---
name: "debugfs.reiser4"
section: "8"
platform: "linux"
package: "reiser4progs"
version: "1.2.2-1+b1"
release: "Debian 12 (Bookworm)"
platforms: ["linux"]
url: "https://new.carta.tech/debugfs.reiser4"
---

# debugfs.reiser4(8)

the program for debugging reiser4 filesystem.

## NAME

debugfs.reiser4 - the program for debugging reiser4 filesystem.

## SYNOPSIS

**debugfs.reiser4** \[ options \] FILE

## DESCRIPTION

**debugfs.reiser4** is reiser4 filesystem debug program. You can disscover the internal reiser4 filesystem structures by using it.

## COMMON OPTIONS

- **-V, --version**

  prints program version.

- **-?, -h, --help**

  prints program help.

- **-y, --yes**

  assumes an answer 'yes' to all questions.

- **-f, --force**

  forces debugfs to use whole disk, not block device or mounted partition.

- **-c, --cache N**

  sets tree cache node number to passed value. This affects very much behavior of libreiser4. It affects speed, tree allocation, etc.

## BROWSING OPTIONS

- **-k, --cat**

  browses passed file like standard cat and ls programs.

## PRINT OPTIONS

- **-t, --print-tree**

  prints the internal tree.

- **-b, --print-block N**

  prints the block associated with the passed block number.

- **-n, --print-nodes FILE**

  prints all nodes that the passed file lies in.

- **-i, --print-file**

  prints all items that the passed file consists of.

- **-s, --print-super**

  prints the both super blocks: master super block and format specific one.

- **-j, --print-journal**

  prints the journal with not yet commited transactions (if any).

- **-a, --print-alloc**

  prints the block allocator data.

- **-d, --print-oid**

  prints the oid allocator data.

## METADATA OPTIONS

- **-P, --pack-metadata**

  fetches filesystem metadata and writes them to the standard output.

- **-U, --unpack-metadata**

  reads filesystem metadata stream from the stdandard input and constructs  a new filesystem based on the metadata. debugfs.reiser4 --pack-metadata \<FS1\> \|  debugfs.reiser4 --unpack-metadata \<FS2\> and then debugfs.reiser4 --pack-metadata  \<FS2\> produces a stream equivalent to the first one.

## PLUGIN OPTIONS

- **-p, --print-profile**

  prints the plugin profile. This is the set of default plugins used for all parts of a filesystem -- format, nodes, files, directories, hashes, etc. If --override is specified, then prints modified plugins.

- **-l, --print-plugins**

  prints all plugins libreiser4 knows about.

- **-o, --override TYPE=PLUGIN, ...**

  overrides the default plugin of the type "TYPE" by the plugin "PLUGIN" in the plugin profile.

## Examples:

debugfs.reiser4 -o nodeptr=nodeptr41,hash=rupasov\_hash /dev/hda2

## REPORTING BUGS

Report bugs to \<reiserfs-devel@vger.kernel.org\>

## SEE ALSO

**[measurefs.reiser4(8)](/measurefs.reiser4/8.md),** **[mkfs.reiser4(8)](/mkfs.reiser4/8.md),** **[fsck.reiser4(8)](/fsck.reiser4/8.md)**

## AUTHOR

This manual page was written by Yury Umanets \<umka@namesys.com\>