A checksum is a special type of hash that is used to verify the integrity of a file. Verifying a checksum ensures there was no corruption or manipulation during the download and the file was downloaded completely and correctly.
A common use case for checksum verification is to verify a large download like an
.iso disk image.
MD5 and SHA1 hashes are commonly used for this task.
We will look at easy ways to obtain a hash to verify a checksum.