checkisomd5(1)

checkisomd51

Check an md5 checksum implanted by implantisomd5

Usage

checkisomd5 [--md5sumonly] [--verbose] [--gauge] [{isofilename | blockdevice}]

Overview

This manual page documents briefly the checkisomd5 command. checkisomd5 is a program that checks an embedded MD5 checksum in a ISO9660 image (.iso), or block device. The checksum is embedded by the corresponding implantisomd5 command.

The check can be aborted by pressing Esc key.

Exit status

Program returns exit status 0 if the checksum is correct, 1 if the checksum is incorrect or non-existent, or 2 if the check was aborted.

Options

--md5sumonly

Do not check the target. Instead, output human-readable information about the target's checksums.

--verbose

Display human-readable progress as the target is checked. Without this option, nothing is outputted except errors.

--gauge

Display a series of numbers from 0 to 100, corresponding to check progress. This output can be piped to dialog --gauge for a user-friendly progress bar.

Releases

11 releases since Debian 4.0 (Etch); the text changed 3 times.

  1. 4.0
  2. 5.0–6.0
  3. 7
  4. 8–Arch

--gauge since Debian 5.0 (Lenny).

From isomd5sum 1.2.5-3 in Arch Linux 2026-11-01. Parsed by carta from the page's man source.