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 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.
GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
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Copyright 2019 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.
Written by Padraig Brady.