---
name: "nbd-trdump"
section: "1"
platform: "linux"
package: "nbd"
version: "3.27.1-4"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/nbd-trdump"
---

# nbd-trdump(1)

translate an nbd transaction log into human readable form

## NAME

nbd-trdump - translate an nbd transaction log into human readable form

## SYNOPSIS

**nbd-trdump**

## DESCRIPTION

**nbd-trdump** translates a transaction log produced by **nbd-server** (specifically by the **transactionlog** configuration directive) into human readable form.

The command acts as a traditional UNIX filter, i.e. the transaction log must be supplied on standard input, and the human readable output is sent to standard output.

## OUTPUT

The following may be output:

- **\>**

  A request packet sent from the client to the server.

- **\<**

  A reply packet sent from the server to the client.

- **\<S**

  A structured reply packet sent from the server to the client.

- **H**

  The cookie of the packet. Note: previous versions of this man page (and the NBD spec) referred to the cookie as the "handle".

- **C**

  The command sent.

- **O**

  The offet from the start of the disk.

- **L**

  The length of data.

- **E**

  The error returned.

- **T**

  The type of the structured reply message.

- **F**

  The flags on the structured reply message.

## SEE ALSO

nbd-server (1).

## AUTHOR

The NBD kernel module and the NBD tools have been written by Pavel Macheck (pavel@ucw.cz).

The kernel module is now maintained by Paul Clements (Paul.Clements@steeleye.com), while the userland tools are maintained by Wouter Verhelst (wouter@debian.org)

This manual page was written by Wouter Verhelst (\<wouter@debian.org\>) for the Debian GNU/Linux system (but may be used by others).  Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, version 2, as published by the Free Software Foundation.