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TRUNCATE

Section: User Commands (1)
Updated: July 2014
Index Return to Main Contents
 

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 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 (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.

GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report truncate translation bugs to <http://translationproject.org/team/>  

AUTHOR

Written by Padraig Brady.  

COPYRIGHT

Copyright © 2014 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://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)

The full documentation for truncate is maintained as a Texinfo manual. If the info and truncate programs are properly installed at your site, the command

info coreutils aqtruncate invocationaq

should give you access to the complete manual.


 

Index

NAME
SYNOPSIS
DESCRIPTION
AUTHOR
COPYRIGHT
SEE ALSO


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