Howto `debootstrap` a bare minimal Debian Desktop from scratch
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- partitioning and filesystem
- create a root partition and swap partition
- `mkfs.ext4` and `mkswap`
- run debootstrap
- `debootstrap bullseye /mnt/ http://ftp.de.debian.org/debian`
- bind mound `dev` `proc` and `sys`
- `for m in dev proc sys ; do mount /$m /mnt/$m ; done`
- chroot into the new environment and run bash
- `chroot /mnt/ /bin/bash`
- give the machine a good hostname
- `echo mycrazyhostname > /etc/hostname`
- install basic stuff, like linux kernel, grub and networking-scripts
- `apt update ; apt install linux-image-generic grub-pc ifupdown man console-data locales`
- do locales settings
- `dpkg-reconfigure locales`
- configure keyboard
- `dpkg-reconfigure keyboard-configuration`
- install X-Server and window manager
- `apt install --no-install-recommends xserver-xorg jwm xdm xterm`
- ensure grub is installed
- `grub-install /dev/sdXY ; update-grub`
- set root password
- `passwd root`
- create a user
- `adduser coolusername`
- create fstab with content 
- `/dev/sdXY / ext4 defaults 0 1`
- exit chroot and `reboot`