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
- --help
- display this help and exit
- --version
- 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.
AUTHOR¶
Written by Padraig Brady.
REPORTING BUGS¶
Report truncate bugs to bug-coreutils@gnu.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¶
Copyright © 2011 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 'truncate invocation'
should give you access to the complete manual.