umount.crypt_LUKS version (return code: 0)
No vfsmount found while searching for "/tmp/sandpit/version" as a container file, or as a mountpoint. (According to the intersection of cmtab (/run/cmtab) with smtabs)
umount.crypt_LUKS --help (return code: 0)
Usage: umount.crypt_LUKS [-fnrv] [-t ARG] [-?|--help] [--usage]
-f (Option ignored)
-n Do not update /etc/mtab
-r (Option ignored)
-t ARG (Option ignored)
-v Be verbose - enable debugging
-?, --help Show this help message
--usage Display brief usage message