Update cheatsheets

linux/fallocate

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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 --length {{700M}} {{path/to/file}}`
+
+- Shrink an already allocated file by 200 MiB:
+
+`fallocate --collapse-range --length {{200M}} {{path/to/file}}`
+
+- Shrink 20 MB of space after 100 MiB in a file:
+
+`fallocate --collapse-range --offset {{100M}} --length {{20M}} {{path/to/file}}`