---
name: "rdd-verify"
section: "1"
platform: "linux"
package: "rdd"
version: "2.0.7-2+b1"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/rdd-verify"
---

# rdd-verify(1)

verifies checksums and hash values generated by rdd-copy(1)

## NAME

rdd-verify - verifies checksums and hash values generated by **[rdd-copy(1)](/rdd-copy/1.md)**

## SYNOPSIS

**rdd-verify \[*OPTION*\] *file1* ...**

## DESCRIPTION

**Rdd-verify** verifies checksums and hash values generated by **[rdd-copy(1)](/rdd-copy/1.md)**. Rdd stores checksums (Adler32 or CRC32) in files.  These files must be passed to **rdd-verify** for verification.

Hash values (MD5 or SHA1) computed by **[rdd-copy(1)](/rdd-copy/1.md)** must be passed to **rdd-verify** on the command line as hexadecimal strings.

**Rdd-verify** reads all input files (*file1*, ...) and recomputes the checksums and hash values that the user wishes to verify. The verification will very likely fail if the concatenation of the input files is different from the source that was copied by **[rdd-copy(1)](/rdd-copy/1.md)**.

## OUTPUT

All verification errors are reported on **stderr**.

## OPTIONS

- **-?, --help**

  Print a usage message.

- **-V, --version**

  Report version number and exit.

- **-v, --verbose**

  Be verbose (more messages).

- **-v, --verbose**

  Be verbose (more messages).

- **--checksum, --adler32** *file*

  Verify the Adler32 checksums stored in *file*.

- **--crc, --crc32** *file*

  Verify the CRC32 checksums stored in *file*.

- **--md5, --md5** *digest*

  Recompute the MD5 hash value.  It should be equal to *digest*.

- **--sha, --sha1** *digest*

  Recompute the SHA1 hash value.  It should be equal to *digest*.

A *digest* argument is a hexadecimal string.  Leading zeroes may not be omitted.

## EXAMPLES

- rdd-verify --md5 0123456789abcdef0123456789abcdef disk.img

  Compute the MD5 hash value over disk.img and verify whether it equals 0123456789abcdef0123456789abcdef.

- rdd-verify --adler32 checksums.a32 disk.img

  Compute the adler32 checksums over disk.img and compare each checksum to the corresponding checksum in checksums.a32.

## SEE ALSO

- **[rdd-copy(1)](/rdd-copy/1.md)**

  ## REPORTING BUGS

Report bugs to \<rdd@holmes.nl\>.

## ACKNOWLEDGEMENTS

Many thanks to all who reported bugs and successes, and who suggested improvements. You know who you are.

## COPYRIGHT

Copyright © 2002-2003 Netherlands Forensic Institute\
 This software comes with NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.