1TRUNCATE(1)                      User Commands                     TRUNCATE(1)
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NAME

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

9       truncate OPTION... FILE...
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DESCRIPTION

12       Shrink or extend the size of each FILE to the specified size
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14       A FILE argument that does not exist is created.
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16       If  a  FILE  is larger than the specified size, the extra data is lost.
17       If a FILE is shorter, it is extended and the extended part (hole) reads
18       as zero bytes.
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20       Mandatory  arguments  to  long  options are mandatory for short options
21       too.
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23       -c, --no-create
24              do not create any files
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26       -o, --io-blocks
27              treat SIZE as number of IO blocks instead of bytes
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29       -r, --reference=FILE
30              use this FILE's size
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32       -s, --size=SIZE
33              use this SIZE
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35       --help display this help and exit
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37       --version
38              output version information and exit
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40       SIZE may be (or may be an integer optionally followed by) one  of  fol‐
41       lowing: KB 1000, K 1024, MB 1000*1000, M 1024*1024, and so on for G, T,
42       P, E, Z, Y.
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44       SIZE may also be prefixed by one of the following modifying characters:
45       `+' extend by, `-' reduce by, `<' at most, `>' at least, `/' round down
46       to multiple of, `%' round up to multiple of.
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48       Note that the -r and -s options are mutually exclusive.
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AUTHOR

51       Written by Padraig Brady.
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REPORTING BUGS

54       Report truncate bugs to bug-coreutils@gnu.org
55       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
56       General help using GNU software: <http://www.gnu.org/gethelp/>
57       Report   truncate   translation   bugs    to    <http://translationpro‐
58       ject.org/team/>
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61       Copyright  ©  2010  Free Software Foundation, Inc.  License GPLv3+: GNU
62       GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
63       This is free software: you are free  to  change  and  redistribute  it.
64       There is NO WARRANTY, to the extent permitted by law.
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SEE ALSO

67       dd(1), truncate(2), ftruncate(2)
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69       The  full documentation for truncate is maintained as a Texinfo manual.
70       If the info and truncate programs are properly installed at your  site,
71       the command
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73              info coreutils 'truncate invocation'
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75       should give you access to the complete manual.
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79GNU coreutils 8.5                November 2010                     TRUNCATE(1)
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