Name
truncate - shrink or extend the size of a file to the specified sizeSynopsis
truncate \,OPTION\/... \,FILE\/...Description
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.
Author
Written by Padraig Brady.Reporting Bugs
GNU coreutils online help: <https://www.gnu.org/software/coreutils/> Report any translation bugs to <https://translationproject.org/team/>Copyright
Copyright © 2020 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.See Also
dd(1), truncate(2), ftruncate(2)Full documentation <https://www.gnu.org/software/coreutils/truncate> or available locally via: info \(aq(coreutils) truncate invocation\(aq