LiveCD Remastering: What causes "stuck" dev/proc mounts?

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http://askubuntu.com – I've had this problem a few times, but I'm hoping somebody can shed some light on the matter. I first experienced this when I first started remastering LiveCD's for 11.10beta1 to make a Gnome Shell default install instead of Unity. However, it continues to happen and it's very inconvenient. Well, what happens is that you set your mounts like so: mount --bind /dev /my/chroot/dev mount -t proc none /my/chroot/proc mount -t sysfs none /my/chroot/sys mount -t devpts none /my/chroot/dev/pts chroot /my/chroot Then inside the chroot: export HOME=/root export LC_ALL=C dbus-uuidgen > /var/lib/ (HowTos)