Please add caution warning to instructions to create a usb bootable stick.

[Alexandros Prekates <aprekates@openmailbox.org>]

In 4.3.1. Preparing a USB stick using a hybrid CD or DVD image [1] 
it says:

# cp debian.iso /dev/sdX
# sync

Unfortunately i used /dev/sdb1  spenting a couple of hours 
trying to figure out why my mobo would boot my usb flash with 
the debian image resulting in the thread:
''USB bootable debian stick wont boot on 890FXA-GD65 mobo''[2]
in the debian-user list  where after some messages a friend send
me an analytical example [3] understanding my error which in short
was that i wrote the image to a partition not to the whole drive.

So i think that it'd be helpfull the aforementioned 4.3.1 paragraph 
to have a warning of caution to use the name of disk not partition.

I know that in better days with less fatique and more time i could have
think of my mistake but under pressure i blindly followed the manual 
substituting the 'X' with what ever i like.
 
Alexandros Prekates
http://librebytes.gr












[1] https://www.debian.org/releases/stable/amd64/ch04s03.html.en
[2] https://lists.debian.org/debian-user/2014/09/msg00786.html
[3] https://lists.debian.org/debian-user/2014/09/msg00800.html