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Conectar a una raspberry por el cable de USB desde un portátil. 

https://howchoo.com/pi/raspberry-pi-gadget-mode

Probaremos con raspberry 4

Planchamos la ISO:
  dd if=2022-04-04-raspios-bullseye-armhf-lite.img of=/dev/mmcblk0 bs=1M

  1m25.225s

  rootfs/etc/dhcpcd.conf
<code>
interface usb0
static ip_address=192.168.69.1/24
static routers=192.168.69.1
static domain_name_servers=192.168.69.1 
</code>

Fichero boot/config.txt

Antes
<code>
# Enable DRM VC4 V3D driver
dtoverlay=vc4-kms-v3d
max_framebuffers=2
</code>
Después
<code>
# Enable DRM VC4 V3D driver
#dtoverlay=vc4-kms-v3d
dtoverlay=dwc2
max_framebuffers=2
</code>


  touch boot/ssh

Añadir después de "rootwait" esto "modules-load=dwc2,g_ether"
  boot/cmdline.txt
Antes:
  console=serial0,115200 console=tty1 root=PARTUUID=7d5a2870-02 rootfstype=ext4 fsck.repair=yes rootwait quiet init=/usr/lib/raspi-config/init_resize.sh
Después:
   console=serial0,115200 console=tty1 root=PARTUUID=7d5a2870-02 rootfstype=ext4 fsck.repair=yes rootwait modules-load=dwc2,g_ether quiet init=/usr/lib/raspi-config/init_resize.sh


Para crear un usuario inicial. Después de 4 abril del 2022, se ha deshabilitado el usuario pi:

https://downloads.raspberrypi.org/raspios_lite_armhf/release_notes.txt
  2022-04-04:
  * Default "pi" user has been removed; the first-boot wizard enforces the creation of a new user account

Solución: https://www.raspberrypi.com/news/raspberry-pi-bullseye-update-april-2022/

Se crea el fichero: boot/userconf o boot/userconf.txt con el contenido:
  username:encrypted-password
La contraseña se encripta:
  echo 'mypassword' | openssl passwd -6 -stdin