CmdID

CmdID / Commands

fallocate

Tell the filesystem to allocate space for a range in a file. toybox

On Linux

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Linux

from the toybox, 0BSD
fallocate [-o OFFSET] -l SIZE FILE
-lNumber of bytes in range
-o OFFSETStart offset of range (default 0)

Linux

from tldr-pages, CC BY 4.0

Reserve or deallocate disk space to files. The utility allocates space without zeroing.

Reserve a file taking up 700 MiB of disk space

fallocate --length 700M path/to/fileIdentify

Shrink an already allocated file by 200 MB

fallocate --collapse-range --length 200MB path/to/fileIdentify

Shrink 20 MB of space after 100 MiB in a file

fallocate --collapse-range --offset 100M --length 20M path/to/fileIdentify