How to write live image to usb stick

[Gerardo Ballabio <gerardo.ballabio@gmail.com>]

Hello,

I'm trying to write a bootable iso image (jessie live dvd) to a USB stick. I'm running jessie with Gnome.

This page: <https://www.debian.org/releases/jessie/i386/ch04s03.html.en> says that I should first make sure what the correct device name is (done -- df lists the stick as /dev/sdb1), then unmount the stick (done), then "cp image.iso /dev/sdb" (I suppose as root, so I used sudo).

That fails with this error:

cp: cannot create regular file ‘/dev/sdb’: No medium found

"ls -l /dev/sdb" shows this:

brw-rw---- 1 root disk 8, 16 Sep 13 16:53 /dev/sdb

Can you please help me?

Thank you in advance

 Gerardo