The description of Backup verification tool - Play With New Friends
cpverify verifies that a file or directory structure has been copied or burned without errors. That is, the copied file(s) is exactly the same as the original. This is done by calculating a cryptographic checksum using the md5 message-digest algorithm on each file from the source and the copy destination. The checksums for each file are then compared. Any difference indicates that the copied file is not the same as the original source file.
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