An administrator has successfully configured a cryptographic volume for dmcrypt, and has added the
following line to /etc/fstab:
/dev/mapper/cryptvol /media/crypt auto defaults 0 0
Upon booting the system, the error message “mount: special device /dev/mapper/cryptvol doest
exist” is displayed. What configuration file has the administrator forgotten to edit?
(Provide the full path and filename)