Using CRC or md5sum from GRUB command line

[Barry G]

Hello:

I'd like to use the GRUB command line to verify image on my drive using GRUB's CRC or md5sum. 

I tried: 

crc (hd1, gpt1)/myfile.c32

and it returns 

error: unknown hash. 

GRUB returns this error for most things I try. 

In short, could someone give the steps to prepare a CRC or MD5SUM file from Linux and provide the complementary commands to run from the GRUB command line.    

 

Regards. 

--B