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mount.crypt

mount.crypt(8) pam_mount mount.crypt(8)

Name
mount.crypt - mount a dm-crypt encrypted volume

Syntax
mount.crypt [-nrv] [-o options] device directory

Options
-o options
Set further mount options. mount.crypt will take out its own options it recognizes and passes any remaining options on to the under-
lying mount program. See below for possible options.

-n Do not update /etc/mtab. Note that this makes it impossible to unmount the volume by naming the container - you will have to pass
the mountpoint to umount.crypt.

-r Set up the loop device (if necessary) and crypto device in read-only mode. (The mount itself will necessarily also be read-only.)
Note that doing a remount using `mount /mnt -o remount,rw` will not make the mount readwrite. The crypto and loop devices will have
to be disassociated first.

-v Turn on debugging and be a bit more verbose.

Mount options
cipher The cryptsetup cipher used for the encrypted volume. This option is mandatory. pmt-ehd(8) defaults to creating volumes with
"aes-cbc-essiv:sha256" as a cipher.

dm-timeout=seconds
Wait at most this many seconds for udev to create /dev/mapper/name after calling cryptsetup(8). The default value is 0 seconds.

fsck Run fsck on the container before mounting it.

fsk_cipher
The OpenSSL cipher used for the filesystem key.

fsk_hash
The OpenSSL hash used for producing key and IV.

fstype The exact type of filesystem in the encrypted container. The default is to let the kernel autodetect.

keyfile
The path to the key file. This option is mandatory for "normal" crypto volumes and should not be used for LUKS volumes.

remount
Causes the filesystem to be remounted with new options. Note that mount.crypt cannot switch the underlying loop device (if applies)
or the crypto device between read-only and read-write once it is created; only the actual filesystem mount can be changed, with lim-
its. If the loop device is read-only, the crypto device will be read-only, and changing the mount to read-write is impossible. Sim-
ilarly, going from rw to ro will only mark the mount read-only, but not the crypto or loop device, thus making it impossible to set
the filesystem the crypto container is located on to read-only.

ro Same as the -r option.

verbose
Same as the -v option.

Obsolete mount options
This section is provided for reference.

loop This option used to set up a loop device, because cryptsetup(8) expects a block device. The option is ignored because mount.crypt
can figure this out on its own.

pam_mount 2008-10-08 mount.crypt(8)