Section: User Commands (1)
Updated: March 2019
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truncate - shrink or extend the size of a file to the specified size
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
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).
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 © 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.
Full documentation <https://www.gnu.org/software/coreutils/truncate>
or available locally via: info '(coreutils) truncate invocation'