What are checksums, CRCs and hashes? What is required for a hash to be cryptographic, and how any of these affect your Mac? Some answers and explanations.
cintch
How can you check the integrity of important files you have stored in iCloud, or in a Time Machine backup, such as those made by Big Sur to APFS?
The command tool member of the Dintch suite for tagging files with their SHA256 digest, to keep a watch on their integrity.
This can now be incorporated into your own scripts, to check the integrity of important files automatically.
The Eclectic Light Company 