User Commands                                         TRUNCATE(1)



NAME
     truncate - shrink or extend the size of a file to the speci-
     fied 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
     multiple of.

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

AUTHOR
     Written by Padraig Brady.





GNU coreutils 8.5    Last change: April 2010                    1






User Commands                                         TRUNCATE(1)



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  redistri-
     bute  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  Tex-
     info 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    Last change: April 2010                    2