tldr/pages/common/shasum.md

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# 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 SHA256 checksum for one or more files:
`shasum --algorithm 256 {{path/to/file1 path/to/file2 ...}}`
- Calculate the SHA512 checksum for one or more files:
`shasum --algorithm 512 {{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 SHA1 sums and filenames and verify all files have matching checksums:
`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}}`