How do I stop all processes in a chroot?

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http://askubuntu.com – I have a number of LVM partitions, each containing an Ubuntu installation. Occasionally, I want to do an apt-get dist-upgrade, to update an installation to the most recent packages. I do this with chroot - the process is usually something like: $ sudo mount /dev/local/chroot-0 /mnt/chroot-0 $ sudo chroot /mnt/chroot-0 sh -c 'apt-get update && apt-get dist-upgrade' $ sudo umount /mnt/chroot-0 [ not shown: I also mount and unmount /mnt/chroot-0/{dev,sys,proc} as bind-mounts to the real /dev, /sys and /proc, as the dist-upgrade seems to expect these to be present ] However, after upgr (HowTos)