If for some reason you want to use OpenBSD ksh which is a modified version of pdksh (Public Domain ksh), then look no more. Somebody has taken the trouble to port the OpenBSD ksh to GNU/Linux.
So what’s the deal with the OpenBSD ksh? First, it is free being modified by the OpenBSD project people which really emphasis on software freedom. Secondly, OpenBSD people has cleaned the public-domain ksh and enhanced PD ksh with great features.
So if for some reason you need an improved open implementation of ksh, then try downloading from this website : http://www.delilinux.de/oksh/
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