---
name: "jfs_fscklog"
section: "8"
platform: "linux"
package: "jfsutils"
version: "1.1.15-9"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/jfs_fscklog"
---

# jfs\_fscklog(8)

extract a JFS fsck service log into a file and/or format and display the extracted file

## NAME

**jfs\_fscklog** - extract a JFS fsck service log into a file and/or format and display the extracted file

## SYNOPSIS

**jfs\_fscklog** \[ **-d** \] \[ **-e** *device* \] \[ **-f** *output.file* \] \[ **-p** \] \[ **-V** \]

## DESCRIPTION

**jfs\_fscklog** with option **-e** *device* extracts the contents of either the most recent or immediately prior (specified with option **-p**) JFS fsck service log from the specified device, and writes the output to a file.  The file name may be specified with the **-f** option, or the default file name is *\<pwd\>fscklog.new*. If the **-p** option is used, the default file name is *\<pwd\>fscklog.old*.

**jfs\_fscklog** with option **-d** formats and displays the contents of the extracted file.

**jfs\_fscklog** with options **-d** and **-e** *device* extracts and displays the JFS fsck service log.

## OPTIONS

- **-d**

  Format and display a previously extracted JFS fsck service log.

- **-e** *device*

  Extract the JFS fsck service log from *device* and store it in a file. (*device* is the special file name corresponding to the actual device from which the fsck log will be extracted (e.g. **/dev/hdb1** )).

- **-f** *file.name*

  Specify the file name, overriding the default file name.  When used with **-e** *device*, file.name specifies the name of the file into which the JFS fsck log will be extracted. When used with **-d**, file.name specifies the name of the extracted file whose contents will be formatted and displayed.

  *file.name* must be 127 characters or less in length.

  *file.name* will be created in the present working directory unless it is fully qualified.

- **-p**

  Extract the prior log (as opposed to the most recent log).

- **-V**

  Print version information and exit (regardless of any other chosen options).

## EXAMPLES

 Extract the most recent JFS fsck log on /dev/hda5 into *\<pwd\>fscklog.new*:

-

  **jfs\_fscklog -e /dev/hda5**

-

  Extract the most recent JFS fsck log on /dev/hdb3 into */temp/l9651107.log*:

-

  **jfs\_fscklog -e /dev/hdb3 -f /temp/l9651107.log**

-

  Display the JFS fsck log that was extracted into */temp/l9651107.log*:

-

  **jfs\_fscklog -d -f /temp/l9651107.log**

-

  Extract and display the previous JFS fsck log from /dev/hda8:

-

  **jfs\_fscklog -e /dev/hda8 -d -p**

-

  ## REPORTING BUGS

If you find a bug in **JFS** or **jfs\_fscklog,** please report it via the bug tracking system ("Report Bugs" section) of the JFS project web site:

```
http://jfs.sourceforge.net/
```

Please send as much pertinent information as possible, including any **jfs\_fscklog** error messages and the complete output of running **jfs\_fsck** with the **-v** option on the JFS device.

## SEE ALSO

[**jfs\_fsck**(8)](/jfs_fsck/8.md), [**jfs\_mkfs**(8)](/jfs_mkfs/8.md), [**jfs\_tune**(8)](/jfs_tune/8.md), [**jfs\_logdump**(8)](/jfs_logdump/8.md), [**jfs\_debugfs**(8)](/jfs_debugfs/8.md)

## AUTHOR

```
Barry Arndt  (barndt@us.ibm.com)
```

**jfs\_fscklog** is maintained by IBM.

```
See the JFS project web site for more details:
http://jfs.sourceforge.net/
```