MD5 (Message Digest 5) is a widely used cryptographic hash function that produces a 128-bit digest from a message of arbitrary length. MD5 is commonly used to verify data integrity and to detect tampering with digital content. To check the MD5 sum of a file, you can use the md5sum command-line utility.
The md5sum command is available on most Unix-like operating systems and on Windows (as part of the Microsoft Sysinternals suite). To use the md5sum command, simply pass the path to the file you want to check as an argument.