I read this up on this website and it doesn't make sense.
When UNIX was first written,
/usr/binphysically resided on two different disks:
/binbeing on a smaller faster (more expensive) disk, and
/usr/binon a bigger slower disk. Now,
/binis a symbolic link to
/usr/bin: they are essentially the same directory.
But when you
/bin folder, it has far less content than the
/usr/bin folder (at least on my running system).
So can someone please explain the difference?