truncate(1) - Linux man page
Name
truncate - shrink or extend the size of a file to the specified sizeSynopsis
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=FILE
- use this FILE's size
- -s, --size=SIZE
- use this 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.
Note that the -r and -s options are mutually exclusive.
Author
Written by Padraig Brady.Reporting Bugs
Report truncate bugs to bug-coreutils@gnu.orgGNU 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 © 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.
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.