-use file as key material. With LUKS, key material supplied in key files via \-d are always used for existing passphrases. If you want to set a new key via a key file, you have to use a positional arg to \fIluksFormat\fR or \fIluksAddKey\fR.
+use file as key material.
+
+With LUKS, key material supplied in key files via \-d are always used for existing passphrases,
+except in \fIluksFormat\fR action where \-d is equivalent to positional key file argument.
+If you want to set a new key via a key file, you have to use a positional arg to \fIluksAddKey\fR.
+
+If the key file is "-", stdin will be used. With the "-" key file reading will
+not stop when new line character is detected. See section \fBNOTES ON PASSWORD PROCESSING\fR for more information.
+.TP
+.B "\-\-master-key-file"
+Use pre-generated master key stored in file. For \fIluksFormat\fR it allows LUKS header reformatting with the same master key (if all other parameters are the same existing encrypted data remains intact).
+
+For \fIluksAddKey\fR it allows adding new passphrase with only master key knowledge.
+.TP
+.B "\-\-use-random"
+.TP
+.B "\-\-use-urandom"
+For \fIluksFormat\fR it defines which kernel random number generator will be used for long-term key (volume key).