tldr/pages/common/shasum.md

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 {{[-c|--check]}} {{path/to/file}}

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

shasum {{[-c|--check]}} --quiet {{path/to/file}}

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

shasum --ignore-missing {{[-c|--check]}} --quiet {{path/to/file}}

• Check a known SHA checksum of a file:

echo {{known_sha_checksum_of_the_file}} {{path/to/file}} | shasum {{[-c|--check]}}