Strange behaviour of the "cd" command

[Dr Rainer Woitok]

Xen,

On Tuesday, 2017-07-11 19:44:29 +0200, you wrote:

> ...
> I am no expert. I am just saying the Korn Shell and the Z Shell have 
> speed up features that make for easier navigation, but I don't remember 
> them.

The only Korn Shell specific speed-up features for easier navigation I'm
aware of is environment variable "CDPATH",  which I had explicitly unset
at the beginning of my command sequence describing the problem.

Sincerely,
  Rainer