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truncate: add page (#2196)

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Felix Yan 2018-07-15 17:24:57 +08:00 • committed by Starbeamrainbowlabs
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# truncate
> Shrink or extend the size of a file to the specified size.
- Set a size of 10 GB to an exsting file, or create a new file with the specified size:
`truncate -s {{10G}} {{filename}}`
- Extend the file size by 50M, fill with holes (which reads as zero bytes):
`truncate -s +{{50M}} {{filename}}`
- Shrink the file by 2GiB, by removing data from the end of file:
`truncate -s -{{2G}} {{filename}`