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cheatsheet-tldr/tldr/linux/fallocate
2026-02-13 00:29:55 +00:00

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---
syntax: markdown
tags: [tldr, linux]
source: https://github.com/tldr-pages/tldr.git
---
# fallocate
> Reserve or deallocate disk space to files.
> The utility allocates space without zeroing.
> More information: <https://manned.org/fallocate>.
- Reserve a file taking up 700 MiB of disk space:
`fallocate {{[-l|--length]}} 700M {{path/to/file}}`
- Shrink an already allocated file by 200 MB:
`fallocate {{[-c|--collapse-range]}} {{[-l|--length]}} 200MB {{path/to/file}}`
- Shrink 20 MB of space after 100 MiB in a file:
`fallocate {{[-c|--collapse-range]}} {{[-o|--offset]}} 100M {{[-l|--length]}} 20M {{path/to/file}}`