TRUNCATE(1) | User Commands | TRUNCATE(1) |
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
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.
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 © 2013 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.
November 2020 | GNU coreutils 8.22 |