TRUNCATE(1)                     User Commands                    TRUNCATE(1)

NAME         top

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

SYNOPSIS         top

       truncate OPTION... FILE...

DESCRIPTION         top

       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

       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         top

       Written by Padraig Brady.

REPORTING BUGS         top

       GNU coreutils online help: <>
       Report truncate translation bugs to

COPYRIGHT         top

       Copyright © 2017 Free Software Foundation, Inc.  License GPLv3+: GNU
       GPL version 3 or later <>.
       This is free software: you are free to change and redistribute it.
       There is NO WARRANTY, to the extent permitted by law.

SEE ALSO         top

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

       Full documentation at:
       or available locally via: info '(coreutils) truncate invocation'

COLOPHON         top

       This page is part of the coreutils (basic file, shell and text
       manipulation utilities) project.  Information about the project can
       be found at ⟨⟩.  If you have a
       bug report for this manual page, see
       ⟨⟩.  This page was obtained
       from the tarball coreutils-8.29.tar.xz fetched from
       ⟨⟩ on 2018-02-02.  If you discover
       any rendering problems in this HTML version of the page, or you
       believe there is a better or more up-to-date source for the page, or
       you have corrections or improvements to the information in this
       COLOPHON (which is not part of the original manual page), send a mail

GNU coreutils 8.29              December 2017                    TRUNCATE(1)

Pages that refer to this page: fallocate(1)truncate(2)