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truncate(1)


NAME

   truncate - shrink or extend the size of a file to the specified size

SYNOPSIS

   truncate OPTION... FILE...

DESCRIPTION

   Shrink or extend the size of each FILE to the specified size

   A FILE argument that does not exist is created.

   If  a  FILE  is larger than the specified size, the extra data is lost.
   If a FILE is shorter, it is extended and the extended part (hole) reads
   as zero bytes.

   Mandatory  arguments  to  long  options are mandatory for short options
   too.

   -c, --no-create
          do not create any files

   -o, --io-blocks
          treat SIZE as number of IO blocks instead of bytes

   -r, --reference=RFILE
          base size on RFILE

   -s, --size=SIZE
          set or adjust the file size by SIZE bytes

   --help display this help and exit

   --version
          output version information and exit

   The SIZE argument is an integer and  optional  unit  (example:  10K  is
   10*1024).   Units  are  K,M,G,T,P,E,Z,Y  (powers  of 1024) or KB,MB,...
   (powers of 1000).

   SIZE may also be prefixed by one of the following modifying characters:
   '+' extend by, '-' reduce by, '<' at most, '>' at least, '/' round down
   to multiple of, '%' round up to multiple of.

AUTHOR

   Written by Padraig Brady.

REPORTING BUGS

   GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
   Report          truncate          translation          bugs          to
   <http://translationproject.org/team/>

COPYRIGHT

   Copyright    2016  Free Software Foundation, Inc.  License GPLv3+: GNU
   GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
   This is free software: you are free  to  change  and  redistribute  it.
   There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

   dd(1), truncate(2), ftruncate(2)

   Full documentation at: <http://www.gnu.org/software/coreutils/truncate>
   or available locally via: info '(coreutils) truncate invocation'



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