#!/bin/bash
#
mkdir /tmp/perm
mkdir /tmp/work
mkdir /mnt/overlay
#
mount -t overlay overlay -o lowerdir=/,upperdir=/tmp/perm,workdir=/tmp/work /mnt/overlay
#
mount --bind /dev     /mnt/overlay/dev &&
mount --bind /dev/pts /mnt/overlay/dev/pts &&
mount --bind /sys     /mnt/overlay/sys &&
mount --bind /proc    /mnt/overlay/proc
#
chroot /mnt/overlay
#