Install isomd5sum by entering the following commands in the terminal:
sudo apt update sudo apt install isomd5sum
Description:
ISO9660 checksum utilities
isomd5sum is a set of utilities for implanting a MD5 checksum in an ISO (or any block device), then verifying the checksum later. isomd5sum is not simply an MD5 of the entire ISO; it checksums the data inside a standard ISO9660 image and write block checksum information to an ISO9660 header, that will carry over to burning the CD. . This package contains the utilities implantisomd5 and checkisomd5.
Homepage: https://github.com/rhinstaller/isomd5sum
Version: 1:1.2.1-1
Section: universe/misc