Use of sfill -l ~; is it actually doing anything?

[Ralf Mardorf]

PS:

On Wed, 16 Oct 2019 12:24:31 +0200, Ralf Mardorf wrote:
>https://askubuntu.com/questions/961558/how-to-know-the-progress-of-sfill-free-space-wiping-process

Please do not ignore the link "probably a waste of time" ( https://www.howtogeek.com/115573/htg-explains-why-you-only-have-to-wipe-a-disk-once-to-erase-it/ )
provided by the above link.