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 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/>
Written by Padraig Brady.
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.
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.