On Wed, 04 Mar 2020 16:32:42 +0100 (CET) Cichas <cic...@post.cz> wrote:
> > Hello guys, > > sorry if this is documented somewhere but today I decided to ask here > as it is something fundamental I cannot understand. After 20 years I > decided to try Debian again (as VM for start). I am installing it > from debian-10.3.0- amd64-xfce-CD-1.iso. As it is in remote location > with problematic Internet access I wanted to do offline install. Not a real answer to your question, but you could build an install Blu-ray with the jigdo-tool. https://www.debian.org/CD/jigdo-cd/ The current first one (buster) you can create is 21 GB in size. There are 4 Blu-rays in total. You need a writer/reader for those disks of course, not sure if dd to an USB flash drive works with the Blu-ray iso-file. I use a special USB flash drive which supports booting from iso-files, the IODD mini (I did just a test, the debian install Blu-ray iso-file boots fine) http://iodd.kr/wordpress/product/iodd-mini/ Hope this helps