why can't i see *all* mounts with "mount"?

  i'm curious as to why the "mount" command won't show me all the
mounts that i can view via /proc/mounts.  for example, "mount" doesn't
show me the usbfs mount, or the selinuxfs mount, or ... well, you get
the idea.

  were these mount types left out of the output of mount for a reason?
just curious.

rday
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Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry:
    Have classroom, will lecture.

http://crashcourse.ca                          Waterloo, Ontario, CANADA
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