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Creating a chroot

mkdir -p $CHROOT
/usr/share/debootstrap/debootstrap stable $CHROOT

Once the debootstrap is done, mount /proc and /sys and copy over some configs and you're ready to chroot.

echo "proc $CHROOT/proc proc defaults 0 0" >> /etc/fstab
echo "sysfs $CHROOT/sys sysfs defaults 0 0" >> /etc/fstab

mount proc $CHROOT/proc -t proc
mount sysfs $CHROOT/sys -t sysfs
mount -o bind /dev ${CHROOT}/dev

cp /etc/hosts $CHROOT/etc/hosts
cp /proc/mounts $CHROOT/etc/mtab
echo "Entering the chroot"
echo "Welcome to chroot" >> $CHROOT/root/.bashrc
chroot $CHROOT /bin/bash

Now that you are in your shiny chroot, let's add some finishing touches.

You might want to set up your locales:

echo "en_US.UTF-8 UTF-8" > /etc/locale.gen

And work around bug #685034

cp  /bin/true /usr/bin/ischroot

And make sure daemons won't get started by dpkg

cat > ./usr/sbin/policy-rc.d <<EOF
exit 101
chmod a+x ./usr/sbin/policy-rc.d