Hi, i am trying to make sense of the title of this thread.
If it is about putting an existing individual Debian installation as bootable ISO system onto an USB stick: Difficult, at best. If it is about replacing the use of Debian Live on DVD by Debian Live on USB stick, then the proposals of dd, cat, and cp will do with a current Debian Live ISO image. E.g. from https://cdimage.debian.org/debian-cd/current-live/amd64/iso-hybrid/ Important is that you use the base device, e.g. /dev/sdc, not a partition device like e.g. /dev/sdc1. Further be aware that all old content of the USB drive will become nearly unaccessible if not overwritten. Your drive will get a new partition table by copying the Live ISO. (Make sure you use the right /dev/sd? as copy target. Not your system disk.) See also https://www.debian.org/CD/faq/#write-usb Verification of the written USB drive is done as with DVD. See https://www.debian.org/CD/faq/#verify Have a nice day :) Thomas