> old proprietary OS or very limited embedded OS i.e. all the *BSDs? Many Linux distros that ship with BusyBox only or FreeBSD/Linux type systems (AFAIK Debia

> old proprietary OS or very limited embedded OS i.e. all the *BSDs? Many Linux distros that ship with BusyBox only or FreeBSD/Linux type systems (AFAIK Debian and also maybe Gentoo allowed FreeBSD userlands)? POSIX Sh is quite capable. I maintain even my bashrc POSIX compatible, in order to not have any problems when I want to run my config on some remote machine, or on some local BSD installation (and I did run FreeBSD for more than a year, quite feasible option for a workstation IMO).