sha1sum

Calculate SHA1 cryptographic checksums.

• Calculate the SHA1 checksum for a file:

sha1sum {path/to/file}

• Calculate SHA1 checksums for multiple files:

sha1sum {path/to/file1} {path/to/file2}

• Calculate and save the list of SHA1 checksums to a file:

sha1sum {path/to/file1} {path/to/file2} > {path/to/file.sha1}

• Read a file of SHA1 sums and verify all files have matching checksums:

sha1sum --check {path/to/file.sha1}

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

sha1sum --check --quiet {path/to/file.sha1}

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

sha1sum --ignore-missing --check --quiet {path/to/file.sha1}

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