ipfire serial console aktivieren

03.08.2021 https://community.ipfire.org/t/activate-the-serial-console/3323

# Enable serial console in GRUB defaults
          echo "GRUB_TERMINAL=\"serial console\"" >> /etc/default/grub
          echo "GRUB_SERIAL_COMMAND=\"serial --unit=0 --speed=115200\"" >> /etc/default/grub
          sed -i -e "s|panic=10|& console=ttyS0,115200n8|g" /etc/default/grub
 # Re-generate GRUB configuration
          /usr/sbin/grub-mkconfig -o /boot/grub/grub.cfg

sudo screen /dev/ttyUSB0 115200