truncate
shrink or extend the size of a file to the specified size
see also :
dd
Synopsis
truncate
OPTION... FILE...
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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
--help
display this help and exit
--version
output version information and
exit
SIZE is an
integer and optional unit (example: 10M is 10*1024*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.
copyright
Copyright © 2012 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.
reporting bugs
Report truncate bugs to bug-coreutils[:at:]gnu[:dot:]org
GNU coreutils home page:
<http://www.gnu.org/software/coreutils/>
General help using GNU software:
<http://www.gnu.org/gethelp/>
Report truncate translation bugs to
<http://translationproject.org/team/>
see also
dd ,
truncate, ftruncate
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 'truncate invocation'
should give you
access to the complete manual.
author
Written by
Padraig Brady.