tldr/pages/common/shasum.md

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# shasum
> Calculate or check cryptographic SHA checksums.
- Calculate the SHA1 checksum for a file:
`shasum {{path/to/file}}`
- Calculate the SHA256 checksum for a file:
`shasum --algorithm 256 {{path/to/file}}`
- Calculate the SHA512 checksum for multiple files:
`shasum --algorithm 512 {{path/to/file1}} {{path/to/file2}}`
- Calculate and save the list of SHA256 checksums to a file:
`shasum --algorithm 256 {{path/to/file1}} {{path/to/file2}} > {{path/to/file.sha256}}`
- Check a file with a list of sums against the directory's files:
`shasum --check {{path/to/file}}`
- Check a list of sums and only show a message for files for which verification fails:
`shasum --check --quiet {{path/to/file}}`
- Calculate the SHA1 checksum from stdin:
`{{some_command}} | shasum`