# TRUNCATE(1) - man - phpMan

[TRUNCATE(1)](https://www.chedong.com/phpMan.php/man/TRUNCATE/1/markdown)                                 User Commands                                [TRUNCATE(1)](https://www.chedong.com/phpMan.php/man/TRUNCATE/1/markdown)



## 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
              base size on RFILE

### -s --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 (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: <<https://www.gnu.org/software/coreutils/>>
       Report any translation bugs to <<https://translationproject.org/team/>>

## COPYRIGHT
       Copyright © 2020 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)](https://www.chedong.com/phpMan.php/man/dd/1/markdown), [truncate(2)](https://www.chedong.com/phpMan.php/man/truncate/2/markdown), [ftruncate(2)](https://www.chedong.com/phpMan.php/man/ftruncate/2/markdown)

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



GNU coreutils 8.32                          January 2026                                 [TRUNCATE(1)](https://www.chedong.com/phpMan.php/man/TRUNCATE/1/markdown)