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

       --help display this help and exit

       --version
              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, ... (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

       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  ©  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.

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.