TRUNCATE(1) User Commands TRUNCATE(1)
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
do not create any files
treat SIZE as number of IO blocks instead of bytes
base size on RFILE
set or adjust the file size by SIZE bytes
–help display this help and exit
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).
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:
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Copyright © 2016 Free Software Foundation, Inc. License GPLv3+: GNU
GPL version 3 or later
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Full documentation at:
or available locally via: info ‘(coreutils) truncate invocation’
GNU coreutils 8.25 February 2016 TRUNCATE(1)