Вот как я поступаю с schroot
в Ubuntu версии 10.04 и выше:
# list all sessions:
schroot --list --all-sessions
# if the above command does not work, just type `mount`. The bind mount
# points with something like this in the mount path is the session name you want to get:
precise-a4aac8e0-663c-4fec-8fb2-16e4b06557e3 (<chroot_name>-<id>)
# now run this to properly end the session:
schroot -e -c precise-ca6c72e4-0e9f-4721-8a0e-cca359e2c2fd