If I try
du -s -h -x /*
it will try to examine all filesystems (real and pseudo) mounted directly under /, e.g. /dev, /proc, /sys, /run, and /home (/home is on an extra partition).
I think it comes from the shell expansion of *, giving du a parameter list that explicitly includes these mount points.
Is there a way to make du not examine mounted filesystems, even when the mount points are contained in the parameter list ?
I really don't want to type all subdirs of / just to avoid them being in the parameter list.