[dm-crypt] password -md5 in grub.conf/menu.lst

Arno Wagner arno at wagner.name
Wed Aug 17 17:50:31 CEST 2011

This seems to be a config file option of grub-md5-crypt,
and has nothing to do with cryptsetup, dm-crypt or LUKS.

If I understand the documentation correctly, this is
an md5-ed password that either secures interactive Grub mode
or prevents script continuation before password entry.

The format seems to be the same as in /etc/shadow
for md5 passwords. You can read up on it here:



On Wed, Aug 17, 2011 at 10:17:16AM -0400, ken wrote:
> In grub/menu.lst file my /boot partition is a line like this:
> password --md5 $1$Mb9vxXPV$pAbcdTxr4Twh32XXgns2/
> The last bit is 35 characters long.
> Is this the hash digest of the passphrase?  Is the final slash character
> (/) just another character or is it in some way especially significant?
> tnx
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> dm-crypt mailing list
> dm-crypt at saout.de
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Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno at wagner.name 
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