Which three tools are used for integrity verification of files?

sha256sum: This tool calculates the SHA-256 hash of a file, which can be used for integrity verification by comparing the hash value with a known, trusted value.

md5sum: This tool calculates the MD5 hash of a file, which can also be used to verify its integrity by checking against a known hash value.

md5deep: This is a tool that provides recursive MD5 hash calculation, which can be useful for verifying the integrity of multiple files at once.