I'm trying to create debian live USB, in order to migrate from Ubuntu to Debian (I want ot try it before).
I downloaded the iso http://cdimage.debian.org/debian-cd/current-live/amd64/iso-hybrid/debian-live-7.2-amd64-gnome-desktop.iso taken from the list http://cdimage.debian.org/debian-cd/current-live/amd64/iso-hybrid/
After that, I inserted my USB pendrive (previously formatted in FAT), and by typing mount I found that the USB is /dev/sdb1. Following the Debian site, I typed dd if=debian-live-7.2-amd64-gnome-desktop.iso of=/dev/sdb1 bs=4M
and what I obtained is dd: opening `/dev/sdb1': Permission denied
I tried with sudo ..., and it work, but if I try to boot from the USB what I obtain is a black screen, followed by the normal booting of my laptop.
I checked the filesysytem of the USB with gparted, and it is not recognized. Am I missing something?