if you dont want to erase the existing contents of your USB stick (or you even dont need a USB stick)
then grab vmlinuz and initrd from http://ftp.debian.org/debian/dists/stretch/main/installer-amd64/current/images/hd-media/ then place debian install iso of same version under root partition of disk (not only work for usb ,but also the partition on sdX you would not destory in next installation) reboot with these too vmlinuz and initrd from GRUB (you should have it as you mentioned existing workable system) and you are all through,nothing special to iso boot On Thu, May 2, 2019 at 14:42 Albretch Mueller <lbrt...@gmail.com> wrote: > something like: > > 1) download the iso's > > 2) go: <some application> /dev/sdb > > where "/dev/sdb" is the device a USB disk is linked to > > then you would plug the disk on your computer and take it from there > > For that I used to burn live DVD but there should be a better way > > lbrtchx > > -- Liu An