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TRUNCATE(1)				  User Commands 			      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=FILE
	      use this FILE's size

       -s, --size=SIZE
	      use this SIZE

       --help display this help and exit

       --version
	      output version information and exit

       SIZE may be (or may be an integer optionally followed by) one of  following:  KB  1000,	K
       1024, MB 1000*1000, M 1024*1024, and so on for G, T, P, E, Z, Y.

       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  mul-
       tiple of.

       Note that the -r and -s options are mutually exclusive.

AUTHOR
       Written by Padraig Brady.

REPORTING BUGS
       Report truncate bugs to bug-coreutils@gnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>
       Report truncate translation bugs to <http://translationproject.org/team/>

COPYRIGHT
       Copyright  (C)  2010  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)

       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 8.5			  February 2011 			      TRUNCATE(1)
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