How to use mount.crypt options

[T o n g <mlist4suntong@yahoo.com>]

On Thu, 03 Feb 2011 17:20:06 +0000, T o n g wrote:

> Thanks. Now I'm one step further, but bumped into another problem:

[reposting the same message with added questions]

On Thu, 03 Feb 2011 17:42:18 +0100, Jochen Schulz wrote:

>> I can't figure out how to use the remount option of mount.crypt from
>> its man page. . . 
> 
> Use a comma to separate mount options, just like in the /etc/fstab:
> 
> mount -o remount,ro …

Thanks. Now I'm one step further, but bumped into another problem:

 mount: you must specify the filesystem type
 remount /dev/sdb15 failed with run_sync status 32

I've tried the following but they both failed:

 mount.crypt -v -o 'remount,ro -t ext2' . . . 
 mount.crypt -v -o 'remount,ro -t crypt' . . . 

Furthermore, is there any way for me to use the keyfile option for the 
LUKS encrypted volume when mounting it? I saw...

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

Thanks

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