6.8 The Directory Stack
The directory stack is a list of recently-visited directories. The
pushd
builtin adds directories to the stack as it changes
the current directory, and the popd
builtin removes specified
directories from the stack and changes the current directory to
the directory removed. The dirs
builtin displays the contents
of the directory stack.
The contents of the directory stack are also visible
as the value of the DIRSTACK
shell variable.