1TRUNCATE(1) User Commands TRUNCATE(1)
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6 truncate - shrink or extend the size of a file to the specified size
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9 truncate OPTION... FILE...
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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=RFILE
30 base size on RFILE
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32 -s, --size=SIZE
33 set or adjust the file size by SIZE bytes
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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 The SIZE argument is an integer and optional unit (example: 10K is
41 10*1024). Units are K,M,G,T,P,E,Z,Y (powers of 1024) or KB,MB,...
42 (powers of 1000).
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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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49 Written by Padraig Brady.
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52 GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
53 Report truncate translation bugs to <https://translationpro‐
54 ject.org/team/>
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57 Copyright © 2018 Free Software Foundation, Inc. License GPLv3+: GNU
58 GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
59 This is free software: you are free to change and redistribute it.
60 There is NO WARRANTY, to the extent permitted by law.
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63 dd(1), truncate(2), ftruncate(2)
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65 Full documentation at: <https://www.gnu.org/software/coreutils/trun‐
66 cate>
67 or available locally via: info '(coreutils) truncate invocation'
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71GNU coreutils 8.30 July 2018 TRUNCATE(1)