This is a spec file I made for building an RPM of http://www.connochaetos.org/oksh/ This will get you a good version of pdksh on CentOS, RHEL, Fedora, Suse, etc. Many thanks to the guy who ported it: http://www.connochaetos.org/oksh/ Of course many thanks to everyone involved in developing ksh and the OpenBSD team! There are some pre-built RPMs in this repo, as well.