...and that ksh descended from pdksh, and is distributed as the oksh portable project here: https://github.com/ibara/oksh https://github.com/ibara/oksh The Mi

...and that ksh descended from pdksh, and is distributed as the oksh portable project here: https://github.com/ibara/oksh https://github.com/ibara/oksh The MirBSD Korn Shell also descended from pdksh, and it can be found here: http://www.mirbsd.org/mksh.htm http://www.mirbsd.org/mksh.htm I don't know about the feature differences and code quality between these two; they both implement most of ksh88, and a small amount of ksh93. I prefer mksh when I need something more than a POSIX shell.