truncate - shrink or extend the size of a file to the specified size
truncate OPTION...
FILE...
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 sparse 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
The SIZE argument is an integer and optional unit (example: 10K is 10*1024).
Units are K,M,G,T,P,E,Z,Y (powers of 1024) or KB,MB,... (powers of 1000).
Binary prefixes can be used, too: KiB=K, MiB=M, and so on.
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.
Written by Padraig Brady.
GNU coreutils online help: <
https://www.gnu.org/software/coreutils/>
Report any translation bugs to <
https://translationproject.org/team/>
Copyright © 2022 Free Software Foundation, Inc. License GPLv3+: GNU GPL
version 3 or later <
https://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)
Full documentation <
https://www.gnu.org/software/coreutils/truncate>
or available locally via: info '(coreutils) truncate invocation'