livecd-rootfs/live-build/ubuntu-desktop-next/hooks/08-etc-writable.chroot

#!/bin/sh
set -e

mkdir -p /etc/writable

# cloud-init needs to be able to modify hostname and has the ability to
# set the other two.
for f in timezone localtime hostname; do
    if [ -e /etc/$f ]; then
        echo "I: Moving /etc/$f to /etc/writable/"
        mv /etc/$f /etc/writable/$f
    fi
    echo "I: Linking /etc/$f to /etc/writable/"
    ln -s writable/$f /etc/$f
done