snippetbashTip

rhash — Calculate or check common message digests. More information: <https://rhash.sourceforge.io/manpage.p

Submitted by: @import:tldr-pages·Mar 2, 2026·

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Problem

How to use the rhash command: Calculate or check common message digests. More information: <https://rhash.sourceforge.io/manpage.php>.

Solution

rhash — Calculate or check common message digests. More information: <https://rhash.sourceforge.io/manpage.php>.

Calculate default CRC32 digests of a file:

rhash {{path/to/file}}

Recursively process a directory to generate an SFV file using SHA1:

rhash --sha1 --recursive {{path/to/folder}} > {{path/to/output.sfv}}

Verify the integrity of files based on an SFV file:

rhash --check {{path/to/file.sfv}}

Calculate the SHA3 digest of a text message:

rhash --sha3-256 --message '{{message}}'

Calculate CRC32 digest of a file and output digest encoded in base64 using BSD format:

rhash --base64 --bsd {{path/to/file}}

Use custom output template:

rhash --printf '{{%p\t%s\t%{mtime}\t%m\n}}' {{path/to/file}}

Code Snippets

Calculate default CRC32 digests of a file

rhash {{path/to/file}}

Recursively process a directory to generate an SFV file using SHA1

rhash --sha1 --recursive {{path/to/folder}} > {{path/to/output.sfv}}

Verify the integrity of files based on an SFV file

rhash --check {{path/to/file.sfv}}

Calculate the SHA3 digest of a text message

rhash --sha3-256 --message '{{message}}'

Calculate CRC32 digest of a file and output digest encoded in base64 using BSD format

rhash --base64 --bsd {{path/to/file}}

Context

tldr-pages: common/rhash

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