Explorer/RaspberryPi/PowerOffProtection

• Install

git clone https://github.com/marklister/overlayRoot.git
cd overlayRoot 
sudo bash install

sudo dphys-swapfile swapoff;\
sudo dphys-swapfile uninstall;\
sudo update-rc.d dphys-swapfile remove

• Check

check: reboot, create file, reboot, file is not here

/boot/cmdline.txt
remove "init=/sbin/overlayRoot.sh"

check: reboot, create file, reboot, file is here

• Usage

sudo mount -o remount,rw /ro
sudo chroot /ro