shasum

Calculate SHA cryptographic checksums. More information: https://manned.org/shasum.

• Calculate the SHA1 checksum for one or more files:

shasum path/to/file1 path/to/file2 …

• Calculate the SHA checksum for one or more files with the specified algorithm:

shasum --algorithm 1|224|256|384|512|512224|512256 path/to/file1 path/to/file2 …

• Calculate a SHA1 checksum from stdin:

command | shasum

• Calculate and save the list of SHA256 checksums to a file:

shasum --algorithm 256 path/to/file1 path/to/file2 … > path/to/file.sha256

• Read a file of SHA checksums and filenames and verify all files have matching checksums (the algorithm will be automatically detected):

shasum --check path/to/file

• Only show a message for missing files or when verification fails:

shasum --check --quiet path/to/file

• Only show a message when verification fails, ignoring missing files:

shasum --ignore-missing --check --quiet path/to/file

• Check a known SHA checksum of a file:

echo known_sha_checksum_of_the_file path/to/file | shasum --check