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 sparse 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 bytes

     --help
	    display this help and exit

     --version
	    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,R,Q  (powers	of  1024)  or  KB,MB,...
     (powers  of  1000).  Binary prefixes can be used, too: KiB=K, MiB=M, and so
     on.

     SIZE may also be prefixed by one of the following modifying characters: '+'
     extend by, '-' reduce by, '<' at most, '>' at least, '/' round down to mul-
     tiple of, '%' round up to multiple of.

AUTHOR
     Written by Padraig Brady.

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

COPYRIGHT
     Copyright (C) 2026 Free Software Foundation, Inc.	License GPLv3+: GNU  GPL
     version 3 or later <https://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)

     Full documentation <https://www.gnu.org/software/coreutils/truncate>
     or available locally via: info '(coreutils) truncate invocation'

GNU coreutils 9.11		   April 2026			     TRUNCATE(1)