Hi, Jan Wilmans wrote: > I've created a bootable USB stick that boot debian 10
By which procedure, exactly ? There are several which produce quite different outcome. > how can I insert it into the USB sticks read only filesystem? If you have an ISO 9660 filesystem on the base device of the stick and did not add new partitions, then you could use multi-session or re-pack the ISO. It might become tricky, nevertheless. Consider to install Debian on a USB stick and to customize it as any other Debian system, rather than putting an ISO image onto the stick. -------------------------------------------------------------------- That said, multi-session works like this: cp debian-10.0.0-amd64-xfce.iso test.iso file_or_tree_on_disk=...path... path_in_iso=...path... xorriso -dev test.iso \ -map "$file_or_tree_on_disk" "$path_in_iso" \ -boot_image any replay (You may work directly on the stick by an address like -dev stdio:/dev/sdd but for first experiments i'd advise a disk file as test object.) Repacking is discussed on https://wiki.debian.org/RepackBootableISO Have a nice day :) Thomas