Section: User Commands (1)
Updated: April 2010
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truncate - shrink or extend the size of a file to the specified size
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=FILE
use this FILE's size
- -s, --size=SIZE
use this SIZE
display this help and exit
output version information and exit
SIZE may be (or may be an integer optionally followed by) one of following:
KB 1000, K 1024, MB 1000*1000, M 1024*1024, and so on for G, T, P, E, Z, Y.
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.
Note that the -r and -s options are mutually exclusive.
Written by Padraig Brady.
Report truncate bugs to firstname.lastname@example.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/>
Copyright © 2010 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.
dd(1), truncate(2), ftruncate(2)
The full documentation for
is maintained as a Texinfo manual. If the
programs are properly installed at your site, the command
info coreutils 'truncate invocation'
should give you access to the complete manual.
- REPORTING BUGS
- SEE ALSO
This document was created by
using the manual pages.