Linux Commands Examples

A great documentation place for Linux commands


shrink or extend the size of a file to the specified size

see also : dd


truncate OPTION... FILE...

add an example, a script, a trick and tips

: email address (won't be displayed)
: name

Step 2

Thanks for this example ! - It will be moderated and published shortly.

Feel free to post other examples
Oops ! There is a tiny cockup. A damn 404 cockup. Please contact the loosy team who maintains and develops this wonderful site by clicking in the mighty feedback button on the side of the page. Say what happened. Thanks!


no example yet ...

... Feel free to add your own example above to help other Linux-lovers !


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.
, --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


display this help and exit


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.


Copyright © 2012 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.

reporting bugs

Report truncate bugs to bug-coreutils[:at:]gnu[:dot:]org
GNU coreutils home page: <>
General help using GNU software: <>
Report truncate translation bugs to <>

see also

dd , truncate, ftruncate

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.


Written by Padraig Brady.

How can this site be more helpful to YOU ?

give  feedback