# NTFSTRUNCATE - truncate a file on an NTFS volume - man(8) - [phpMan]

[_NTFSTRUNCATE_(8)](https://www.chedong.com/phpMan.php/man/NTFSTRUNCATE/8/markdown)                        System Manager's Manual                       [_NTFSTRUNCATE_(8)](https://www.chedong.com/phpMan.php/man/NTFSTRUNCATE/8/markdown)

## NAME
       ntfstruncate - truncate a file on an NTFS volume

## SYNOPSIS
       **ntfstruncate **[_options_] _device_ _file_ _[attr-type_ [_attr-name_]] _new-length_

## DESCRIPTION
       **ntfstruncate  **truncates  (or extends) a specified attribute belonging to a file or directory,
       to a specified length.

## OPTIONS
       Below is a summary of all the options that **ntfstruncate **accepts.  Nearly all options have two
       equivalent names.  The short name is preceded by **- **and the long name is preceded by **--**.   Any
       single  letter  options,  that don't take an argument, can be combined into a single command,
       e.g.  **-fv **is equivalent to **-f -v**.  Long named options can be abbreviated to any unique prefix
       of their name.

### -f --force
              This will override some sensible defaults, such as not using a  mounted  volume.   Use
              this option with caution.

### -h --help
              Show a list of options with a brief description of each one.

### -l     

### -n --no-action
              Simulate the truncation without actually write to device.

### -q --quiet
              Suppress some debug/warning/error messages.

### -v --verbose
              Display more debug/warning/error messages.

### -V --version
              Show the version number, copyright and license of **ntfstruncate**.

### attr-type
              Define  a  particular attribute type to be truncated (advanced use only).  By default,
              the unnamed $DATA attribute (the contents of a plain file) will be truncated. The  at‐
              tribute has to be specified by a number in decimal or hexadecimal :
              ┌────────────────────────────────────────────┐
              │ **Hex     Decimal   Name                     **│
              │ 0x10    16        "$STANDARD_INFORMATION"  │
              │ 0x20    32        "$ATTRIBUTE_LIST"        │
              │ 0x30    48        "$FILE_NAME"             │
              │ 0x40    64        "$OBJECT_ID"             │
              │ 0x50    80        "$SECURITY_DESCRIPTOR"   │
              │ 0x60    96        "$VOLUME_NAME"           │
              │ 0x70    112       "$VOLUME_INFORMATION"    │
              │ 0x80    128       "$DATA"                  │
              │ 0x90    144       "$INDEX_ROOT"            │
              │ 0xA0    160       "$INDEX_ALLOCATION"      │
              │ 0xB0    176       "$BITMAP"                │
              │ 0xC0    192       "$REPARSE_POINT"         │
              │ 0xD0    208       "$EA_INFORMATION"        │
              │ 0xE0    224       "$EA"                    │
              │ 0xF0    240       "$PROPERTY_SET"          │
              │ 0x100   256       "$LOGGED_UTILITY_STREAM" │
              └────────────────────────────────────────────┘


### attr-name
              Define the name of the particular attribute type to be truncated (advanced use only).


### new-length
              Specify the target size of the file.  It will be rounded up to a multiple of the clus‐
              ter  size.   A  suffix  of K, M, G, T, P or E may be appended to mean a multiplicative
              factor of a power of 1000. Similarly a suffix of Ki, Mi, Gi, Ti, Pi or Ei may  be  ap‐
              pended to mean a multiplicative factor of a power of 1024.

## EXAMPLES
       Resize to 100MB the file database.db located in the Data directory which is at the root of an
       NTFS file system.

              **ntfstruncate /dev/sda1 Data/database.db 100M**


## BUGS
       There  are  no known problems with **ntfstruncate**.  If you find a bug, please send an email de‐
       scribing the problem to the development team:
       <ntfs-3g-devel@lists.sf.net>

## AUTHORS
       **ntfstruncate **was written by Anton Altaparmakov.

## AVAILABILITY
       **ntfstruncate **is part of the **ntfs-3g **package and is available from:
       <https://github.com/tuxera/ntfs-3g/wiki/>

## SEE ALSO
       [**ntfs-3g**(8)](https://www.chedong.com/phpMan.php/man/ntfs-3g/8/markdown), [**ntfsfallocate**(8)](https://www.chedong.com/phpMan.php/man/ntfsfallocate/8/markdown), [**ntfsprogs**(8)](https://www.chedong.com/phpMan.php/man/ntfsprogs/8/markdown).

ntfs-3g 2022.10.3                             June 2014                              [_NTFSTRUNCATE_(8)](https://www.chedong.com/phpMan.php/man/NTFSTRUNCATE/8/markdown)