TRUNCATE manpage

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TRUNCATE(1)			 User Commands			   TRUNCATE(1)

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

       truncate OPTION... FILE...

       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

       -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

	      output version information and exit

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

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

       Written by Padraig Brady.

       Copyright (C) 2013 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.

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

       The full documentation for truncate is maintained as a Texinfo  manual.
       If  the info and truncate programs are properly installed at your site,
       the command

	      info coreutils 'truncate invocation'

       should give you access to the complete manual.

GNU coreutils 8.22		 February 2016			   TRUNCATE(1)