> One of the downsides of the Linux cp command, is copying a file larger than RAM will destroy every existing entry in the file cache. Under normal circumstances this is a good thing, since a least recently used strategy usually works. However it can be problematic if you're just organizing your files on a production system where you don't want to disrupt performance. As far as I know, no standard command line utility offers a way to exploit this functionality.

I think `dd` in conjunction with the `oflag=direct` has this functionality. See: https://stackoverflow.com/questions/33485108/why-is-dd-with-...