I've been using Unix machines and pushd since the mid 1990s and just learned this as well. All those wasted years... Some examples here: http://en.wikipedia.o

I've been using Unix machines and pushd since the mid 1990s and just learned this as well. All those wasted years... Some examples here: http://en.wikipedia.org/wiki/Pushd_and_popd http://en.wikipedia.org/wiki/Pushd_and_popd Edit: change to desktop Wikipedia URL.