grub2: cryptomount
16.3.19 cryptomount
-------------------
-- Command: cryptomount device|'-u' uuid|'-a'|'-b'
Setup access to encrypted device. If necessary, passphrase is
requested interactively. Option DEVICE configures specific grub
device (Naming convention); option '-u' UUID configures
device with specified UUID; option '-a' configures all detected
encrypted devices; option '-b' configures all geli containers that
have boot flag set.
GRUB suports devices encrypted using LUKS and geli. Note that
necessary modules (LUKS and GELI) have to be loaded manually before
this command can be used.