:: create debian live usb

:: download debian

# wget //cdimage.debian.org/debian-cd/6.0.1a/i386/iso-cd/debian-6.0.1a-i386-xfce+lxde-CD-1.iso

other debian version checking on debian download page

:: create linux debian live usb on linux
0. plugin usb pendrive and checking usb device address

# fdisk -l

1. unmount usb device if it’s mounting

# df -h
# umount /mount/point/usb

2. create linux debian live usb using dd command

# dd if=debian-6.0.1a-i386-xfce+lxde-CD-1.iso of=/dev/sdb

* /dev/sdb is usb pendrive device not partition of usb pendrive (/dev/sdb1)

3. booting your linux debian live usb

:: links
+ google