shasum

Calculate or check cryptographic SHA checksums.

• Calculate the SHA1 checksum for a file:

shasum {{filename}}

• Calculate the SHA256 checksum for a file:

shasum --algorithm 256 {{filename}}

• Calculate the SHA512 checksum for multiple files:

shasum --algorithm 512 {{filename1}} {{filename2}}

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

shasum --algorithm 256 {{filename1}} {{filename2}} > {{filename.sha256}}

• Check a file with a list of sums against the directory's files:

shasum --check {{list_file}}

• Check a list of sums and only show a message for files for which verification fails:

shasum --check --quiet {{list_file}}

• Calculate the SHA1 checksum from stdin:

{{somecommand}} | shasum