CmdID

CmdID / Commands

sync

Write pending cached data to disk (synchronize), blocking until done. toybox

On Linux, macOS

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Linux

from the toybox, 0BSD
sync

Linux

from tldr-pages, CC BY 4.0

Flush all pending write operations to the appropriate disks.

Flush all pending write operations on all disks

Flush all pending write operations on a single file to disk

sync path/to/fileIdentify

Flush writes and drop filesystem caches

sync; echo 3 | sudo tee /proc/sys/vm/drop_cachesIdentify

macOS

from tldr-pages, CC BY 4.0

Flush all pending write operations to the appropriate disks.

Flush all pending write operations on all disks

Flush all pending write operations on a single file to disk

sync path/to/fileIdentify

Flush disk writes and attempt to clear inactive memory and filesystem caches

sync; sudo purgeIdentify