.\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.50.1.
.TH TRUNCATE "1" "July 2026" "GNU coreutils 9.11" "User Commands"
.SH NAME
truncate \- shrink or extend the size of a file to the specified size
.SH SYNOPSIS
.B truncate
\fI\,OPTION\/\fR... \fI\,FILE\/\fR...
.SH DESCRIPTION
.\" Add any additional description here
.PP
Shrink or extend the size of each FILE to the specified size
.PP
A FILE argument that does not exist is created.
.PP
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.
.PP
Mandatory arguments to long options are mandatory for short options too.
.TP
\X'tty: link https://www.gnu.org/software/coreutils/manual/coreutils.html#truncate-c'\fB\-c, \-\-no\-create\fP\X'tty: link'
do not create any files
.TP
\X'tty: link https://www.gnu.org/software/coreutils/manual/coreutils.html#truncate-o'\fB\-o, \-\-io\-blocks\fP\X'tty: link'
treat SIZE as number of IO blocks instead of bytes
.TP
\X'tty: link https://www.gnu.org/software/coreutils/manual/coreutils.html#truncate-r'\fB\-r, \-\-reference=\,RFILE\fP\X'tty: link'\/\fR
base size on RFILE
.TP
\X'tty: link https://www.gnu.org/software/coreutils/manual/coreutils.html#truncate-s'\fB\-s, \-\-size=\,SIZE\fP\X'tty: link'\/\fR
set or adjust the file size by SIZE bytes
.TP
\X'tty: link https://www.gnu.org/software/coreutils/truncate#truncate--help'\fB\-\-help\fP\X'tty: link'
display this help and exit
.TP
\X'tty: link https://www.gnu.org/software/coreutils/truncate#truncate--version'\fB\-\-version\fP\X'tty: link'
output version information and exit
.PP
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.
.PP
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.
.SH AUTHOR
Written by Padraig Brady.
.SH "REPORTING BUGS"
Report bugs to: bug\-coreutils@gnu.org
.br
GNU coreutils home page: <https://www.gnu.org/software/coreutils/>
.br
General help using GNU software: <https://www.gnu.org/gethelp/>
.br
Report any translation bugs to <https://translationproject.org/team/>
.SH COPYRIGHT
Copyright \(co 2026 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
.br
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
.SH "SEE ALSO"
\fBdd\fP(1), \fBtruncate\fP(2), \fBftruncate\fP(2)
.PP
.br
Full documentation <https://www.gnu.org/software/coreutils/truncate>
.br
or available locally via: info \(aq(coreutils) truncate invocation\(aq