ipfire on a raspberry

img="https://downloads.ipfire.org/releases/ipfire-2.x/2.25-core157/ipfire-2.25.2gb-ext4.armv5tel-full-core157.img.xz"
wget ${img} -O ipfire.img.xz
xzcat ipfire.img.xz | sudo dd of=/dev/mmcblk0 bs=4M status=progress iflag=fullblock oflag=direct; sync

sudo mkdir -p /mnt/part1
sudo mount /dev/mmcblk0p1 /mnt/part1/
sudo sed -i s"~SERIAL-CONSOLE=.*"~"SERIAL-CONSOLE=OFF~" /mnt/part1/uENV.txt
grep "SERIAL-CONSOLE" /mnt/part1/uENV.txt
sync
sudo umount /mnt/part1/