Believe me... I do not debate the dubious value of
/usr/bin/cd. I'm only hopeing someone actually knows
why it exists. I do not believe it was a joke. The only other
possibility I can think of would be that it may act similar
to sourcing a file containing environemnt variables.
create a file called .testthis
with one line...
...then from your home directory do
...for the remainder of that shell session, HOME will be /tmp.
Again reasons for doing this are dubious at best but maybe
someone out there can shed some light on the reason for