What Is a Checksum (and Why Should You Care)?

A checksum is a sequence of numbers and letters used to check data for errors. If you know the checksum of an original file, you can use a checksum utility to confirm your copy is identical.

from How-To Geek https://www.howtogeek.com/363735/what-is-a-checksum-and-why-should-you-care/
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