---
syntax: markdown
tags: [tldr, common]
source: https://github.com/tldr-pages/tldr.git
---
# 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	%s	%{mtime}	%m
}}' {{path/to/file}}`
