NTFSTRUNCATE(8) System Manager's Manual NTFSTRUNCATE(8) 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 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. attr-type Define a particular attribute type to be truncated (advanced use only). By default, the unnamed $DATA attribute (the contents of a plain file) will be truncated. The attribute has to be specified by a number in decimal or hexadecimal : +--------------------------------------------+ | Hex Decimal Name | | 0x10 16 "$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 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. Simi- larly a suffix of Ki, Mi, Gi, Ti, Pi or Ei may be appended 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 describing 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), ntfsfallocate(8), ntfsprogs(8). ntfs-3g 2022.10.3 June 2014 NTFSTRUNCATE(8)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | BUGS | AUTHORS | AVAILABILITY | SEE ALSO
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