These two algorithms, can generate a file itself unique (repetition probability tends to infinity) of the signature (32-bit 16 characters), that is, the same content of the file's signature will be the same, so that you can use this signature test, the transmission of the file and the original file is the same, if not the same, Prove that the original file lost some data during the transmission, causing the file corruption.
1. In the terminal: Input: md5sum filename//Can get the file's signature input: md5sum filename > FILENAME.MD5//The file The signature code is stored in a file in order to use it to verify other file input: Md5sum-c filename.md5//Verify the file in the current directory, if there is a match, then return OK, otherwise, fail
2. In Windows: Download a software called: winmd5sum, drag the file directly in to compare:
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