Manual: gnutruncate

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 multiple of, '%' round up to multiple of.

AUTHOR
       Written by Padraig Brady.

REPORTING BUGS
       GNU coreutils online help: 
       Report any translation bugs to 

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

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

       Packaged by Ubuntu (9.7-3ubuntu2)
       Copyright © 2025 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.

GNU coreutils 9.7					January 2026						 TRUNCATE(1)