truncate(1) — Linux manual page


TRUNCATE(1)                   User Commands                  TRUNCATE(1)

NAME         top

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

SYNOPSIS         top

       truncate OPTION... FILE...

DESCRIPTION         top

       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

              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,R,Q (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

AUTHOR         top

       Written by Padraig Brady.

REPORTING BUGS         top

       GNU coreutils online help:
       Report any translation bugs to

COPYRIGHT         top

       Copyright © 2024 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.

SEE ALSO         top

       dd(1), truncate(2), ftruncate(2)

       Full documentation
       or available locally via: info '(coreutils) truncate invocation'

COLOPHON         top

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GNU coreutils 9.5              March 2024                    TRUNCATE(1)

Pages that refer to this page: fallocate(1)truncate(2)swapon(8)