget -c http://cdimage.debian.org/debian-cd/4.0_r1/i386/iso-cd/debian-40r1-i386-businesscard.iso
wget -c http://ftp.nl.debian.org/debian/dists/etch/main/installer-i386/current/images/hd-media/boot.img.gz
echo "Copy boot image..."
zcat boot.img.gz > /dev/sda
echo "Copy businesscard.iso..."
mount /dev/sda /mnt
cp debian-40r1-i386-businesscard.iso /mnt/businesscard.iso
umount /mnt
echo "Make disk bootable..."
syslinux /dev/sda