NTFSTRUNCATE(8)             System Manager's Manual            NTFSTRUNCATE(8)

       ntfstruncate - truncate a file on an NTFS volume

       ntfstruncate [options] device file [attr-type [attr-name]] new-length

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

       Below is a summary  of  all  the  options  that  ntfstruncate  accepts.
       Nearly  all  options have two equivalent names.  The short name is pre-
       ceded 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     Display licensing information.

       -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.

              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 attribute has to be  speci-
              fied 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" |

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

              Specify the target size of the file.  It will be rounded up to a
              multiple  of  the  cluster 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
              appended to mean a multiplicative factor of a power of 1024.

       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

       There  are  no  known  problems  with ntfstruncate.  If you find a bug,
       please send an email describing the problem to the development team:

       ntfstruncate was written by Anton Altaparmakov.

       ntfstruncate is part of the ntfs-3g package and is available from:

       ntfs-3g(8), ntfsfallocate(8), ntfsprogs(8).

ntfs-3g 2017.3.23                  June 2014                   NTFSTRUNCATE(8)
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