[CentOS] claiming unsused space back

Mon Jul 31 16:45:20 UTC 2017
Chris Adams <linux at cmadams.net>

Once upon a time, Warren Young <warren at etr-usa.com> said:
> Zeroing the free space not only prevents inclusion of these discarded FS blocks, they compress better, too.

Check out the "virt-sparsify" command - it does all of this for you.
-- 
Chris Adams <linux at cmadams.net>